Solution draft log for https://github.com/andchir/video-timeline/pull/115

solution-draft-log-pr-1764935929329.txt

# Solve.mjs Log - 2025-12-05T11:42:56.686Z

[2025-12-05T11:42:56.696Z] [INFO] 📁 Log file: /home/hive/solve-2025-12-05T11-42-56-685Z.log
[2025-12-05T11:42:56.718Z] [INFO]    (All output will be logged here)
[2025-12-05T11:43:02.713Z] [INFO] 
[2025-12-05T11:43:02.723Z] [INFO] 🚀 solve v0.36.11
[2025-12-05T11:43:02.733Z] [INFO] 🔧 Raw command executed:
[2025-12-05T11:43:02.738Z] [INFO]    /home/hive/.nvm/versions/node/v20.19.6/bin/node /home/hive/.bun/bin/solve https://github.com/andchir/video-timeline/issues/114 --auto-fork --auto-continue --attach-logs --verbose --no-tool-check --prefix-fork-name-with-owner-name
[2025-12-05T11:43:02.744Z] [INFO] 
[2025-12-05T11:43:02.900Z] [INFO] 
[2025-12-05T11:43:02.910Z] [WARNING] ⚠️  SECURITY WARNING: --attach-logs is ENABLED
[2025-12-05T11:43:02.917Z] [INFO] 
[2025-12-05T11:43:02.920Z] [INFO]    This option will upload the complete solution draft log file to the Pull Request.
[2025-12-05T11:43:02.928Z] [INFO]    The log may contain sensitive information such as:
[2025-12-05T11:43:02.932Z] [INFO]    • API keys, tokens, or secrets
[2025-12-05T11:43:02.935Z] [INFO]    • File paths and directory structures
[2025-12-05T11:43:02.941Z] [INFO]    • Command outputs and error messages
[2025-12-05T11:43:02.944Z] [INFO]    • Internal system information
[2025-12-05T11:43:02.952Z] [INFO] 
[2025-12-05T11:43:02.961Z] [INFO]    ⚠️  DO NOT use this option with public repositories or if the log
[2025-12-05T11:43:02.966Z] [INFO]        might contain sensitive data that should not be shared publicly.
[2025-12-05T11:43:02.976Z] [INFO] 
[2025-12-05T11:43:02.980Z] [INFO]    Continuing in 5 seconds... (Press Ctrl+C to abort)
[2025-12-05T11:43:02.985Z] [INFO] 
[2025-12-05T11:43:08.002Z] [INFO] 
[2025-12-05T11:43:08.426Z] [INFO] 💾 Disk space check: 61710MB available (500MB required) ✅
[2025-12-05T11:43:08.448Z] [INFO] 🧠 Memory check: 4399MB available, swap: 2047MB (2036MB used), total: 4410MB (256MB required) ✅
[2025-12-05T11:43:08.451Z] [INFO] ⏩ Skipping tool connection validation (dry-run mode or skip-tool-connection-check enabled)
[2025-12-05T11:43:08.453Z] [INFO] ⏩ Skipping GitHub authentication check (dry-run mode or skip-tool-connection-check enabled)
[2025-12-05T11:43:08.457Z] [INFO] 📋 URL validation:
[2025-12-05T11:43:08.459Z] [INFO]    Input URL: https://github.com/andchir/video-timeline/issues/114
[2025-12-05T11:43:08.461Z] [INFO]    Is Issue URL: true
[2025-12-05T11:43:08.462Z] [INFO]    Is PR URL: false
[2025-12-05T11:43:08.467Z] [INFO] 🔍 Checking repository access for auto-fork...
[2025-12-05T11:43:11.358Z] [INFO]    Repository visibility: public
[2025-12-05T11:43:11.364Z] [INFO] ✅ Auto-fork: No write access detected, enabling fork mode
[2025-12-05T11:43:11.374Z] [INFO] ✅ Repository access check: Skipped (fork mode enabled)
[2025-12-05T11:43:12.423Z] [INFO]    Repository visibility: public
[2025-12-05T11:43:12.430Z] [INFO]    Auto-cleanup default: false (repository is public)
[2025-12-05T11:43:12.440Z] [INFO] 🔍 Auto-continue enabled: Checking for existing PRs for issue #114...
[2025-12-05T11:43:14.684Z] [INFO] 🔍 Fork mode: Checking for existing branches in konard/andchir-video-timeline...
[2025-12-05T11:43:16.925Z] [INFO] 📝 No existing PRs found for issue #114 - creating new PR
[2025-12-05T11:43:16.939Z] [INFO] 📝 Issue mode: Working with issue #114
[2025-12-05T11:43:16.970Z] [INFO] 
Creating temporary directory: /tmp/gh-issue-solver-1764934996954
[2025-12-05T11:43:17.057Z] [INFO] 
🍴 Fork mode:                ENABLED
[2025-12-05T11:43:17.078Z] [INFO]  Checking fork status...   

[2025-12-05T11:43:18.251Z] [INFO] 🔍 Detecting fork conflicts... 
[2025-12-05T11:43:21.885Z] [INFO] ✅ No fork conflict:         Safe to proceed
[2025-12-05T11:43:23.073Z] [INFO] ✅ Fork exists:              konard/andchir-video-timeline
[2025-12-05T11:43:23.163Z] [INFO] 
📥 Cloning repository:       konard/andchir-video-timeline
[2025-12-05T11:43:28.812Z] [INFO] ✅ Cloned to:                /tmp/gh-issue-solver-1764934996954
[2025-12-05T11:43:29.119Z] [INFO] 🔗 Setting upstream:         andchir/video-timeline
[2025-12-05T11:43:29.401Z] [INFO] ℹ️ Upstream exists:          Using existing upstream remote
[2025-12-05T11:43:29.413Z] [INFO] 🔄 Fetching upstream...      
[2025-12-05T11:43:30.530Z] [INFO] ✅ Upstream fetched:         Successfully
[2025-12-05T11:43:30.539Z] [INFO] 🔄 Syncing default branch... 
[2025-12-05T11:43:31.990Z] [INFO] ℹ️ Default branch:           main
[2025-12-05T11:43:32.534Z] [INFO] ✅ Default branch synced:    with upstream/main
[2025-12-05T11:43:32.544Z] [INFO] 🔄 Pushing to fork:          main branch
[2025-12-05T11:43:35.284Z] [INFO] ✅ Fork updated:             Default branch pushed to fork
[2025-12-05T11:43:36.586Z] [INFO] 
📌 Default branch:           main
[2025-12-05T11:43:36.845Z] [INFO] 
🌿 Creating branch:          issue-114-f4c241283fee from main
[2025-12-05T11:43:37.108Z] [INFO] 🔍 Verifying:                Branch creation...
[2025-12-05T11:43:37.391Z] [INFO] ✅ Branch created:           issue-114-f4c241283fee
[2025-12-05T11:43:37.404Z] [INFO] ✅ Current branch:           issue-114-f4c241283fee
[2025-12-05T11:43:37.410Z] [INFO]    Branch operation: Create new branch
[2025-12-05T11:43:37.420Z] [INFO]    Branch verification: Matches expected
[2025-12-05T11:43:37.463Z] [INFO] 
🚀 Auto PR creation:         ENABLED
[2025-12-05T11:43:37.465Z] [INFO]      Creating:               Initial commit and draft PR...
[2025-12-05T11:43:37.475Z] [INFO] 
[2025-12-05T11:43:37.475Z] [INFO] 📝 Creating:                 CLAUDE.md with task details
[2025-12-05T11:43:37.483Z] [INFO]    Issue URL from argv['issue-url']: https://github.com/andchir/video-timeline/issues/114
[2025-12-05T11:43:37.484Z] [INFO]    Issue URL from argv._[0]: undefined
[2025-12-05T11:43:37.488Z] [INFO]    Final issue URL: https://github.com/andchir/video-timeline/issues/114
[2025-12-05T11:43:37.494Z] [INFO]    CLAUDE.md already exists, appending task info...
[2025-12-05T11:43:37.503Z] [INFO] ✅ File created:             CLAUDE.md
[2025-12-05T11:43:37.504Z] [INFO] 📦 Adding file:              To git staging
[2025-12-05T11:43:38.007Z] [INFO]    Git status after add: M  CLAUDE.md
[2025-12-05T11:43:38.015Z] [INFO] 📝 Creating commit:          With CLAUDE.md file
[2025-12-05T11:43:38.278Z] [INFO] ✅ Commit created:           Successfully with CLAUDE.md
[2025-12-05T11:43:38.289Z] [INFO]    Commit output: [issue-114-f4c241283fee 139cb61] Initial commit with task details for issue #114
 1 file changed, 13 insertions(+), 1 deletion(-)
[2025-12-05T11:43:38.500Z] [INFO]    Commit hash: 139cb61...
[2025-12-05T11:43:38.718Z] [INFO]    Latest commit: 139cb61 Initial commit with task details for issue #114
[2025-12-05T11:43:38.943Z] [INFO]    Git status: clean
[2025-12-05T11:43:39.175Z] [INFO]    Remotes: origin	https://github.com/konard/andchir-video-timeline.git (fetch)
[2025-12-05T11:43:39.427Z] [INFO]    Branch info: * issue-114-f4c241283fee 139cb61 Initial commit with task details for issue #114
  main                   19ff4e4 [origin/main] add media samples
[2025-12-05T11:43:39.434Z] [INFO] 📤 Pushing branch:           To remote repository...
[2025-12-05T11:43:39.440Z] [INFO]    Push command: git push -u origin issue-114-f4c241283fee
[2025-12-05T11:43:41.865Z] [INFO]    Push exit code: 0
[2025-12-05T11:43:41.873Z] [INFO]    Push output: remote: 
remote: Create a pull request for 'issue-114-f4c241283fee' on GitHub by visiting:        
remote:      https://github.com/konard/andchir-video-timeline/pull/new/issue-114-f4c241283fee        
remote: 
To https://github.com/konard/andchir-video-timeline.git
 * [new branch]      issue-114-f4c241283fee -> issue-114-f4c241283fee
branch 'issue-114-f4c241283fee' set up to track 'origin/issue-114-f4c241283fee'.
[2025-12-05T11:43:41.880Z] [INFO] ✅ Branch pushed:            Successfully to remote
[2025-12-05T11:43:41.883Z] [INFO]    Push output: remote: 
remote: Create a pull request for 'issue-114-f4c241283fee' on GitHub by visiting:        
remote:      https://github.com/konard/andchir-video-timeline/pull/new/issue-114-f4c241283fee        
remote: 
To https://github.com/konard/andchir-video-timeline.git
 * [new branch]      issue-114-f4c241283fee -> issue-114-f4c241283fee
branch 'issue-114-f4c241283fee' set up to track 'origin/issue-114-f4c241283fee'.
[2025-12-05T11:43:41.884Z] [INFO]    Waiting for GitHub to sync...
[2025-12-05T11:43:45.380Z] [INFO]    Compare API check: 1 commit(s) ahead of main
[2025-12-05T11:43:45.396Z] [INFO]    GitHub compare API ready: 1 commit(s) found
[2025-12-05T11:43:46.688Z] [INFO]    Branch verified on GitHub: issue-114-f4c241283fee
[2025-12-05T11:43:47.550Z] [INFO]    Remote commit SHA: 139cb61...
[2025-12-05T11:43:47.562Z] [INFO] 📋 Getting issue:            Title from GitHub...
[2025-12-05T11:43:49.092Z] [INFO]    Issue title: "Аудио и видео должны воспроизводиться только при нажатии кнопки Play"
[2025-12-05T11:43:49.105Z] [INFO] 👤 Getting user:             Current GitHub account...
[2025-12-05T11:43:50.220Z] [INFO]    Current user: konard
[2025-12-05T11:43:51.557Z] [INFO]    User is not a collaborator (will skip assignment)
[2025-12-05T11:43:51.636Z] [INFO]    User is not a collaborator (will skip assignment)
[2025-12-05T11:43:51.651Z] [INFO] 🔄 Fetching:                 Latest main branch...
[2025-12-05T11:43:53.181Z] [INFO] ✅ Base updated:             Fetched latest main
[2025-12-05T11:43:53.200Z] [INFO] 🔍 Checking:                 Commits between branches...
[2025-12-05T11:43:53.424Z] [INFO]    Commits ahead of origin/main: 1
[2025-12-05T11:43:53.442Z] [INFO] ✅ Commits found:            1 commit(s) ahead
[2025-12-05T11:43:53.450Z] [INFO] 🔀 Creating PR:              Draft pull request...
[2025-12-05T11:43:53.454Z] [INFO] 🎯 Target branch:            main (default)
[2025-12-05T11:43:53.459Z] [INFO]    PR Title: [WIP] Аудио и видео должны воспроизводиться только при нажатии кнопки Play
[2025-12-05T11:43:53.465Z] [INFO]    Base branch: main
[2025-12-05T11:43:53.475Z] [INFO]    Head branch: issue-114-f4c241283fee
[2025-12-05T11:43:53.484Z] [INFO]    Assignee: konard
[2025-12-05T11:43:53.492Z] [INFO]    PR Body:
## 🤖 AI-Powered Solution Draft

This pull request is being automatically generated to solve issue andchir/video-timeline#114.

### 📋 Issue Reference
Fixes andchir/video-timeline#114

### 🚧 Status
**Work in Progress** - The AI assistant is currently analyzing and implementing the solution draft.

### 📝 Implementation Details
_Details will be added as the solution draft is developed..._

---
*This PR was created automatically by the AI issue solver*
[2025-12-05T11:43:53.531Z] [INFO]    Command: cd "/tmp/gh-issue-solver-1764934996954" && gh pr create --draft --title "$(cat '/tmp/pr-title-1764935033522.txt')" --body-file "/tmp/pr-body-1764935033516.md" --base main --head konard:issue-114-f4c241283fee --repo andchir/video-timeline
[2025-12-05T11:43:56.395Z] [INFO] 🔍 Verifying:                PR creation...
[2025-12-05T11:43:57.595Z] [INFO] ✅ Verification:             PR exists on GitHub
[2025-12-05T11:43:57.611Z] [INFO] ✅ PR created:               #115
[2025-12-05T11:43:57.620Z] [INFO] 📍 PR URL:                   https://github.com/andchir/video-timeline/pull/115
[2025-12-05T11:43:57.623Z] [INFO] ℹ️ Note:                     Could not assign (no permission)
[2025-12-05T11:43:57.627Z] [INFO] 🔗 Linking:                  Issue #114 to PR #115...
[2025-12-05T11:43:58.917Z] [INFO]    Issue node ID: I_kwDOQMVfss7cdNb_
[2025-12-05T11:44:00.152Z] [INFO]    PR node ID: PR_kwDOQMVfss63R5iG
[2025-12-05T11:44:01.579Z] [INFO] ✅ Link verified:            Issue #114 → PR #115
[2025-12-05T11:44:02.451Z] [INFO]   👤 Current user:           konard
[2025-12-05T11:44:02.472Z] [INFO] 
📊 Comment counting conditions:
[2025-12-05T11:44:02.475Z] [INFO]    prNumber: 115
[2025-12-05T11:44:02.483Z] [INFO]    branchName: issue-114-f4c241283fee
[2025-12-05T11:44:02.489Z] [INFO]    isContinueMode: false
[2025-12-05T11:44:02.498Z] [INFO]    Will count comments: true
[2025-12-05T11:44:02.501Z] [INFO] 💬 Counting comments:        Checking for new comments since last commit...
[2025-12-05T11:44:02.508Z] [INFO]    PR #115 on branch: issue-114-f4c241283fee
[2025-12-05T11:44:02.510Z] [INFO]    Owner/Repo: andchir/video-timeline
[2025-12-05T11:44:04.573Z] [INFO]   📅 Last commit time (from API): 2025-12-05T11:43:38.000Z
[2025-12-05T11:44:08.494Z] [INFO]   💬 New PR comments:        0
[2025-12-05T11:44:08.502Z] [INFO]   💬 New issue comments:     0
[2025-12-05T11:44:08.513Z] [INFO]    Total new comments: 0
[2025-12-05T11:44:08.524Z] [INFO]    Comment lines to add: No (saving tokens)
[2025-12-05T11:44:08.527Z] [INFO]    PR review comments fetched: 0
[2025-12-05T11:44:08.536Z] [INFO]    PR conversation comments fetched: 0
[2025-12-05T11:44:08.545Z] [INFO]    Total PR comments checked: 0
[2025-12-05T11:44:17.619Z] [INFO]    Feedback info will be added to prompt:
[2025-12-05T11:44:17.646Z] [INFO]      - Pull request description was edited after last commit
[2025-12-05T11:44:17.647Z] [INFO] 📅 Getting timestamps:       From GitHub servers...
[2025-12-05T11:44:18.783Z] [INFO]   📝 Issue updated:          2025-12-05T11:41:00.000Z
[2025-12-05T11:44:20.161Z] [INFO]   💬 Comments:               None found
[2025-12-05T11:44:21.339Z] [INFO]   🔀 Recent PR:              2025-12-05T11:43:55.000Z
[2025-12-05T11:44:21.351Z] [INFO] 
✅ Reference time:           2025-12-05T11:43:55.000Z
[2025-12-05T11:44:21.357Z] [INFO] 
🔍 Checking for uncommitted changes to include as feedback...
[2025-12-05T11:44:21.637Z] [INFO] ✅ No uncommitted changes found
[2025-12-05T11:44:22.806Z] [INFO] 📦 Fork workflows detected:  https://github.com/konard/andchir-video-timeline/actions?query=branch%3Aissue-114-f4c241283fee
[2025-12-05T11:44:22.891Z] [INFO] 
📝 Final prompt structure:
[2025-12-05T11:44:22.930Z] [INFO]    Characters: 503
[2025-12-05T11:44:22.934Z] [INFO]    System prompt characters: 8471
[2025-12-05T11:44:22.942Z] [INFO]    Feedback info: Included
[2025-12-05T11:44:22.969Z] [INFO] 
🤖 Executing Claude:         SONNET
[2025-12-05T11:44:22.977Z] [INFO]    Model: sonnet
[2025-12-05T11:44:22.982Z] [INFO]    Working directory: /tmp/gh-issue-solver-1764934996954
[2025-12-05T11:44:22.984Z] [INFO]    Branch: issue-114-f4c241283fee
[2025-12-05T11:44:22.989Z] [INFO]    Prompt length: 503 chars
[2025-12-05T11:44:22.994Z] [INFO]    System prompt length: 8471 chars
[2025-12-05T11:44:23.003Z] [INFO]    Feedback info included: Yes (1 lines)
[2025-12-05T11:44:23.438Z] [INFO] 📈 System resources before execution:
[2025-12-05T11:44:23.453Z] [INFO]    Memory: MemFree:          763400 kB
[2025-12-05T11:44:23.458Z] [INFO]    Load: 10.34 9.35 9.00 11/992 2119831
[2025-12-05T11:44:23.466Z] [INFO] 
📝 Raw command:              
[2025-12-05T11:44:23.475Z] [INFO] (cd "/tmp/gh-issue-solver-1764934996954" && claude --output-format stream-json --verbose --dangerously-skip-permissions --model claude-sonnet-4-5-20250929 -p "Issue to solve: https://github.com/andchir/video-timeline/issues/114
Your prepared branch: issue-114-f4c241283fee
Your prepared working directory: /tmp/gh-issue-solver-1764934996954
Your prepared Pull Request: https://github.com/andchir/video-timeline/pull/115
Your forked repository: konard/andchir-video-timeline
Original repository (upstream): andchir/video-timeline
GitHub Actions on your fork: https://github.com/konard/andchir-video-timeline/actions?query=branch%3Aissue-114-f4c241283fee

Proceed." --append-system-prompt "You are an AI issue solver. You prefer to find the root cause of each and every issue. When you talk, you prefer to speak with facts which you have double-checked yourself or cite sources that provide evidence, like quote actual code or give references to documents or pages found on the internet. You are polite and patient, and prefer to assume good intent, trying your best to be helpful. If you are unsure or have assumptions, you prefer to test them yourself or ask questions to clarify requirements.

General guidelines.
   - When you execute commands, always save their logs to files for easier reading if the output becomes large.
   - When running commands, do not set a timeout yourself — let them run as long as needed (default timeout - 2 minutes is more than enough), and once they finish, review the logs in the file.
   - When running sudo commands (especially package installations like apt-get, yum, npm install, etc.), always run them in the background to avoid timeout issues and permission errors when the process needs to be killed. Use the run_in_background parameter or append & to the command.
   - When CI is failing or user reports failures, consider adding a detailed investigation protocol to your todo list with these steps:
      Step 1: List recent runs with timestamps using: gh run list --repo andchir/video-timeline --branch issue-114-f4c241283fee --limit 5 --json databaseId,conclusion,createdAt,headSha
      Step 2: Verify runs are after the latest commit by checking timestamps and SHA
      Step 3: For each non-passing run, download logs to preserve them: gh run view {run-id} --repo andchir/video-timeline --log > ci-logs/{workflow}-{run-id}.log
      Step 4: Read each downloaded log file using Read tool to understand the actual failures
      Step 5: Report findings with specific errors and line numbers from logs
      This detailed investigation is especially helpful when user mentions CI failures, asks to investigate logs, you see non-passing status, or when finalizing a PR.
      Note: If user says \"failing\" but tools show \"passing\", this might indicate stale data - consider downloading fresh logs and checking timestamps to resolve the discrepancy.
   - When a code or log file has more than 1500 lines, read it in chunks of 1500 lines.
   - When facing a complex problem, do as much tracing as possible and turn on all verbose modes.
   - When you create debug, test, or example/experiment scripts for fixing, always keep them in an examples and/or experiments folders so you can reuse them later.
   - When testing your assumptions, use the experiment scripts, and add it to experiments folder.
   - When your experiments can show real world use case of the software, add it to examples folder.
   - When you face something extremely hard, use divide and conquer — it always helps.

Initial research.
   - When you start, make sure you create detailed plan for yourself and follow your todo list step by step, make sure that as many points from these guidelines are added to your todo list to keep track of everything that can help you solve the issue with highest possible quality.
   - When user mentions CI failures or asks to investigate logs, consider adding these todos to track the investigation: (1) List recent CI runs with timestamps, (2) Download logs from failed runs to ci-logs/ directory, (3) Analyze error messages and identify root cause, (4) Implement fix, (5) Verify fix resolves the specific errors found in logs.
   - When you read issue, read all details and comments thoroughly.
   - When you see screenshots or images in issue descriptions, pull request descriptions, comments, or discussions, use WebFetch tool (or fetch tool) to download the image first, then use Read tool to view and analyze it.
   - When you need issue details, use gh issue view https://github.com/andchir/video-timeline/issues/114.
   - When you need related code, use gh search code --owner andchir [keywords].
   - When you need repo context, read files in your working directory.
   - When you study related work, study the most recent related pull requests.
   - When issue is not defined enough, write a comment to ask clarifying questions.
   - When accessing GitHub Gists (especially private ones), use gh gist view command instead of direct URL fetching to ensure proper authentication.
   - When you are fixing a bug, please make sure you first find the actual root cause, do as many experiments as needed.
   - When you are fixing a bug and code does not have enough tracing/logs, add them and make sure they stay in the code, but are switched off by default.
   - When you need latest comments on pull request (sorted newest first), use appropriate GitHub API commands.
   - When you need latest comments on issue (sorted newest first), use appropriate GitHub API commands.

Solution development and testing.
   - When issue is solvable, implement code with tests.
   - When coding, each atomic step that can be useful by itself should be commited to the pull request's branch, meaning if work will be interrupted by any reason parts of solution will still be kept intact and safe in pull request.
   - When you test:
      start from testing of small functions using separate scripts;
      write unit tests with mocks for easy and quick start.
   - When you test integrations, use existing framework.
   - When you test solution draft, include automated checks in pr.
   - When issue is unclear, write comment on issue asking questions.
   - When you encounter any problems that you unable to solve yourself (any human feedback or help), write a comment to the pull request asking for help.
   - When you need human help, use gh pr comment 115 --body \"your message\" to comment on existing PR.

Preparing pull request.
   - When you code, follow contributing guidelines.
   - When you commit, write clear message.
   - When you need examples of style, use gh pr list --repo andchir/video-timeline --state merged --search [keywords].
   - When you open pr, describe solution draft and include tests.
   - When there is a package with version and GitHub Actions workflows for automatic release, update the version (or other necessary release trigger) in your pull request to prepare for next release.
   - When you update existing pr 115, use gh pr edit to modify title and description.
   - When you are about to commit or push code, ALWAYS run local CI checks first if they are available in contributing guidelines (like ruff check, mypy, eslint, etc.) to catch errors before pushing.
   - When you finalize the pull request:
      follow style from merged prs for code, title, and description,
      make sure no uncommitted changes corresponding to the original requirements are left behind,
      make sure the default branch is merged to the pull request's branch,
      make sure all CI checks passing if they exist before you finish,
      double-check that all changes in the pull request answer to original requirements of the issue,
      make sure no new new bugs are introduced in pull request by carefully reading gh pr diff,
      make sure no previously existing features were removed without an explicit request from users via the issue description, issue comments, and/or pull request comments.
   - When you finish implementation, use gh pr ready 115.

Workflow and collaboration.
   - When you check branch, verify with git branch --show-current.
   - When you push, push only to branch issue-114-f4c241283fee.
   - When you finish, create a pull request from branch issue-114-f4c241283fee. (Note: PR 115 already exists, update it instead)
   - When you organize workflow, use pull requests instead of direct merges to default branch (main or master).
   - When you manage commits, preserve commit history for later analysis.
   - When you contribute, keep repository history forward-moving with regular commits, pushes, and reverts if needed.
   - When you face conflict that you cannot resolve yourself, ask for help.
   - When you collaborate, respect branch protections by working only on issue-114-f4c241283fee.
   - When you mention result, include pull request url or comment url.
   - When you need to create pr, remember pr 115 already exists for this branch.

Self review.
   - When you check your solution draft, run all tests locally.
   - When you compare with repo style, use gh pr diff [number].
   - When you finalize, confirm code, tests, and description are consistent." | jq -c .)
[2025-12-05T11:44:23.490Z] [INFO] 
[2025-12-05T11:44:23.506Z] [INFO] 📋 User prompt:
[2025-12-05T11:44:23.513Z] [INFO] ---BEGIN USER PROMPT---
[2025-12-05T11:44:23.518Z] [INFO] Issue to solve: https://github.com/andchir/video-timeline/issues/114
Your prepared branch: issue-114-f4c241283fee
Your prepared working directory: /tmp/gh-issue-solver-1764934996954
Your prepared Pull Request: https://github.com/andchir/video-timeline/pull/115
Your forked repository: konard/andchir-video-timeline
Original repository (upstream): andchir/video-timeline
GitHub Actions on your fork: https://github.com/konard/andchir-video-timeline/actions?query=branch%3Aissue-114-f4c241283fee

Proceed.
[2025-12-05T11:44:23.533Z] [INFO] ---END USER PROMPT---
[2025-12-05T11:44:23.561Z] [INFO] 
[2025-12-05T11:44:23.588Z] [INFO] 📋 System prompt:
[2025-12-05T11:44:23.618Z] [INFO] ---BEGIN SYSTEM PROMPT---
[2025-12-05T11:44:23.659Z] [INFO] You are an AI issue solver. You prefer to find the root cause of each and every issue. When you talk, you prefer to speak with facts which you have double-checked yourself or cite sources that provide evidence, like quote actual code or give references to documents or pages found on the internet. You are polite and patient, and prefer to assume good intent, trying your best to be helpful. If you are unsure or have assumptions, you prefer to test them yourself or ask questions to clarify requirements.

General guidelines.
   - When you execute commands, always save their logs to files for easier reading if the output becomes large.
   - When running commands, do not set a timeout yourself — let them run as long as needed (default timeout - 2 minutes is more than enough), and once they finish, review the logs in the file.
   - When running sudo commands (especially package installations like apt-get, yum, npm install, etc.), always run them in the background to avoid timeout issues and permission errors when the process needs to be killed. Use the run_in_background parameter or append & to the command.
   - When CI is failing or user reports failures, consider adding a detailed investigation protocol to your todo list with these steps:
      Step 1: List recent runs with timestamps using: gh run list --repo andchir/video-timeline --branch issue-114-f4c241283fee --limit 5 --json databaseId,conclusion,createdAt,headSha
      Step 2: Verify runs are after the latest commit by checking timestamps and SHA
      Step 3: For each non-passing run, download logs to preserve them: gh run view {run-id} --repo andchir/video-timeline --log > ci-logs/{workflow}-{run-id}.log
      Step 4: Read each downloaded log file using Read tool to understand the actual failures
      Step 5: Report findings with specific errors and line numbers from logs
      This detailed investigation is especially helpful when user mentions CI failures, asks to investigate logs, you see non-passing status, or when finalizing a PR.
      Note: If user says "failing" but tools show "passing", this might indicate stale data - consider downloading fresh logs and checking timestamps to resolve the discrepancy.
   - When a code or log file has more than 1500 lines, read it in chunks of 1500 lines.
   - When facing a complex problem, do as much tracing as possible and turn on all verbose modes.
   - When you create debug, test, or example/experiment scripts for fixing, always keep them in an examples and/or experiments folders so you can reuse them later.
   - When testing your assumptions, use the experiment scripts, and add it to experiments folder.
   - When your experiments can show real world use case of the software, add it to examples folder.
   - When you face something extremely hard, use divide and conquer — it always helps.

Initial research.
   - When you start, make sure you create detailed plan for yourself and follow your todo list step by step, make sure that as many points from these guidelines are added to your todo list to keep track of everything that can help you solve the issue with highest possible quality.
   - When user mentions CI failures or asks to investigate logs, consider adding these todos to track the investigation: (1) List recent CI runs with timestamps, (2) Download logs from failed runs to ci-logs/ directory, (3) Analyze error messages and identify root cause, (4) Implement fix, (5) Verify fix resolves the specific errors found in logs.
   - When you read issue, read all details and comments thoroughly.
   - When you see screenshots or images in issue descriptions, pull request descriptions, comments, or discussions, use WebFetch tool (or fetch tool) to download the image first, then use Read tool to view and analyze it.
   - When you need issue details, use gh issue view https://github.com/andchir/video-timeline/issues/114.
   - When you need related code, use gh search code --owner andchir [keywords].
   - When you need repo context, read files in your working directory.
   - When you study related work, study the most recent related pull requests.
   - When issue is not defined enough, write a comment to ask clarifying questions.
   - When accessing GitHub Gists (especially private ones), use gh gist view command instead of direct URL fetching to ensure proper authentication.
   - When you are fixing a bug, please make sure you first find the actual root cause, do as many experiments as needed.
   - When you are fixing a bug and code does not have enough tracing/logs, add them and make sure they stay in the code, but are switched off by default.
   - When you need latest comments on pull request (sorted newest first), use appropriate GitHub API commands.
   - When you need latest comments on issue (sorted newest first), use appropriate GitHub API commands.

Solution development and testing.
   - When issue is solvable, implement code with tests.
   - When coding, each atomic step that can be useful by itself should be commited to the pull request's branch, meaning if work will be interrupted by any reason parts of solution will still be kept intact and safe in pull request.
   - When you test:
      start from testing of small functions using separate scripts;
      write unit tests with mocks for easy and quick start.
   - When you test integrations, use existing framework.
   - When you test solution draft, include automated checks in pr.
   - When issue is unclear, write comment on issue asking questions.
   - When you encounter any problems that you unable to solve yourself (any human feedback or help), write a comment to the pull request asking for help.
   - When you need human help, use gh pr comment 115 --body "your message" to comment on existing PR.

Preparing pull request.
   - When you code, follow contributing guidelines.
   - When you commit, write clear message.
   - When you need examples of style, use gh pr list --repo andchir/video-timeline --state merged --search [keywords].
   - When you open pr, describe solution draft and include tests.
   - When there is a package with version and GitHub Actions workflows for automatic release, update the version (or other necessary release trigger) in your pull request to prepare for next release.
   - When you update existing pr 115, use gh pr edit to modify title and description.
   - When you are about to commit or push code, ALWAYS run local CI checks first if they are available in contributing guidelines (like ruff check, mypy, eslint, etc.) to catch errors before pushing.
   - When you finalize the pull request:
      follow style from merged prs for code, title, and description,
      make sure no uncommitted changes corresponding to the original requirements are left behind,
      make sure the default branch is merged to the pull request's branch,
      make sure all CI checks passing if they exist before you finish,
      double-check that all changes in the pull request answer to original requirements of the issue,
      make sure no new new bugs are introduced in pull request by carefully reading gh pr diff,
      make sure no previously existing features were removed without an explicit request from users via the issue description, issue comments, and/or pull request comments.
   - When you finish implementation, use gh pr ready 115.

Workflow and collaboration.
   - When you check branch, verify with git branch --show-current.
   - When you push, push only to branch issue-114-f4c241283fee.
   - When you finish, create a pull request from branch issue-114-f4c241283fee. (Note: PR 115 already exists, update it instead)
   - When you organize workflow, use pull requests instead of direct merges to default branch (main or master).
   - When you manage commits, preserve commit history for later analysis.
   - When you contribute, keep repository history forward-moving with regular commits, pushes, and reverts if needed.
   - When you face conflict that you cannot resolve yourself, ask for help.
   - When you collaborate, respect branch protections by working only on issue-114-f4c241283fee.
   - When you mention result, include pull request url or comment url.
   - When you need to create pr, remember pr 115 already exists for this branch.

Self review.
   - When you check your solution draft, run all tests locally.
   - When you compare with repo style, use gh pr diff [number].
   - When you finalize, confirm code, tests, and description are consistent.
[2025-12-05T11:44:23.678Z] [INFO] ---END SYSTEM PROMPT---
[2025-12-05T11:44:23.694Z] [INFO] 
[2025-12-05T11:44:23.713Z] [INFO] 📋 Command details:          
[2025-12-05T11:44:23.732Z] [INFO]   📂 Working directory:      /tmp/gh-issue-solver-1764934996954
[2025-12-05T11:44:23.738Z] [INFO]   🌿 Branch:                 issue-114-f4c241283fee
[2025-12-05T11:44:23.752Z] [INFO]   🤖 Model:                  Claude SONNET
[2025-12-05T11:44:23.758Z] [INFO]   🍴 Fork:                   konard/andchir-video-timeline
[2025-12-05T11:44:23.773Z] [INFO] 
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[2025-12-05T11:45:17.647Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01TxvR24TXtofgwepoAuLULD","type":"tool_result","content":"     1→# VideoEditor Template\n     2→\n     3→A professional video timeline editor built with Angular 20.3, featuring drag-and-drop functionality, media management, and real-time preview capabilities.\n     4→\n     5→**[Live Demo](https://andchir.github.io/video-timeline/)**\n     6→\n     7→## Prerequisites\n     8→\n     9→Before you begin, ensure you have the following installed:\n    10→- **Node.js** (version 20.x or higher recommended)\n    11→- **npm** (comes with Node.js)\n    12→- **Angular CLI** (optional, as the project includes `ng` via npm scripts)\n    13→\n    14→## Installation\n    15→\n    16→1. Clone the repository:\n    17→```bash\n    18→git clone https://github.com/andchir/video-timeline.git\n    19→cd video-timeline/video-timeline\n    20→```\n    21→\n    22→2. Install dependencies:\n    23→```bash\n    24→npm install\n    25→```\n    26→\n    27→## Development Mode\n    28→\n    29→### Starting the Development Server\n    30→\n    31→To run the application in development mode with hot reload:\n    32→\n    33→```bash\n    34→npm start\n    35→```\n    36→\n    37→Or using the Angular CLI directly:\n    38→\n    39→```bash\n    40→ng serve\n    41→```\n    42→\n    43→The development server will start at `http://localhost:4200/`. The application automatically reloads when you modify source files.\n    44→\n    45→### Development Configuration\n    46→\n    47→The development build includes:\n    48→- Source maps for easier debugging\n    49→- No optimization for faster builds\n    50→- No license extraction\n    51→- Detailed error messages\n    52→\n    53→### Watch Mode\n    54→\n    55→To continuously build the project while developing (without running a server):\n    56→\n    57→```bash\n    58→npm run watch\n    59→```\n    60→\n    61→This runs `ng build --watch --configuration development` and rebuilds on 
[2025-12-05T11:45:17.764Z] [INFO] file changes.\n    62→\n    63→## Running Tests\n    64→\n    65→### Unit Tests\n    66→\n    67→Execute unit tests using the [Karma](https://karma-runner.github.io) test runner:\n    68→\n    69→```bash\n    70→npm test\n    71→```\n    72→\n    73→Or with Angular CLI:\n    74→\n    75→```bash\n    76→ng test\n    77→```\n    78→\n    79→This will:\n    80→- Launch the Karma test runner\n    81→- Open a browser window\n    82→- Run all `*.spec.ts` test files\n    83→- Watch for changes and re-run tests automatically\n    84→\n    85→### Test Configuration\n    86→\n    87→Tests are configured with:\n    88→- **Test Framework**: Jasmine 5.9\n    89→- **Test Runner**: Karma 6.4\n    90→- **Browsers**: Chrome (via karma-chrome-launcher)\n    91→- **Coverage**: Available via karma-coverage\n    92→\n    93→To run tests with coverage:\n    94→\n    95→```bash\n    96→ng test --code-coverage\n    97→```\n    98→\n    99→Coverage reports will be generated in the `coverage/` directory.\n   100→\n   101→## Production Build\n   102→\n   103→### Building for Production\n   104→\n   105→To create an optimized production build:\n   106→\n   107→```bash\n   108→npm run build\n   109→```\n   110→\n   111→Or with Angular CLI:\n   112→\n   113→```bash\n   114→ng build\n   115→```\n   116→\n   117→Or explicitly specify production configuration:\n   118→\n   119→```bash\n   120→ng build --configuration production\n   121→```\n   122→\n   123→### Production Build Output\n   124→\n   125→The production build will:\n   126→- Compile and bundle all source files\n   127→- Output to the `dist/` directory\n   128→- Apply optimizations (minification, tree-shaking)\n   129→- Add output hashing for cache busting\n   130→- Extract licenses\n   131→\n   132→### Build Budgets\n   133→\n   134→The production build enforces the following size budgets:\n   135→- **Initial bundle**: Warning at 500kB, error at 1MB\n   136→- **Component styles**: Warning at 4kB, error at 8kB\n   137→\n   138→### Serving Production Build Locally\n   139→\n   140→To test the production build locally, you can use a simple HTTP server:\n   141→\n   142→```bash\n   143→npx http-server dist/video-timeline/browser -p 8080\n   144→```\n   145→\n   146→Then open `http://localhost:8080` in your browser.\n   147→\n   148→## Code Scaffolding\n   149→\n   150→Generate new Angular components, services, and other schematics:\n   151→\n   152→```bash\n   153→# Generate a component\n   154→ng generate component component-name\n   155→\n   156→# Generate a service\n   157→ng generate service service-name\n   158→\n   159→# Generate a directive\n   160→ng generate directive directive-name\n   161→\n   162→# View all available schematics\n   163→ng generate --help\n   164→```\n   165→\n   166→## Project Structure\n   167→\n   168→```\n   169→video-timeline/\n   170→├── src/\n   171→│   ├── app/\n   172→│   │   ├── components/\n   173→│   │   │   └── timeline/          # Main timeline component\n   174→│   │   ├── models/                # TypeScript interfaces and types\n   175→│   │   ├── app.ts                 # Root component\n   176→│   │   ├── app.config.ts          # Application configuration\n   177→│   │   └── app.routes.ts          # Routing configuration\n   178→│   ├── styles.css                 # Global styles\n   179→│   ├── main.ts                    # Application entry point\n   180→│   └── index.html                 # HTML entry point\n   181→├── public/                        # Static assets\n   182→├── angular.json                   # Angular CLI configuration\n   183→├── tsconfig.json                  # TypeScript configuration\n   184→└── package.json                   # Dependencies and scripts\n   185→```\n   186→\n   187→## Available npm Scripts\n   188→\n   189→| Script | Command | Description |\n   190→|--------|---------|-------------|\n   191→| `start` | `ng serve` | Start development server |\n   192→| `build` | `ng build` | Build for production |\n   193→| `watch` | `ng build --watch --configuration development` | Build and watch for changes |\n   194→| `test` | `ng test` | Run unit tests |\n   195→| `ng` | `ng` | Access Angular CLI commands directly |\n   196→\n   197→## Technologies Used\n   198→\n   199→- **Angular 20.3** - Modern web application framework\n   200→- **TypeScript 5.9** - Typed superset of JavaScript\n   201→- **Tailwind CSS 4.1** - Utility-first CSS framework\n   202→- **Bootstrap Icons 1.13** - Icon library\n   203→- **RxJS 7.8** - Reactive programming library\n   204→- **Jasmine & Karma** - Testing framework and runner\n   205→\n   206→## Code Quality\n   207→\n   208→### Prettier Configuration\n   209→\n   210→The project includes Prettier for code formatting:\n   211→- Print width: 100 characters\n   212→- Single quotes enabled\n   213→- Angular HTML parser for templates\n   214→\n   215→Format code using your IDE's Prettier integration or:\n   216→\n   217→```bash\n   218→npx prettier --write \"src/**/*.{ts,html,css}\"\n   219→```\n   220→\n   221→### TypeScript Configuration\n   222→\n   223→- Strict mode enabled for type safety\n   224→- Target: ES2022\n   225→- Module: ES2022\n   226→\n   227→## Browser Support\n   228→\n   229→The application is optimized for modern browsers supporting ES2022 features.\n   230→\n   231→## Deployment\n   232→\n   233→### GitHub Pages\n   234→\n   235→This project is automatically deployed to GitHub Pages using GitHub Actions. The deployment happens automatically when changes are pushed to the `main` branch.\n   236→\n   237→#### Initial Setup\n   238→\n   239→Before the deployment workflow can run successfully, GitHub Pages must be configured for the repository:\n   240→\n   241→1. Go to your repository **Settings** → **Pages**\n   242→2. Under **Build and deployment**, set **Source** to **GitHub Actions**\n   243→3. Save the settings\n   244→\n   245→The workflow will then be able to deploy automatically on every push to `main`.\n   246→\n   247→**Note**: The workflow includes `enablement: true` in the `actions/configure-pages` step, which attempts to enable GitHub Pages automatically. However, if this fails with a permissions error, manual setup through repository settings (as described above) is required.\n   248→\n   249→#### How it Works\n   250→\n   251→1. **GitHub Actions Workflow**: The `.github/workflows/deploy.yml` file defines a CI/CD pipeline that:\n   252→   - Triggers on every push to the `main` branch\n   253→   - Can also be triggered manually via workflow_dispatch\n   254→   - Installs Node.js and project dependencies\n   255→   - Builds the Angular application with the correct base-href for GitHub Pages\n   256→   - Uploads the build artifacts to GitHub Pages\n   257→   - Deploys the application\n   258→\n   259→2. **Build Configuration**: The application is built with `--base-href=/video-timeline/` to ensure all resources are loaded correctly from the GitHub Pages subdirectory.\n   260→\n   261→3. **Output**: The production build is created in `video-timeline/dist/video-timeline/browser/` and includes:\n   262→   - Optimized and minified JavaScript bundles\n   263→   - CSS files with Tailwind utilities\n   264→   - Static assets from the `public/` directory\n   265→   - Index.html with proper base-href configuration\n   266→\n   267→#### Manual Deployment\n   268→\n   269→To deploy manually, you can trigger the workflow from the Actions tab in the GitHub repository, or push changes to the `main` branch.\n   270→\n   271→#### Local Testing\n   272→\n   273→To test the production build locally with the correct base-href:\n   274→\n   275→```bash\n   276→cd video-timeline\n   277→npm run build -- --base-href=/video-timeline/\n   278→npx http-server dist/video-timeline/browser -p 8080\n   279→```\n   280→\n   281→Then open `http://localhost:8080/video-timeline/` in your browser.\n   282→\n   283→## Contributing\n   284→\n   285→When contributing to this project:\n   286→1. Follow the existing code style and conventions\n   287→2. Write tests for new features\n   288→3. Ensure all tests pass before submitting\n   289→4. Update documentation as needed\n   290→\n   291→## Additional Resources\n   292→\n   293→- [Angular Documentation](https://angular.dev)\n   294→- [Angular CLI Command Reference](https://angular.dev/tools/cli)\n   295→- [TypeScript Documentation](https://www.typescriptlang.org/docs/)\n   296→- [Tailwind CSS Documentation](https://tailwindcss.com/docs)\n   297→\n   298→## License\n   299→\n   300→ISC\n   301→\n   302→---\n   303→\n   304→This project was generated using [Angular CLI](https://github.com/angular/angular-cli) version 20.3.8.\n   305→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"parent_tool_use_id":null,"session_id":"084914e4-263f-4bd0-8b1a-fcc69335a956","uuid":"676370d8-e2f0-4600-a301-616f404375cc","tool_use_result":{"type":"text","file":{"filePath":"/tmp/gh-issue-solver-1764934996954/README.md","content":"# VideoEditor Template\n\nA professional video timeline editor built with Angular 20.3, featuring drag-and-drop functionality, media management, and real-time preview capabilities.\n\n**[Live Demo](https://andchir.github.io/video-timeline/)**\n\n## Prerequisites\n\nBefore you begin, ensure you have the following installed:\n- **Node.js** (version 20.x or higher recommended)\n- **npm** (comes with Node.js)\n- **Angular CLI** (optional, as the project includes `ng` via npm scripts)\n\n## Installation\n\n1. Clone the repository:\n```bash\ngit clone https://github.com/andchir/video-timeline.git\ncd video-timeline/video-timeline\n```\n\n2. Install dependencies:\n```bash\nnpm install\n```\n\n## Development Mode\n\n### Starting the Development Server\n\nTo run the application in development mode with hot reload:\n\n```bash\nnpm start\n```\n\nOr using the Angular CLI directly:\n\n```bash\nng serve\n```\n\nThe development server will start at `http://localhost:4200/`. The application automatically reloads when you modify source files.\n\n### Development Configuration\n\nThe development build includes:\n- Source maps for easier debugging\n- No optimization for faster builds\n- No license extraction\n- Detailed error messages\n\n### Watch Mode\n\nTo continuously build the project while developing (without running a server):\n\n```bash\nnpm run watch\n```\n\nThis runs `ng build --watch --configuration development` and rebuilds on file changes.\n\n## Running Tests\n\n### Unit Tests\n\nExecute unit tests using the [Karma](https://karma-runner.github.io) test runner:\n\n```bash\nnpm test\n```\n\nOr with Angular CLI:\n\n```bash\nng test\n```\n\nThis will:\n- Launch the Karma test runner\n- Open a browser window\n- Run all `*.spec.ts` test files\n- Watch for changes and re-run tests automatically\n\n### Test Configuration\n\nTests are configured with:\n- **Test Framework**: Jasmine 5.9\n- **Test Runner**: Karma 6.4\n- **Browsers**: Chrome (via karma-chrome-launcher)\n- **Coverage**: Available via karma-coverage\n\nTo run tests with coverage:\n\n```bash\nng test --code-coverage\n```\n\nCoverage reports will be generated in the `coverage/` directory.\n\n## Production Build\n\n### Building for Production\n\nTo create an optimized production build:\n\n```bash\nnpm run build\n```\n\nOr with Angular CLI:\n\n```bash\nng build\n```\n\nOr explicitly specify production configuration:\n\n```bash\nng build --configuration production\n```\n\n### Production Build Output\n\nThe production build will:\n- Compile and bundle all source files\n- Output to the `dist/` directory\n- Apply optimizations (minification, tree-shaking)\n- Add output hashing for cache busting\n- Extract licenses\n\n### Build Budgets\n\nThe production build enforces the following size budgets:\n- **Initial bundle**: Warning at 500kB, error at 1MB\n- **Component styles**: Warning at 4kB, error at 8kB\n\n### Serving Production Build Locally\n\nTo test the production build locally, you can use a simple HTTP server:\n\n```bash\nnpx http-server dist/video-timeline/browser -p 8080\n```\n\nThen open `http://localhost:8080` in your browser.\n\n## Code Scaffolding\n\nGenerate new Angular components, services, and other schematics:\n\n```bash\n# Generate a component\nng generate component component-name\n\n# Generate a service\nng generate service service-name\n\n# Generate a directive\nng generate directive directive-name\n\n# View all available schematics\nng generate --help\n```\n\n## Project Structure\n\n```\nvideo-timeline/\n├── src/\n│   ├── app/\n│   │   ├── components/\n│   │   │   └── timeline/          # Main timeline component\n│   │   ├── models/                # TypeScript interfaces and types\n│   │   ├── app.ts                 # Root component\n│   │   ├── app.config.ts          # Application configuration\n│   │   └── app.routes.ts          # Routing configuration\n│   ├── styles.css                 # Global styles\n│   ├── main.ts                    # Application entry point\n│   └── index.html                 # HTML entry point\n├── public/                        # Static assets\n├── angular.json                   # Angular CLI configuration\n├── tsconfig.json                  # TypeScript configuration\n└── package.json                   # Dependencies and scripts\n```\n\n## Available npm Scripts\n\n| Script | Command | Description |\n|--------|---------|-------------|\n| `start` | `ng serve` | Start development server |\n| `build` | `ng build` | Build for production |\n| `watch` | `ng build --watch --configuration development` | Build and watch for changes |\n| `test` | `ng test` | Run unit tests |\n| `ng` | `ng` | Access Angular CLI commands directly |\n\n## Technologies Used\n\n- **Angular 20.3** - Modern web application framework\n- **TypeScript 5.9** - Typed superset of JavaScript\n- **Tailwind CSS 4.1** - Utility-first CSS framework\n- **Bootstrap Icons 1.13** - Icon library\n- **RxJS 7.8** - Reactive programming library\n- **Jasmine & Karma** - Testing framework and runner\n\n## Code Quality\n\n### Prettier Configuration\n\nThe project includes Prettier for code formatting:\n- Print width: 100 characters\n- Single quotes enabled\n- Angular HTML parser for templates\n\nFormat code using your IDE's Prettier integration or:\n\n```bash\nnpx prettier --write \"src/**/*.{ts,html,css}\"\n```\n\n### TypeScript Configuration\n\n- Strict mode enabled for type safety\n- Target: ES2022\n- Module: ES2022\n\n## Browser Support\n\nThe application is optimized for modern browsers supporting ES2022 features.\n\n## Deployment\n\n### GitHub Pages\n\nThis project is automatically deployed to GitHub Pages using GitHub Actions. The deployment happens automatically when changes are pushed to the `main` branch.\n\n#### Initial Setup\n\nBefore the deployment workflow can run successfully, GitHub Pages must be configured for the repository:\n\n1. Go to your repository **Settings** → **Pages**\n2. Under **Build and deployment**, set **Source** to **GitHub Actions**\n3. Save the settings\n\nThe workflow will then be able to deploy automatically on every push to `main`.\n\n**Note**: The workflow includes `enablement: true` in the `actions/configure-pages` step, which attempts to enable GitHub Pages automatically. However, if this fails with a permissions error, manual setup through repository settings (as described above) is required.\n\n#### How it Works\n\n1. **GitHub Actions Workflow**: The `.github/workflows/deploy.yml` file defines a CI/CD pipeline that:\n   - Triggers on every push to the `main` branch\n   - Can also be triggered manually via workflow_dispatch\n   - Installs Node.js and project dependencies\n   - Builds the Angular application with the correct base-href for GitHub Pages\n   - Uploads the build artifacts to GitHub Pages\n   - Deploys the application\n\n2. **Build Configuration**: The application is built with `--base-href=/video-timeline/` to ensure all resources are loaded correctly from the GitHub Pages subdirectory.\n\n3. **Output**: The production build is created in `video-timeline/dist/video-timeline/browser/` and includes:\n   - Optimized and minified JavaScript bundles\n   - CSS files with Tailwind utilities\n   - Static assets from the `public/` directory\n   - Index.html with proper base-href configuration\n\n#### Manual Deployment\n\nTo deploy manually, you can trigger the workflow from the Actions tab in the GitHub repository, or push changes to the `main` branch.\n\n#### Local Testing\n\nTo test the production build locally with the correct base-href:\n\n```bash\ncd video-timeline\nnpm run build -- --base-href=/video-timeline/\nnpx http-server dist/video-timeline/browser -p 8080\n```\n\nThen open `http://localhost:8080/video-timeline/` in your browser.\n\n## Contributing\n\nWhen contributing to this project:\n1. Follow the existing code style and conventions\n2. Write tests for new features\n3. Ensure all tests pass before submitting\n4. Update documentation as needed\n\n## Additional Resources\n\n- [Angular Documentation](https://angular.dev)\n- [Angular CLI Command Reference](https://angular.dev/tools/cli)\n- [TypeScript Documentation](https://www.typescriptlang.org/docs/)\n- [Tailwind CSS Documentation](https://tailwindcss.com/docs)\n\n## License\n\nISC\n\n---\n\nThis project was generated using [Angular CLI](https://github.com/angular/angular-cli) version 20.3.8.\n","numLines":305,"startLine":1,"totalLines":305}}}
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        "type": "tool_result",
        "content": "     1→import { Injectable, signal, computed } from '@angular/core';\n     2→import { MediaItem, MediaType, Track } from '../models/timeline.models';\n     3→\n     4→/**\n     5→ * Represents an active media element being played\n     6→ */\n     7→export interface ActiveMedia {\n     8→  item: MediaItem;\n     9→  element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n    10→  trackOrder: number; // For layering: lower order = rendered first (bottom layer)\n    11→}\n    12→\n    13→/**\n    14→ * Service responsible for managing real media playback.\n    15→ * Handles synchronization of media elements with timeline playhead position.\n    16→ */\n    17→@Injectable({\n    18→  providedIn: 'root'\n    19→})\n    20→export class PlaybackService {\n    21→  // Playback state\n    22→  private _isPlaying = signal<boolean>(false);\n    23→  private _playheadPosition = signal<number>(0);\n    24→  private animationFrameId: number | null = null;\n    25→  private lastFrameTime: number = 0;\n    26→\n    27→  // Active media elements\n    28→  private activeMediaMap = new Map<string, ActiveMedia>();\n    29→\n    30→  // Canvas reference for rendering\n    31→  private canvas: HTMLCanvasElement | null = null;\n    32→  private canvasContext: Canva**************ext2D | null = null;\n    33→\n    34→  // Exposed signals\n    35→  readonly isPlaying = this._isPlaying.asReadonly();\n    36→  readonly playheadPosition = this._playheadPosition.asReadonly();\n    37→\n    38→  // Computed: current active media items for rendering\n    39→  readonly activeMediaItems = computed(() => {\n    40→    return Array.from(this.activeMediaMap.values())\n    41→      .sort((a, b) => a.trackOrder - b.trackOrder);\n    42→  });\n    43→\n    44→  constructor() {}\n    45→\n    46→  /**\n    47→   * Set the canvas element for rendering video/image preview\n    48→   */\n    49→  setCanvas(canvas: HTMLCanvasElement): void {\n    50→    this.canvas = canvas;\n    51→    this.canvasContext = canvas.getContext('2d');\n    52→  }\n    53→\n    54→  /**\n    55→   * Update playhead position (called from timeline component)\n    56→   */\n    57→  setPlayheadPosition(position: number): void {\n    58→    this._playheadPosition.set(position);\n    59→  }\n    60→\n    61→  /**\n    62→   * Start playback\n    63→   */\n    64→  play(tracks: Track[], totalDuration: number): void {\n    65→    if (this._isPlaying()) return;\n    66→\n    67→    this._isPlaying.set(true);\n    68→    this.lastFrameTime = performance.now();\n    69→    this.startPlaybackLoop(tracks, totalDuration);\n    70→  }\n    71→\n    72→  /**\n    73→   * Pause playback\n    74→   */\n    75→  pause(): void {\n    76→    this._isPlaying.set(false);\n    77→    if (this.animationFrameId !== null) {\n    78→      cancelAnimationFrame(this.animationFrameId);\n    79→      this.animationFrameId = null;\n    80→    }\n    81→\n    82→    // Pause all active media\n    83→    for (const activeMedia of this.activeMediaMap.values()) {\n    84→      if (activeMedia.element instanceof HTMLVideoElement ||\n    85→          activeMedia.element instanceof HTMLAudioElement) {\n    86→        activeMedia.element.pause();\n    87→      }\n    88→    }\n    89→  }\n    90→\n    91→  /**\n    92→   * Stop playback and reset position\n    93→   */\n    94→  stop(): void {\n    95→    this.pause();\n    96→    this._playheadPosition.set(0);\n    97→    this.cleanupAllMedia();\n    98→  }\n    99→\n   100→  /**\n   101→   * Main playback loop - advances playhead and synchronizes media\n   102→   */\n   103→  private startPlaybackLoop(tracks: Track[], totalDuration: number): void {\n   104→    const animate = (currentTime: number) => {\n   105→      if (!this._isPlaying()) return;\n   106→\n   107→      // Calculate delta time\n   108→      const deltaTime = currentTime - this.lastFrameTime;\n   109→      this.lastFrameTime = currentTime;\n   110→\n   111→      // Update playhead position\n   112→      let newPosition = this._playheadPosition() + deltaTime;\n   113→\n   114→      // Check if we've reached the end\n   115→      if (newPosition >= totalDuration) {\n   116→        newPosition = totalDuration;\n   117→        this.pause();\n   118→      }\n   119→\n   120→      this._playheadPosition.set(newPosition);\n   121→\n   122→      // Synchronize media with new position\n   123→      this.synchronizeMedia(tracks, newPosition);\n   124→\n   125→      // Render to canvas\n   126→      this.renderToCanvas();\n   127→\n   128→      // Continue animation loop\n   129→      if (this._isPlaying()) {\n   130→        this.animationFrameId = requestAnimationFrame(animate);\n   131→      }\n   132→    };\n   133→\n   134→    this.animationFrameId = requestAnimationFrame(animate);\n   135→  }\n   136→\n   137→  /**\n   138→   * Synchronize media elements with the current playhead position.\n   139→   * Start/stop media as playhead enters/exits their time range.\n   140→   */\n   141→  private synchronizeMedia(tracks: Track[], playheadTime: number): void {\n   142→    // Collect all items that should be active at current time\n   143→    const shouldBeActive = new Map<string, { item: MediaItem; trackOrder: number }>();\n   144→\n   145→    for (const track of tracks) {\n   146→      for (const item of track.items) {\n   147→        const itemEnd = item.startTime + item.duration;\n   148→\n   149→        // Check if playhead is within item's time range\n   150→        if (playheadTime >= item.startTime && playheadTime < itemEnd) {\n   151→          // Skip placeholders without URL\n   152→          if (item.isPlaceholder || !item.url) continue;\n   153→\n   154→          shouldBeActive.set(item.id, { item, trackOrder: track.order });\n   155→        }\n   156→      }\n   157→    }\n   158→\n   159→    // Stop media that should no longer be active\n   160→    for (const [id, activeMedia] of this.activeMediaMap.entries()) {\n   161→      if (!shouldBeActive.has(id)) {\n   162→        this.stopMedia(activeMedia);\n   163→        this.activeMediaMap.delete(id);\n   164→      }\n   165→    }\n   166→\n   167→    // Start or update media that should be active\n   168→    for (const [id, { item, trackOrder }] of shouldBeActive.entries()) {\n   169→      if (!this.activeMediaMap.has(id)) {\n   170→        // Start new media\n   171→        this.startMedia(item, trackOrder, playheadTime);\n   172→      } else {\n   173→        // Update existing media position if needed\n   174→        this.updateMediaPosition(this.activeMediaMap.get(id)!, playheadTime);\n   175→      }\n   176→    }\n   177→  }\n   178→\n   179→  /**\n   180→   * Start playing a media item\n   181→   */\n   182→  private startMedia(item: MediaItem, trackOrder: number, playheadTime: number): void {\n   183→    if (!item.url) return;\n   184→\n   185→    const mediaStartTime = item.mediaStartTime || 0;\n   186→    const offsetInItem = playheadTime - item.startTime;\n   187→    const mediaTime = (mediaStartTime + offsetInItem) / 1000; // Convert to seconds\n   188→\n   189→    let element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n   190→\n   191→    switch (item.type) {\n   192→      case MediaType.VIDEO:\n   193→        element = document.createElement('video');\n   194→        (element as HTMLVideoElement).src = item.url;\n   195→        (element as HTMLVideoElement).currentTime = mediaTime;\n   196→        (element as HTMLVideoElement).muted = false;\n   197→        (element as HTMLVideoElement).play().catch(() => {\n   198→          // Autoplay may be blocked, try muted\n   199→          (element as HTMLVideoElement).muted = true;\n   200→          (element as HTMLVideoElement).play().catch(() => {});\n   201→        });\n   202→        break;\n   203→\n   204→      case MediaType.AUDIO:\n   205→        element = document.createElement('audio');\n   206→        (element as HTMLAudioElement).src = item.url;\n   207→        (element as HTMLAudioElement).currentTime = mediaTime;\n   208→        (element as HTMLAudioElement).play().catch(() => {});\n   209→        break;\n   210→\n   211→      case MediaType.IMAGE:\n   212→        element = document.createElement('img');\n   213→        (element as HTMLImageElement).src = item.url;\n   214→        (element as HTMLImageElement).crossOrigin = 'anonymous';\n   215→        break;\n   216→\n   217→      default:\n   218→        return;\n   219→    }\n   220→\n   221→    // For video, also set crossOrigin for canvas rendering\n   222→    if (element instanceof HTMLVideoElement) {\n   223→      element.crossOrigin = 'anonymous';\n   224→    }\n   225→\n   226→    this.activeMediaMap.set(item.id, { item, element, trackOrder });\n   227→  }\n   228→\n   229→  /**\n   230→   * Stop and cleanup a media element\n   231→   */\n   232→  private stopMedia(activeMedia: ActiveMedia): void {\n   233→    const { element } = activeMedia;\n   234→\n   235→    if (element instanceof HTMLVideoElement || element instanceof HTMLAudioElement) {\n   236→      element.pause();\n   237→      element.src = '';\n   238→      element.load();\n   239→    }\n   240→  }\n   241→\n   242→  /**\n   243→   * Update media playback position if it's out of sync\n   244→   */\n   245→  private updateMediaPosition(activeMedia: ActiveMedia, playheadTime: number): void {\n   246→    const { item, element } = activeMedia;\n   247→\n   248→    if (element instanceof HTMLVideoElement || element instanceof HTMLAudioElement) {\n   249→      const mediaStartTime = item.mediaStartTime || 0;\n   250→      const offsetInItem = playheadTime - item.startTime;\n   251→      const expectedMediaTime = (mediaStartTime + offsetInItem) / 1000;\n   252→      const currentMediaTime = element.currentTime;\n   253→\n   254→      // If more than 0.3 seconds out of sync, seek to correct position\n   255→      if (Math.abs(currentMediaTime - expectedMediaTime) > 0.3) {\n   256→        element.currentTime = expectedMediaTime;\n   257→      }\n   258→    }\n   259→  }\n   260→\n   261→  /**\n   262→   * Render active media to canvas with proper layering\n   263→   */\n   264→  private renderToCanvas(): void {\n   265→    if (!this.canvas || !this.canvasContext) return;\n   266→\n   267→    const ctx = this.canvasContext;\n   268→    const canvasWidth = this.canvas.width;\n   269→    const canvasHeight = this.canvas.height;\n   270→\n   271→    // Clear canvas\n   272→    ctx.fillStyle = '#1a1a1a';\n   273→    ctx.fillRect(0, 0, canvasWidth, canvasHeight);\n   274→\n   275→    // Get active media sorted by track order (lower order = bottom layer)\n   276→    const sortedMedia = Array.from(this.activeMediaMap.values())\n   277→      .sort((a, b) => a.trackOrder - b.trackOrder);\n   278→\n   279→    // Render each media item\n   280→    for (const activeMedia of sortedMedia) {\n   281→      this.renderMediaItem(activeMedia, ctx, canvasWidth, canvasHeight);\n   282→    }\n   283→  }\n   284→\n   285→  /**\n   286→   * Render a single media item to canvas with proper scaling\n   287→   */\n   288→  private renderMediaItem(\n   289→    activeMedia: ActiveMedia,\n   290→    ctx: CanvasRenderingContext2D,\n   291→    canvasWidth: number,\n   292→    canvasHeight: number\n   293→  ): void {\n   294→    const { element, item } = activeMedia;\n   295→\n   296→    // Only render video and image types\n   297→    if (item.type === MediaType.AUDIO) return;\n   298→\n   299→    let source: CanvasImageSource | null = null;\n   300→    let sourceWidth = 0;\n   301→    let sourceHeight = 0;\n   302→\n   303→    if (element instanceof HTMLVideoElement) {\n   304→      // Check if video has loaded enough to render\n   305→      if (element.readyState < 2) return;\n   306→      source = element;\n   307→      sourceWidth = element.videoWidth;\n   308→      sourceHeight = element.videoHeight;\n   309→    } else if (element instanceof HTMLImageElement) {\n   310→      // Check if image is loaded\n   311→      if (!element.complete || element.naturalWidth === 0) return;\n   312→      source = element;\n   313→      sourceWidth = element.naturalWidth;\n   314→      sourceHeight = element.naturalHeight;\n   315→    }\n   316→\n   317→    if (!source || sourceWidth === 0 || sourceHeight === 0) return;\n   318→\n   319→    // Calculate scaled dimensions maintaining aspect ratio\n   320→    const { width, height, x, y } = this.calculateScaledDimensions(\n   321→      sourceWidth,\n   322→      sourceHeight,\n   323→      canvasWidth,\n   324→      canvasHeight\n   325→    );\n   326→\n   327→    // Draw the media\n   328→    ctx.drawImage(source, x, y, width, height);\n   329→  }\n   330→\n   331→  /**\n   332→   * Calculate dimensions for media that fit within canvas while preserving aspect ratio\n   333→   */\n   334→  private calculateScaledDimensions(\n   335→    sourceWidth: number,\n   336→    sourceHeight: number,\n   337→    canvasWidth: number,\n   338→    canvasHeight: number\n   339→  ): { width: number; height: number; x: number; y: number } {\n   340→    const sourceAspect = sourceWidth / sourceHeight;\n   341→    const canvasAspect = canvasWidth / canvasHeight;\n   342→\n   343→    let width: number;\n   344→    let height: number;\n   345→\n   346→    if (sourceAspect > canvasAspect) {\n   347→      // Source is wider - fit to width\n   348→      width = canvasWidth;\n   349→      height = canvasWidth / sourceAspect;\n   350→    } else {\n   351→      // Source is taller - fit to height\n   352→      height = canvasHeight;\n   353→      width = canvasHeight * sourceAspect;\n   354→    }\n   355→\n   356→    // Center the media\n   357→    const x = (canvasWidth - width) / 2;\n   358→    const y = (canvasHeight - height) / 2;\n   359→\n   360→    return { width, height, x, y };\n   361→  }\n   362→\n   363→  /**\n   364→   * Cleanup all active media\n   365→   */\n   366→  private cleanupAllMedia(): void {\n   367→    for (const activeMedia of this.activeMediaMap.values()) {\n   368→      this.stopMedia(activeMedia);\n   369→    }\n   370→    this.activeMediaMap.clear();\n   371→  }\n   372→\n   373→  /**\n   374→   * Seek to a specific position and update media accordingly\n   375→   */\n   376→  seek(tracks: Track[], position: number): void {\n   377→    this._playheadPosition.set(position);\n   378→\n   379→    // Update all active media positions\n   380→    for (const activeMedia of this.activeMediaMap.values()) {\n   381→      const { item, element } = activeMedia;\n   382→      const itemEnd = item.startTime + item.duration;\n   383→\n   384→      // Check if media should still be active at new position\n   385→      if (position < item.startTime || position >= itemEnd) {\n   386→        // Media should no longer be active\n   387→        this.stopMedia(activeMedia);\n   388→        this.activeMediaMap.delete(item.id);\n   389→      } else if (element instanceof HTMLVideoElement || element instanceof HTMLAudioElement) {\n   390→        // Seek to correct position in media\n   391→        const mediaStartTime = item.mediaStartTime || 0;\n   392→        const offsetInItem = position - item.startTime;\n   393→        element.currentTime = (mediaStartTime + offsetInItem) / 1000;\n   394→      }\n   395→    }\n   396→\n   397→    // Synchronize to add any new media that should be active\n   398→    this.synchronizeMedia(tracks, position);\n   399→\n   400→    // Render current frame\n   401→    this.renderToCanvas();\n   402→  }\n   403→\n   404→  /**\n   405→   * Force render the current state to canvas (useful when paused)\n   406→   */\n   407→  renderCurrentFrame(): void {\n   408→    this.renderToCanvas();\n   409→  }\n   410→}\n   411→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"
      }
    ]
  },
  "parent_tool_use_id": null,
  "session_id": "084914e4-263f-4bd0-8b1a-fcc69335a956",
  "uuid": "15c31b09-4d46-4fb4-b5ec-85f47ec2d929",
  "tool_use_result": {
    "type": "text",
    "file": {
      "filePath": "/tmp/gh-issue-solver-1764934996954/video-timeline/src/app/services/playback.service.ts",
      "content": "import { Injectable, signal, computed } from '@angular/core';\nimport { MediaItem, MediaType, Track } from '../models/timeline.models';\n\n/**\n * Represents an active media element being played\n */\nexport interface ActiveMedia {\n  item: MediaItem;\n  element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n  trackOrder: number; // For layering: lower order = rendered first (bottom layer)\n}\n\n/**\n * Service responsible for managing real media playback.\n * Handles synchronization of media elements with timeline playhead position.\n */\n@Injectable({\n  providedIn: 'root'\n})\nexport class PlaybackService {\n  // Playback state\n  private _isPlaying = signal<boolean>(false);\n  private _playheadPosition = signal<number>(0);\n  private animationFrameId: number | null = null;\n  private lastFrameTime: number = 0;\n\n  // Active media elements\n  private activeMediaMap = new Map<string, ActiveMedia>();\n\n  // Canvas reference for rendering\n  private canvas: HTMLCanvasElement | null = null;\n  private canvasContext: Canva**************ext2D | null = null;\n\n  // Exposed signals\n  readonly isPlaying = this._isPlaying.asReadonly();\n  readonly playheadPosition = this._playheadPosition.asReadonly();\n\n  // Computed: current active media items for rendering\n  readonly activeMediaItems = computed(() => {\n    return Array.from(this.activeMediaMap.values())\n      .sort((a, b) => a.trackOrder - b.trackOrder);\n  });\n\n  constructor() {}\n\n  /**\n   * Set the canvas element for rendering video/image preview\n   */\n  setCanvas(canvas: HTMLCanvasElement): void {\n    this.canvas = canvas;\n    this.canvasContext = canvas.getContext('2d');\n  }\n\n  /**\n   * Update playhead position (called from timeline component)\n   */\n  setPlayheadPosition(position: number): void {\n    this._playheadPosition.set(position);\n  }\n\n  /**\n   * Start playback\n   */\n  play(tracks: Track[], totalDuration: number): void {\n    if (this._isPlaying()) return;\n\n    this._isPlaying.set(true);\n    this.lastFrameTime = performance.now();\n    this.startPlaybackLoop(tracks, totalDuration);\n  }\n\n  /**\n   * Pause playback\n   */\n  pause(): void {\n    this._isPlaying.set(false);\n    if (this.animationFrameId !== null) {\n      cancelAnimationFrame(this.animationFrameId);\n      this.animationFrameId = null;\n    }\n\n    // Pause all active media\n    for (const activeMedia of this.activeMediaMap.values()) {\n      if (activeMedia.element instanceof HTMLVideoElement ||\n          activeMedia.element instanceof HTMLAudioElement) {\n        activeMedia.element.pause();\n      }\n    }\n  }\n\n  /**\n   * Stop playback and reset position\n   */\n  stop(): void {\n    this.pause();\n    this._playheadPosition.set(0);\n    this.cleanupAllMedia();\n  }\n\n  /**\n   * Main playback loop - advances playhead and synchronizes media\n   */\n  private startPlaybackLoop(tracks: Track[], totalDuration: number): void {\n    const animate = (currentTime: number) => {\n      if (!this._isPlaying()) return;\n\n      // Calculate delta time\n      const deltaTime = currentTime - this.lastFrameTime;\n      this.lastFrameTime = currentTime;\n\n      // Update playhead position\n      let newPosition = this._playheadPosition() + deltaTime;\n\n      // Check if we've reached the end\n      if (newPosition >= totalDuration) {\n        newPosition = totalDuration;\n        this.pause();\n      }\n\n      this._playheadPosition.set(newPosition);\n\n      // Synchronize media with new position\n      this.synchronizeMedia(tracks, newPosition);\n\n      // Render to canvas\n      this.renderToCanvas();\n\n      // Continue animation loop\n      if (this._isPlaying()) {\n        this.animationFrameId = requestAnimationFrame(animate);\n      }\n    };\n\n    this.animationFrameId = requestAnimationFrame(animate);\n  }\n\n  /**\n   * Synchronize media elements with the current playhead position.\n   * Start/stop media as playhead enters/exits their time range.\n   */\n  private synchronizeMedia(tracks: Track[], playheadTime: number): void {\n    // Collect all items that should be active at current time\n    const shouldBeActive = new Map<string, { item: MediaItem; trackOrder: number }>();\n\n    for (const track of tracks) {\n      for (const item of track.items) {\n        const itemEnd = item.startTime + item.duration;\n\n        // Check if playhead is within item's time range\n        if (playheadTime >= item.startTime && playheadTime < itemEnd) {\n          // Skip placeholders without URL\n          if (item.isPlaceholder || !item.url) continue;\n\n          shouldBeActive.set(item.id, { item, trackOrder: track.order });\n        }\n      }\n    }\n\n    // Stop media that should no longer be active\n    for (const [id, activeMedia] of this.activeMediaMap.entries()) {\n      if (!shouldBeActive.has(id)) {\n        this.stopMedia(activeMedia);\n        this.activeMediaMap.delete(id);\n      }\n    }\n\n    // Start or update media that should be active\n    for (const [id, { item, trackOrder }] of shouldBeActive.entries()) {\n      if (!this.activeMediaMap.has(id)) {\n        // Start new media\n        this.startMedia(item, trackOrder, playheadTime);\n      } else {\n        // Update existing media position if needed\n        this.updateMediaPosition(this.activeMediaMap.get(id)!, playheadTime);\n      }\n    }\n  }\n\n  /**\n   * Start playing a media item\n   */\n  private startMedia(item: MediaItem, trackOrder: number, playheadTime: number): void {\n    if (!item.url) return;\n\n    const mediaStartTime = item.mediaStartTime || 0;\n    const offsetInItem = playheadTime - item.startTime;\n    const mediaTime = (mediaStartTime + offsetInItem) / 1000; // Convert to seconds\n\n    let element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n\n    switch (item.type) {\n      case MediaType.VIDEO:\n        element = document.createElement('video');\n        (element as HTMLVideoElement).src = item.url;\n        (element as HTMLVideoElement).currentTime = mediaTime;\n        (element as HTMLVideoElement).muted = false;\n        (element as HTMLVideoElement).play().catch(() => {\n          // Autoplay may be blocked, try muted\n          (element as HTMLVideoElement).muted = true;\n          (element as HTMLVideoElement).play().catch(() => {});\n        });\n        break;\n\n      case MediaType.AUDIO:\n        element = document.createElement('audio');\n        (element as HTMLAudioElement).src = item.url;\n        (element as HTMLAudioElement).currentTime = mediaTime;\n        (element as HTMLAudioElement).play().catch(() => {});\n        break;\n\n      case MediaType.IMAGE:\n        element = document.createElement('img');\n        (element as HTMLImageElement).src = item.url;\n        (element as HTMLImageElement).crossOrigin = 'anonymous';\n        break;\n\n      default:\n        return;\n    }\n\n    // For video, also set crossOrigin for canvas rendering\n    if (element instanceof HTMLVideoElement) {\n      element.crossOrigin = 'anonymous';\n    }\n\n    this.activeMediaMap.set(item.id, { item, element, trackOrder });\n  }\n\n  /**\n   * Stop and cleanup a media element\n   */\n  private stopMedia(activeMedia: ActiveMedia): void {\n    const { element } = activeMedia;\n\n    if (element instanceof HTMLVideoElement || element instanceof HTMLAudioElement) {\n      element.pause();\n      element.src = '';\n      element.load();\n    }\n  }\n\n  /**\n   * Update media playback position if it's out of sync\n   */\n  private updateMediaPosition(activeMedia: ActiveMedia, playheadTime: number): void {\n    const { item, element } = activeMedia;\n\n    if (element instanceof HTMLVideoElement || element instanceof HTMLAudioElement) {\n      const mediaStartTime = item.mediaStartTime || 0;\n      const offsetInItem = playheadTime - item.startTime;\n      const expectedMediaTime = (mediaStartTime + offsetInItem) / 1000;\n      const currentMediaTime = element.currentTime;\n\n      // If more than 0.3 seconds out of sync, seek to correct position\n      if (Math.abs(currentMediaTime - expectedMediaTime) > 0.3) {\n        element.currentTime = expectedMediaTime;\n      }\n    }\n  }\n\n  /**\n   * Render active media to canvas with proper layering\n   */\n  private renderToCanvas(): void {\n    if (!this.canvas || !this.canvasContext) return;\n\n    const ctx = this.canvasContext;\n    const canvasWidth = this.canvas.width;\n    const canvasHeight = this.canvas.height;\n\n    // Clear canvas\n    ctx.fillStyle = '#1a1a1a';\n    ctx.fillRect(0, 0, canvasWidth, canvasHeight);\n\n    // Get active media sorted by track order (lower order = bottom layer)\n    const sortedMedia = Array.from(this.activeMediaMap.values())\n      .sort((a, b) => a.trackOrder - b.trackOrder);\n\n    // Render each media item\n    for (const activeMedia of sortedMedia) {\n      this.renderMediaItem(activeMedia, ctx, canvasWidth, canvasHeight);\n    }\n  }\n\n  /**\n   * Render a single media item to canvas with proper scaling\n   */\n  private renderMediaItem(\n    activeMedia: ActiveMedia,\n    ctx: CanvasRenderingContext2D,\n    canvasWidth: number,\n    canvasHeight: number\n  ): void {\n    const { element, item } = activeMedia;\n\n    // Only render video and image types\n    if (item.type === MediaType.AUDIO) return;\n\n    let source: CanvasImageSource | null = null;\n    let sourceWidth = 0;\n    let sourceHeight = 0;\n\n    if (element instanceof HTMLVideoElement) {\n      // Check if video has loaded enough to render\n      if (element.readyState < 2) return;\n      source = element;\n      sourceWidth = element.videoWidth;\n      sourceHeight = element.videoHeight;\n    } else if (element instanceof HTMLImageElement) {\n      // Check if image is loaded\n      if (!element.complete || element.naturalWidth === 0) return;\n      source = element;\n      sourceWidth = element.naturalWidth;\n      sourceHeight = element.naturalHeight;\n    }\n\n    if (!source || sourceWidth === 0 || sourceHeight === 0) return;\n\n    // Calculate scaled dimensions maintaining aspect ratio\n    const { width, height, x, y } = this.calculateScaledDimensions(\n      sourceWidth,\n      sourceHeight,\n      canvasWidth,\n      canvasHeight\n    );\n\n    // Draw the media\n    ctx.drawImage(source, x, y, width, height);\n  }\n\n  /**\n   * Calculate dimensions for media that fit within canvas while preserving aspect ratio\n   */\n  private calculateScaledDimensions(\n    sourceWidth: number,\n    sourceHeight: number,\n    canvasWidth: number,\n    canvasHeight: number\n  ): { width: number; height: number; x: number; y: number } {\n    const sourceAspect = sourceWidth / sourceHeight;\n    const canvasAspect = canvasWidth / canvasHeight;\n\n    let width: number;\n    let height: number;\n\n    if (sourceAspect > canvasAspect) {\n      // Source is wider - fit to width\n      width = canvasWidth;\n      height = canvasWidth / sourceAspect;\n    } else {\n      // Source is taller - fit to height\n      height = canvasHeight;\n      width = canvasHeight * sourceAspect;\n    }\n\n    // Center the media\n    const x = (canvasWidth - width) / 2;\n    const y = (canvasHeight - height) / 2;\n\n    return { width, height, x, y };\n  }\n\n  /**\n   * Cleanup all active media\n   */\n  private cleanupAllMedia(): void {\n    for (const activeMedia of this.activeMediaMap.values()) {\n      this.stopMedia(activeMedia);\n    }\n    this.activeMediaMap.clear();\n  }\n\n  /**\n   * Seek to a specific position and update media accordingly\n   */\n  seek(tracks: Track[], position: number): void {\n    this._playheadPosition.set(position);\n\n    // Update all active media positions\n    for (const activeMedia of this.activeMediaMap.values()) {\n      const { item, element } = activeMedia;\n      const itemEnd = item.startTime + item.duration;\n\n      // Check if media should still be active at new position\n      if (position < item.startTime || position >= itemEnd) {\n        // Media should no longer be active\n        this.stopMedia(activeMedia);\n        this.activeMediaMap.delete(item.id);\n      } else if (element instanceof HTMLVideoElement || element instanceof HTMLAudioElement) {\n        // Seek to correct position in media\n        const mediaStartTime = item.mediaStartTime || 0;\n        const offsetInItem = position - item.startTime;\n        element.currentTime = (mediaStartTime + offsetInItem) / 1000;\n      }\n    }\n\n    // Synchronize to add any new media that should be active\n    this.synchronizeMedia(tracks, position);\n\n    // Render current frame\n    this.renderToCanvas();\n  }\n\n  /**\n   * Force render the current state to canvas (useful when paused)\n   */\n  renderCurrentFrame(): void {\n    this.renderToCanvas();\n  }\n}\n",
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[2025-12-05T11:45:42.728Z] [INFO] {
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        "text": "Perfect! I found the issue. The problem is in the `PlaybackService.startMedia()` method at lines 197-208. When media is started, it immediately calls `.play()` on the video/audio elements. This happens in the `synchronizeMedia()` method which is called during the playback loop, but also when seeking.\n\nLet me check where and how media is being loaded when added to the timeline:"
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[2025-12-05T11:45:44.177Z] [INFO] {
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[2025-12-05T11:45:45.092Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01TA3Y8Mrk6FG65b7fd8pU28","type":"tool_result","content":"     1→import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect } from '@angular/core';\n     2→import { CommonModule } from '@angular/common';\n     3→import { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\n     4→import { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\n     5→import { Media***********onent } from '../media-toolbar/media-toolbar.component';\n     6→import { Notif************onent } from '../notifications/notifications.component';\n     7→import { Timel*************rvice } from '../../services/timeline-drag-drop.service';\n     8→import { PlaybackService } from '../../services/playback.service';\n     9→\n    10→@Component({\n    11→  selector: 'app-timeline',\n    12→  standalone: true,\n    13→  imports: [CommonModule, MediaLibraryComponent, MediaToolbarComponent, NotificationsComponent],\n    14→  templateUrl: './timeline.component.html',\n    15→  styleUrl: './timeline.component.css'\n    16→})\n    17→export class TimelineComponent implements AfterViewInit, OnDestroy {\n    18→  // Zoom levels: pixels per second\n    19→  private readonly MIN_ZOOM = 10;\n    20→  private readonly MAX_ZOOM = 200;\n    21→  private readonly ZOOM_STEP = 20;\n    22→  readonly TRACK_HEADER_WIDTH = 150; // Width of track header in pixels\n    23→  private readonly SNAP_PROXIMITY_MS = 500; // Snap to item if playhead is within 500ms\n    24→  private readonly MIN_ITEM_DURATION = 100; // Minimum item duration in milliseconds\n    25→\n    26→  // Canvas dimensions for preview\n    27→  readonly PREVIEW_WIDTH = 640;\n    28→  readonly PREVIEW_HEIGHT = 360;\n    29→\n    30→  // View references\n    31→  @ViewChild('timelineRuler') timelineRuler?: ElementRef<HTMLElement>;\n    32→  @ViewChild('notifications') notificationsComponent?: NotificationsComponent;\n    33→  @ViewChild('previewCanvas') previewCanvas?: ElementRef<HTMLCanvasElement>;\n    34→\n    35→  // Timeline state\n    36→  readonly state = signal<TimelineState>({\n    37→    tracks: [\n    38→      { id: '1', name: 'Track 1', order: 0, items: [] },\n    39→      { id: '2', name: 'Track 2', order: 1, items: [] }\n    40→    ],\n    41→    playheadPosition: 0,\n    42→    zoomLevel: 50, // pixels per second\n    43→    totalDuration: 120000, // 120 seconds in milliseconds\n    44→    selectedItemId: null\n    45→  });\n    46→\n    47→  // Computed values\n    48→  readonly pixel**********econd = computed(() => {\n    49→    return this.state().zoomLevel / 1000;\n    50→  });\n    51→\n    52→  readonly timelineWidth = computed(() => {\n    53→    const state = this.state();\n    54→    // Calculate the maximum end time across all tracks\n    55→    let maxEndTime = state.totalDuration;\n    56→\n    57→    for (const track of state.tracks) {\n    58→      for (const item of track.items) {\n    59→        const itemEndTime = item.startTime + item.duration;\n    60→        if (itemEndTime > maxEndTime) {\n    61→          maxEndTime = itemEndTime;\n    62→        }\n    63→      }\n    64→    }\n    65→\n    66→    return maxEndTime * this.pixelsPerMillisecond();\n    67→  });\n    68→\n    69→  readonly timelineLineHeight = computed(() => {\n    70→    const state = this.state();\n    71→    return state.tracks.length * 60 + 32;\n    72→  });\n    73→\n    74→  readonly playheadPosition = computed(() => {\n    75→    return this.state().playheadPosition * this.pixelsPerMillisecond();\n    76→  });\n    77→\n    78→  readonly playh************ition = computed(() => {\n    79→    return this.playheadPosition() + this.TRACK_HEADER_WIDTH;\n    80→  });\n    81→\n    82→  // Computed: whether a media item is currently selected\n    83→  readonly hasSelectedItem = computed(() => {\n    84→    return this.state().selectedItemId !== null;\n    85→  });\n    86→\n    87→  // Dragging state\n    88→  private draggedItem: MediaItem | null = null;\n    89→  private draggedItemOriginalTrackId: string | null = null;\n    90→  private dragOffsetTime: number = 0; // Offset in milliseconds from item start to cursor position\n    91→  private isDraggingPlayhead = false;\n    92→  private isDraggingFromRuler = false;\n    93→  private resizingItem: { item: MediaItem; edge: 'left' | 'right' } | null = null;\n    94→  private mouseDownPosition: { x: number; y: number } | null = null; // Track mouse down position for click detection\n    95→\n    96→  // Video preview state\n    97→  readonly isPlaying = signal<boolean>(false);\n    98→\n    99→  // Duration editor state\n   100→  readonly showDurationEditor = signal<boolean>(false);\n   101→  private editedDuration: number = 120; // Duration in seconds\n   102→\n   103→  // Media library state\n   104→  readonly showMediaLibrary = signal<boolean>(false);\n   105→  private mediaLibraryTargetTrackId: string | null = null;\n   106→\n   107→  // Clipboard state for copy/paste functionality\n   108→  private readonly clipboardItem = signal<MediaItem | null>(null);\n   109→  private readonly clipb************ackId = signal<string | null>(null);\n   110→\n   111→  // Computed: whether a media item is in clipboard\n   112→  readonly hasClipboardItem = computed(() => {\n   113→    return this.clipboardItem() !== null;\n   114→  });\n   115→\n   116→  // Render loop ID for cleanup\n   117→  private renderLoopId: number | null = null;\n   118→\n   119→  constructor(\n   120→    private dragDropService: TimelineDragDropService,\n   121→    public playbackService: PlaybackService\n   122→  ) {\n   123→    // Effect to sync playhead position from PlaybackService during playback\n   124→    effect(() => {\n   125→      if (this.playbackService.isPlaying()) {\n   126→        const position = this.playbackService.playheadPosition();\n   127→        this.state.update(s => ({\n   128→          ...s,\n   129→          playheadPosition: position\n   130→        }));\n   131→      }\n   132→    });\n   133→  }\n   134→\n   135→  ngAfterViewInit(): void {\n   136→    // Initialize canvas for preview rendering\n   137→    if (this.previewCanvas) {\n   138→      this.playbackService.setCanvas(this.previewCanvas.nativeElement);\n   139→    }\n   140→\n   141→    // Start continuous render loop for preview (renders current frame even when paused)\n   142→    this.startRenderLoop();\n   143→  }\n   144→\n   145→  ngOnDestroy(): void {\n   146→    // Clean up render loop\n   147→    if (this.renderLoopId !== null) {\n   148→      cancelAnimationFrame(this.renderLoopId);\n   149→      this.renderLoopId = null;\n   150→    }\n   151→\n   152→    // Stop playback\n   153→    this.playbackService.stop();\n   154→  }\n   155→\n   156→  /**\n   157→   * Continuous render loop for preview canvas.\n   158→   * Keeps rendering even when paused so seeking updates the preview.\n   159→   */\n   160→  private startRenderLoop(): void {\n   161→    const render = () => {\n   162→      // Only render if we have active media and are not playing\n   163→      // (PlaybackService handles rendering during playback)\n   164→      if (!this.playbackService.isPlaying()) {\n   165→        this.playbackService.renderCurrentFrame();\n   166→      }\n   167→      this.renderLoopId = requestAnimationFrame(render);\n   168→    };\n   169→    this.renderLoopId = requestAnimationFrame(render);\n   170→  }\n   171→\n   172→  // Track management\n   173→  addTrack(): void {\n   174→    const currentState = this.state();\n   175→    const newTrack: Track = {\n   176→      id: `track-${Date.now()}`,\n   177→      name: `Track ${currentState.tracks.length + 1}`,\n   178→      order: currentState.tracks.length,\n   179→      items: []\n   180→    };\n   181→\n   182→    this.state.update(s => ({\n   183→      ...s,\n   184→      tracks: [...s.tracks, newTrack]\n   185→    }));\n   186→  }\n   187→\n   188→  removeTrack(trackId: string): void {\n   189→    const currentState = this.state();\n   190→    if (currentState.tracks.length <= 1) {\n   191→      return; // Keep at least one track\n   192→    }\n   193→\n   194→    this.state.update(s => ({\n   195→      ...s,\n   196→      tracks: s.tracks.filter(t => t.id !== trackId)\n   197→    }));\n   198→  }\n   199→\n   200→  // Zoom controls\n   201→  zoomIn(): void {\n   202→    this.state.update(s => ({\n   203→      ...s,\n   204→      zoomLevel: Math.min(s.zoomLevel + this.ZOOM_STEP, this.MAX_ZOOM)\n   205→    }));\n   206→  }\n   207→\n   208→  zoomOut(): void {\n   209→    this.state.update(s => ({\n   210→      ...s,\n   211→      zoomLevel: Math.max(s.zoomLevel - this.ZOOM_STEP, this.MIN_ZOOM)\n   212→    }));\n   213→  }\n   214→\n   215→  // Utility method to extract coordinates from mouse or touch events\n   216→  private getEventCoordinates(event: MouseEvent | TouchEvent): { clientX: number; clientY: number } {\n   217→    if (event instanceof MouseEvent) {\n   218→      return { clientX: event.clientX, clientY: event.clientY };\n   219→    } else {\n   220→      const touch = event.touches[0] || event.changedTouches[0];\n   221→      return { clientX: touch.clientX, clientY: touch.clientY };\n   222→    }\n   223→  }\n   224→\n   225→  // Playhead controls\n   226→  onRulerPointerDown(event: MouseEvent | TouchEvent): void {\n   227→    event.preventDefault();\n   228→    this.isDraggingFromRuler = true;\n   229→\n   230→    // Immediately update position on pointer down\n   231→    const target = event.currentTarget as HTMLElement;\n   232→    const rect = target.getBoundingClientRect();\n   233→    const coords = this.getEventCoordinates(event);\n   234→    // Calculate position within the ruler element\n   235→    // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n   236→    const x = coords.clientX - rect.left;\n   237→    const newPosition = x / this.pixelsPerMillisecond();\n   238→    const currentState = this.state();\n   239→    const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n   240→\n   241→    this.state.update(s => ({\n   242→      ...s,\n   243→      playheadPosition: clampedPosition\n   244→    }));\n   245→\n   246→    // Sync position to playback service for seeking\n   247→    this.playbackService.seek(currentState.tracks, clampedPosition);\n   248→  }\n   249→\n   250→  onPlayheadPointerDown(event: MouseEvent | TouchEvent): void {\n   251→    event.preventDefault();\n   252→    event.stopPropagation();\n   253→    this.isDraggingPlayhead = true;\n   254→  }\n   255→\n   256→\n   257→  // Media item drag and drop\n   258→  onMediaItemPointerDown(event: MouseEvent | TouchEvent, item: MediaItem, track: Track): void {\n   259→    const target = event.target as HTMLElement;\n   260→\n   261→    // Check if clicking/touching on resize handle\n   262→    if (target.classList.contains('resize-handle')) {\n   263→      this.resizingItem = {\n   264→        item,\n   265→        edge: target.classList.contains('resize-handle-left') ? 'left' : 'right'\n   266→      };\n   267→      event.preventDefault();\n   268→      return;\n   269→    }\n   270→\n   271→    const coords = this.getEventCoordinates(event);\n   272→    this.mouseDownPosition = { x: coords.clientX, y: coords.clientY };\n   273→\n   274→    const mediaItemElement = event.currentTarget as HTMLElement;\n   275→    const rect = mediaItemElement.getBoundingClientRect();\n   276→    const clickX = coords.clientX - rect.left;\n   277→\n   278→    // Convert pixel offset to time offset\n   279→    this.dragOffsetTime = clickX / this.pixelsPerMillisecond();\n   280→\n   281→    this.draggedItem = item;\n   282→    this.draggedItemOriginalTrackId = track.id;\n   283→    event.preventDefault();\n   284→  }\n   285→\n   286→  onTrackPointerDown(event: MouseEvent | TouchEvent): void {\n   287→    // Deselect when clicking/touching track background (not on media item)\n   288→    const target = event.target as HTMLElement;\n   289→    if (target.classList.contains('track')) {\n   290→      this.deselectMediaItem();\n   291→    }\n   292→  }\n   293→\n   294→  onTrackPointerMove(event: MouseEvent | TouchEvent, track: Track): void {\n   295→    if (this.resizingItem) {\n   296→      this.handleResize(event, track);\n   297→      return;\n   298→    }\n   299→    event.preventDefault();\n   300→    event.stopPropagation();\n   301→\n   302→    if (!this.draggedItem) return;\n   303→\n   304→    const coords = this.getEventCoordinates(event);\n   305→    const target = event.currentTarget as HTMLElement;\n   306→    const rect = target.getBoundingClientRect();\n   307→    const x = coords.clientX - rect.left;\n   308→    const requestedStartTime = Math.max(0, x / this.pixelsPerMillisecond() - this.dragOffsetTime);\n   309→\n   310→    this.state.update(s => {\n   311→      const updatedTracks = s.tracks.map(t => {\n   312→        if (t.id === track.id) {\n   313→          // Get all items except the dragged one for collision detection\n   314→          const otherItems = t.items.filter(i => i.id !== this.draggedItem!.id);\n   315→\n   316→          // Fix for issue #81: Find snap targets (playhead and items on all tracks)\n   317→          const snapTargets = this.dragDropService.findSnapTargets(\n   318→            this.draggedItem!.id,\n   319→            s.tracks,\n   320→            s.playheadPosition\n   321→          );\n   322→\n   323→          // Calculate valid position and duration considering collisions, gap fitting, and snapping\n   324→          const validPosition = this.dragDropService.getValidDragPosition(\n   325→            this.draggedItem!,\n   326→            requestedStartTime,\n   327→            otherItems,\n   328→            s.totalDuration,\n   329→            snapTargets\n   330→          );\n   331→\n   332→          // Check if item already exists in this track\n   333→          const itemExists = t.items.some(i => i.id === this.draggedItem!.id);\n   334→\n   335→          if (itemExists) {\n   336→            // Update position and duration in current track\n   337→            return {\n   338→              ...t,\n   339→              items: t.items.map(i =>\n   340→                i.id === this.draggedItem!.id\n   341→                  ? {\n   342→                      ...i,\n   343→                      startTime: validPosition.startTime,\n   344→                      duration: validPosition.duration,\n   345→                      trackId: track.id\n   346→                    }\n   347→                  : i\n   348→              )\n   349→            };\n   350→          } else {\n   351→            // Add to new track with adjusted position and duration\n   352→            return {\n   353→              ...t,\n   354→              items: [\n   355→                ...otherItems,\n   356→                {\n   357→                  ...this.draggedItem!,\n   358→                  startTime: validPosition.startTime,\n   359→                  duration: validPosition.duration,\n   360→                  trackId: track.id\n   361→                }\n   362→              ]\n   363→            };\n   364→          }\n   365→        } else if (t.id === this.draggedItemOriginalTrackId && t.id !== track.id) {\n   366→          // Remove from original track only if moving to different track\n   367→          return {\n   368→            ...t,\n   369→            items: t.items.filter(i => i.id !== this.draggedItem!.id)\n   370→          };\n   371→        }\n   372→        return t;\n   373→      });\n   374→\n   375→      // Update the original track ID to current track for smooth dragging within same track\n   376→      this.draggedItemOriginalTrackId = track.id;\n   377→\n   378→      return { ...s, tracks: updatedTracks };\n   379→    });\n   380→  }\n   381→\n   382→  private handleResize(event: MouseEvent | TouchEvent, track: Track): void {\n   383→    if (!this.resizingItem) return;\n   384→\n   385→    const coords = this.getEventCoordinates(event);\n   386→    const target = event.currentTarget as HTMLElement;\n   387→    const rect = target.getBoundingClientRect();\n   388→    // Fix for issue #83: getBoundingClientRect() returns viewport-relative coordinates,\n   389→    // and coords.clientX is also viewport-relative, so we don't need to add scrollLeft\n   390→    const x = coords.clientX - rect.left;\n   391→    const timeAtCursor = x / this.pixelsPerMillisecond();\n   392→\n   393→    this.state.update(s => {\n   394→      // Fix for issue #87: Find snap targets for resize operations\n   395→      const snapTargets = this.dragDropService.findSnapTargets(\n   396→        this.resizingItem!.item.id,\n   397→        s.tracks,\n   398→        s.playheadPosition\n   399→      );\n   400→\n   401→      const updatedTracks = s.tracks.map(t => {\n   402→        if (t.id === track.id) {\n   403→          // Get resize bounds considering adjacent items\n   404→          const bounds = this.dragDropService.getResizeBounds(\n   405→            this.resizingItem!.item,\n   406→            t.items,\n   407→            this.resizingItem!.edge,\n   408→            s.totalDuration\n   409→          );\n   410→\n   411→          return {\n   412→            ...t,\n   413→            items: t.items.map(i => {\n   414→              if (i.id === this.resizingItem!.item.id) {\n   415→                if (this.resizingItem!.edge === 'left') {\n   416→                  // Fix for issue #89: Handle mediaStartTime when resizing from left\n   417→                  // Apply snapping to left edge (start time)\n   418→                  let newStartTime = Math.max(\n   419→                    bounds.minTime,\n   420→                    Math.min(timeAtCursor, bounds.maxTime)\n   421→                  );\n   422→\n   423→                  // Apply snapping if within snap distance\n   424→                  let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n   425→                  for (const target of snapTargets) {\n   426→                    const distance = Math.abs(newStartTime - target);\n   427→                    if (distance < minDistance) {\n   428→                      minDistance = distance;\n   429→                      // Only snap if within bounds\n   430→                      if (target >= bounds.minTime && target <= bounds.maxTime) {\n   431→                        newStartTime = target;\n   432→                      }\n   433→                    }\n   434→                  }\n   435→\n   436→                  // Calculate how much the timeline position is changing\n   437→                  const deltaTime = newStartTime - i.startTime;\n   438→                  const newDuration = i.duration - deltaTime;\n   439→\n   440→                  // Update media start time (trimming from source media)\n   441→                  const curre***********tTime = i.mediaStartTime || 0;\n   442→                  const newMediaStartTime = curre***********tTime + deltaTime;\n   443→\n   444→                  // Check if we're trying to extend beyond the start of source media\n   445→                  if (newMediaStartTime < 0) {\n   446→                    // Can only extend left by curre***********tTime amount\n   447→                    const maxExtension = currentMediaStartTime;\n   448→                    const finalStartTime = i.startTime - maxExtension;\n   449→                    const finalDuration = i.duration + maxExtension;\n   450→\n   451→                    // Ensure we don't exceed maxDuration\n   452→                    if (i.maxDuration && finalDuration > i.maxDuration) {\n   453→                      return {\n   454→                        ...i,\n   455→                        startTime: finalStartTime + (finalDuration - i.maxDuration),\n   456→                        duration: i.maxDuration,\n   457→                        mediaStartTime: 0\n   458→                      };\n   459→                    }\n   460→\n   461→                    return {\n   462→                      ...i,\n   463→                      startTime: finalStartTime,\n   464→                      duration: finalDuration,\n   465→                      mediaStartTime: 0\n   466→                    };\n   467→                  }\n   468→\n   469→                  // Ensure media end doesn't exceed maxDuration\n   470→                  if (i.maxDuration && newMediaStartTime + newDuration > i.maxDuration) {\n   471→                    const maxAllowedDuration = i.maxDuration - newMediaStartTime;\n   472→                    return {\n   473→                      ...i,\n   474→                      startTime: i.startTime + (i.duration - maxAllowedDuration),\n   475→                      duration: maxAllowedDuration,\n   476→                      mediaStartTime: newMediaStartTime\n   477→                    };\n   478→                  }\n   479→\n   480→                  return {\n   481→                    ...i,\n   482→                    startTime: newStartTime,\n   483→                    duration: newDuration,\n   484→                    mediaStartTime: newMediaStartTime\n   485→                  };\n   486→                } else {\n   487→                  // Fix for issue #87: Apply snapping to right edge (end time)\n   488→                  let newEndTime = Math.max(\n   489→                    bounds.minTime,\n   490→                    Math.min(timeAtCursor, bounds.maxTime)\n   491→                  );\n   492→\n   493→                  // Apply snapping if within snap distance\n   494→                  let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n   495→                  for (const target of snapTargets) {\n   496→                    const distance = Math.abs(newEndTime - target);\n   497→                    if (distance < minDistance) {\n   498→                      minDistance = distance;\n   499→                      // Only snap if within bounds\n   500→                      if (target >= bounds.minTime && target <= bounds.maxTime) {\n   501→                        newEndTime = target;\n   502→                      }\n   503→                    }\n   504→                  }\n   505→\n   506→                  const newDuration = newEndTime - i.startTime;\n   507→\n   508→                  // Limit duration by maxDuration if specified\n   509→                  const limitedDuration = i.maxDuration\n   510→                    ? Math.min(newDuration, i.maxDuration)\n   511→                    : newDuration;\n   512→\n   513→                  return { ...i, duration: limitedDuration };\n   514→                }\n   515→              }\n   516→              return i;\n   517→            })\n   518→          };\n   519→        }\n   520→        return t;\n   521→      });\n   522→\n   523→      return { ...s, tracks: updatedTracks };\n   524→    });\n   525→  }\n   526→\n   527→  onPointerUp(event: MouseEvent | TouchEvent): void {\n   528→    // Detect if this was a click/tap (not a drag) on a media item\n   529→    if (this.draggedItem && this.mouseDownPosition) {\n   530→      const coords = this.getEventCoordinates(event);\n   531→      const dx = coords.clientX - this.mouseDownPosition.x;\n   532→      const dy = coords.clientY - this.mouseDownPosition.y;\n   533→      const distance = Math.sqrt(dx * dx + dy * dy);\n   534→\n   535→      // If pointer moved less than 5 pixels, consider it a click/tap\n   536→      if (distance < 5) {\n   537→        this.selectMediaItem(this.draggedItem.id);\n   538→      }\n   539→    }\n   540→\n   541→    this.draggedItem = null;\n   542→    this.draggedItemOriginalTrackId = null;\n   543→    this.dragOffsetTime = 0;\n   544→    this.isDraggingPlayhead = false;\n   545→    this.isDraggingFromRuler = false;\n   546→    this.resizingItem = null;\n   547→    this.mouseDownPosition = null;\n   548→  }\n   549→\n   550→  onDocumentPointerMove(event: MouseEvent | TouchEvent): void {\n   551→    if (this.isDraggingPlayhead || this.isDraggingFromRuler) {\n   552→      // Fix for issue #50: Use ViewChild reference to ensure we use the exact same element as onRulerPointerDown\n   553→      if (!this.timelineRuler) {\n   554→        return;\n   555→      }\n   556→\n   557→      const coords = this.getEventCoordinates(event);\n   558→      const rulerElement = this.timelineRuler.nativeElement;\n   559→      // Use the same calculation as onRulerPointerDown\n   560→      // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n   561→      const rect = rulerElement.getBoundingClientRect();\n   562→      const x = coords.clientX - rect.left;\n   563→      const newPosition = x / this.pixelsPerMillisecond();\n   564→      const currentState = this.state();\n   565→      const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n   566→\n   567→      this.state.update(s => ({\n   568→        ...s,\n   569→        playheadPosition: clampedPosition\n   570→      }));\n   571→\n   572→      // Sync position to playback service for seeking (but don't call too frequently during drag)\n   573→      this.playbackService.seek(currentState.tracks, clampedPosition);\n   574→    }\n   575→\n   576→    // Fix for issue #96: Handle media item dragging and resizing at document level for touch events\n   577→    // This allows dragging between tracks on mobile devices\n   578→    if (event instanceof TouchEvent) {\n   579→      if (this.draggedItem) {\n   580→        // Find which track the touch is currently over\n   581→        const targetTrack = this.findTrackAtCoordinates(this.getEventCoordinates(event));\n   582→        if (targetTrack) {\n   583→          // Reuse existing drag logic\n   584→          this.onTrackPointerMove(event, targetTrack);\n   585→        }\n   586→      } else if (this.resizingItem) {\n   587→        // Find the track that contains the resizing item\n   588→        const targetTrack = this.findTrackContainingItem(this.resizingItem.item.id);\n   589→        if (targetTrack) {\n   590→          // Reuse existing resize logic\n   591→          this.handleResize(event, targetTrack);\n   592→        }\n   593→      }\n   594→    }\n   595→  }\n   596→\n   597→  // Helper method to find which track is at the given Y coordinate\n   598→  private findTrackAtCoordinates(coords: { clientX: number; clientY: number }): Track | null {\n   599→    const trackElements = document.querySelectorAll('.track');\n   600→    for (const trackElement of Array.from(trackElements)) {\n   601→      const rect = trackElement.getBoundingClientRect();\n   602→      if (coords.clientY >= rect.top && coords.clientY <= rect.bottom) {\n   603→        const trackIndex = Array.from(trackElements).indexOf(trackElement);\n   604→        const tracks = this.state().tracks;\n   605→        if (trackIndex >= 0 && trackIndex < tracks.length) {\n   606→          return tracks[trackIndex];\n   607→        }\n   608→      }\n   609→    }\n   610→    return null;\n   611→  }\n   612→\n   613→  // Helper method to find the track containing a specific item\n   614→  private findTrackContainingItem(itemId: string): Track | null {\n   615→    const currentState = this.state();\n   616→    for (const track of currentState.tracks) {\n   617→      if (track.items.some(item => item.id === itemId)) {\n   618→        return track;\n   619→      }\n   620→    }\n   621→    return null;\n   622→  }\n   623→\n   624→  // Helper methods\n   625→  getItemStyle(item: MediaItem) {\n   626→    return {\n   627→      left: `${item.startTime * this.pixelsPerMillisecond()}px`,\n   628→      width: `${item.duration * this.pixelsPerMillisecond()}px`\n   629→    };\n   630→  }\n   631→\n   632→  getMediaTypeClass(type: MediaType): string {\n   633→    return `media-${type}`;\n   634→  }\n   635→\n   636→  formatTime(milliseconds: number): string {\n   637→    const seconds = Math.floor(milliseconds / 1000);\n   638→    const minutes = Math.floor(seconds / 60);\n   639→    const remainingSeconds = seconds % 60;\n   640→    const cs = Math.floor((milliseconds % 1000) / 10);\n   641→    return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}.${cs.toString().padStart(2, '0')}`;\n   642→  }\n   643→\n   644→  /**\n   645→   * Calculate appropriate time interval for markers based on zoom level\n   646→   * to prevent marker labels from overlapping\n   647→   */\n   648→  private getMarkerInterval(): number {\n   649→    // Minimum spacing between markers in pixels to prevent overlap\n   650→    // Enough space for \"0:00.000\" text (about 50-60px)\n   651→    const MIN_M***********NG_PX = 60;\n   652→\n   653→    // Calculate how much time represents MIN_M***********NG_PX at current zoom\n   654→    const pixelsPerMs = this.pixelsPerMillisecond();\n   655→    const minTimeSpacing = MIN_M***********NG_PX / pixelsPerMs;\n   656→\n   657→    // Define possible intervals (in ms): 100ms, 250ms, 500ms, 1s, 2s, 5s, 10s, 30s, 60s\n   658→    const intervals = [100, 250, 500, 1000, 2000, 5000, 10000, 30000, 60000];\n   659→\n   660→    // Find the smallest interval that's larger than or equal to minTimeSpacing\n   661→    for (const interval of intervals) {\n   662→      if (interval >= minTimeSpacing) {\n   663→        return interval;\n   664→      }\n   665→    }\n   666→\n   667→    // If even 60s is too small, use larger intervals\n   668→    return Math.ceil(minTimeSpacing / 60000) * 60000;\n   669→  }\n   670→\n   671→  getTimeMarkers(): { position: number; label: string }[] {\n   672→    const markers: { position: number; label: string }[] = [];\n   673→    const stepMs = this.getMarkerInterval(); // Dynamic interval based on zoom level\n   674→\n   675→    // Fix for issue #85: Do not show the last time mark at totalDuration\n   676→    // to prevent container expansion from the text label\n   677→    for (let time = 0; time < this.state().totalDuration; time += stepMs) {\n   678→      markers.push({\n   679→        position: time * this.pixelsPerMillisecond(),\n   680→        label: this.formatTime(time)\n   681→      });\n   682→    }\n   683→\n   684→    return markers;\n   685→  }\n   686→\n   687→  // Add placeholder media item\n   688→  addMediaItem(type: MediaType, trackId: string): void {\n   689→    const currentState = this.state();\n   690→    const track = currentState.tracks.find(t => t.id === trackId);\n   691→\n   692→    if (!track) return;\n   693→\n   694→    const playheadTime = currentState.playheadPosition;\n   695→    const totalDuration = currentState.totalDuration;\n   696→    const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;\n   697→\n   698→    // Determine the start time for the new item using the service\n   699→    const startTime = this.dragDropService.calculateNewItemStartTime(\n   700→      playheadTime,\n   701→      track.items,\n   702→      this.SNAP_PROXIMITY_MS\n   703→    );\n   704→\n   705→    // Fix for issue #48: Ensure new item doesn't exceed totalDuration\n   706→    const maxAllowedDuration = totalDuration - startTime;\n   707→    const finalDuration = Math.min(newItemDuration, maxAllowedDuration);\n   708→\n   709→    // Fix for issue #64: Verify that the new item doesn't overlap with any existing items\n   710→    const testItem: MediaItem = {\n   711→      id: 'temp',\n   712→      type,\n   713→      startTime,\n   714→      duration: finalDuration,\n   715→      trackId,\n   716→      name: '',\n   717→      isPlaceholder: true\n   718→    };\n   719→\n   720→    // Validate and adjust position if needed\n   721→    const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n   722→\n   723→    // Recalculate duration limit if position was adjusted\n   724→    const adjus****************ation = totalDuration - validatedStartTime;\n   725→    const adjustedDuration = Math.min(newItemDuration, adjustedMaxAllowedDuration);\n   726→\n   727→    // Create the final non-overlapping item\n   728→    const newItem: MediaItem = {\n   729→      id: `item-${Date.now()}`,\n   730→      type,\n   731→      startTime: validatedStartTime,\n   732→      duration: adjustedDuration,\n   733→      trackId,\n   734→      name: `${type} placeholder`,\n   735→      isPlaceholder: true\n   736→    };\n   737→\n   738→    // Set maxDuration for audio and video placeholders\n   739→    if (type === MediaType.VIDEO) {\n   740→      newItem.maxDuration = Math.min(10000, adjustedMaxAllowedDuration); // 10 seconds default for video\n   741→    } else if (type === MediaType.AUDIO) {\n   742→      newItem.maxDuration = Math.min(15000, adjustedMaxAllowedDuration); // 15 seconds default for audio\n   743→    }\n   744→\n   745→    this.state.update(s => ({\n   746→      ...s,\n   747→      tracks: s.tracks.map(t =>\n   748→        t.id === trackId\n   749→          ? { ...t, items: [...t.items, newItem] }\n   750→          : t\n   751→      )\n   752→    }));\n   753→  }\n   754→\n   755→  removeMediaItem(itemId: string, trackId: string): void {\n   756→    this.state.update(s => ({\n   757→      ...s,\n   758→      tracks: s.tracks.map(t =>\n   759→        t.id === trackId\n   760→          ? { ...t, items: t.items.filter(i => i.id !== itemId) }\n   761→          : t\n   762→      ),\n   763→      // Deselect if removing selected item\n   764→      selectedItemId: s.selectedItemId === itemId ? null : s.selectedItemId\n   765→    }));\n   766→  }\n   767→\n   768→  // Media selection\n   769→  selectMediaItem(itemId: string): void {\n   770→    this.state.update(s => ({\n   771→      ...s,\n   772→      selectedItemId: itemId\n   773→    }));\n   774→  }\n   775→\n   776→  deselectMediaItem(): void {\n   777→    this.state.update(s => ({\n   778→      ...s,\n   779→      selectedItemId: null\n   780→    }));\n   781→  }\n   782→\n   783→  isItemSelected(itemId: string): boolean {\n   784→    return this.state().selectedItemId === itemId;\n   785→  }\n   786→\n   787→  readonly MediaType = MediaType;\n   788→\n   789→  // Video preview controls\n   790→  togglePlayback(): void {\n   791→    const currentState = this.state();\n   792→\n   793→    if (this.playbackService.isPlaying()) {\n   794→      this.playbackService.pause();\n   795→      this.isPlaying.set(false);\n   796→    } else {\n   797→      // Sync playhead position to PlaybackService before starting\n   798→      this.playbackService.setPlayheadPosition(currentState.playheadPosition);\n   799→      this.playbackService.play(currentState.tracks, currentState.totalDuration);\n   800→      this.isPlaying.set(true);\n   801→    }\n   802→  }\n   803→\n   804→  skipBackward(): void {\n   805→    const currentState = this.state();\n   806→    const newPosition = Math.max(0, currentState.playheadPosition - 5000);\n   807→\n   808→    this.state.update(s => ({\n   809→      ...s,\n   810→      playheadPosition: newPosition\n   811→    }));\n   812→\n   813→    // Sync position and update media\n   814→    this.playbackService.seek(currentState.tracks, newPosition);\n   815→  }\n   816→\n   817→  skipForward(): void {\n   818→    const currentState = this.state();\n   819→    const newPosition = Math.min(currentState.totalDuration, currentState.playheadPosition + 5000);\n   820→\n   821→    this.state.update(s => ({\n   822→      ...s,\n   823→      playheadPosition: newPosition\n   824→    }));\n   825→\n   826→    // Sync position and update media\n   827→    this.playbackService.seek(currentState.tracks, newPosition);\n   828→  }\n   829→\n   830→  // Duration editor methods\n   831→  openDurationEditor(): void {\n   832→    this.editedDuration = this.state().totalDuration / 1000;\n   833→    this.showDurationEditor.set(true);\n   834→  }\n   835→\n   836→  closeDurationEditor(): void {\n   837→    this.showDurationEditor.set(false);\n   838→  }\n   839→\n   840→  onDurationInputChange(event: Event): void {\n   841→    const input = event.target as HTMLInputElement;\n   842→    const value = parseFloat(input.value);\n   843→    if (!isNaN(value) && value > 0) {\n   844→      this.editedDuration = value;\n   845→    }\n   846→  }\n   847→\n   848→  saveDuration(): void {\n   849→    const newDurationMs = Math.max(1000, this.editedDuration * 1000); // At least 1 second\n   850→    this.state.update(s => ({\n   851→      ...s,\n   852→      totalDuration: newDurationMs,\n   853→      // Ensure playhead doesn't exceed new duration\n   854→      playheadPosition: Math.min(s.playheadPosition, newDurationMs)\n   855→    }));\n   856→    this.closeDurationEditor();\n   857→  }\n   858→\n   859→  // Media library methods\n   860→  openMediaLibrary(trackId: string): void {\n   861→    this.mediaLibraryTargetTrackId = trackId;\n   862→    this.showMediaLibrary.set(true);\n   863→  }\n   864→\n   865→  closeMediaLibrary(): void {\n   866→    this.showMediaLibrary.set(false);\n   867→    this.mediaLibraryTargetTrackId = null;\n   868→  }\n   869→\n   870→  onMediaSelected(media: MediaLibraryItem): void {\n   871→    if (!this.mediaLibraryTargetTrackId) return;\n   872→\n   873→    const currentState = this.state();\n   874→    const track = currentState.tracks.find(t => t.id === this.mediaLibraryTargetTrackId);\n   875→\n   876→    if (!track) return;\n   877→\n   878→    const playheadTime = currentState.playheadPosition;\n   879→    const totalDuration = currentState.totalDuration;\n   880→\n   881→    // Determine the start time for the new item using the service\n   882→    const startTime = this.dragDropService.calculateNewItemStartTime(\n   883→      playheadTime,\n   884→      track.items,\n   885→      this.SNAP_PROXIMITY_MS\n   886→    );\n   887→\n   888→    // Ensure item doesn't exceed totalDuration\n   889→    const maxAllowedDuration = totalDuration - startTime;\n   890→    const finalDuration = Math.min(media.duration, maxAllowedDuration);\n   891→\n   892→    // Verify that the new item doesn't overlap with any existing items\n   893→    const testItem: MediaItem = {\n   894→      id: 'temp',\n   895→      type: media.type,\n   896→      startTime,\n   897→      duration: finalDuration,\n   898→      trackId: this.mediaLibraryTargetTrackId,\n   899→      name: '',\n   900→      isPlaceholder: false\n   901→    };\n   902→\n   903→    // Validate and adjust position if needed\n   904→    const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n   905→\n   906→    // Recalculate duration limit if position was adjusted\n   907→    const adjus****************ation = totalDuration - validatedStartTime;\n   908→    const adjustedDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n   909→\n   910→    // Create the final non-overlapping item\n   911→    const newItem: MediaItem = {\n   912→      id: `item-${Date.now()}`,\n   913→      type: media.type,\n   914→      startTime: validatedStartTime,\n   915→      duration: adjustedDuration,\n   916→      trackId: this.mediaLibraryTargetTrackId,\n   917→      name: media.name,\n   918→      url: media.url, // Pass URL from media library for playback\n   919→      isPlaceholder: false\n   920→    };\n   921→\n   922→    // Set maxDuration for audio and video\n   923→    if (media.type === MediaType.VIDEO) {\n   924→      newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n   925→    } else if (media.type === MediaType.AUDIO) {\n   926→      newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n   927→    }\n   928→\n   929→    this.state.update(s => ({\n   930→      ...s,\n   931→      tracks: s.tracks.map(t =>\n   932→        t.id === this.mediaLibraryTargetTrackId\n   933→          ? { ...t, items: [...t.items, newItem] }\n   934→          : t\n   935→      )\n   936→    }));\n   937→\n   938→    // Close the media library after selection\n   939→    this.closeMediaLibrary();\n   940→  }\n   941→\n   942→  /**\n   943→   * Trim (split) the selected media item at the playhead position.\n   944→   * Creates two separate items from the original media.\n   945→   */\n   946→  trimSelectedMedia(): void {\n   947→    const currentState = this.state();\n   948→    const selectedItemId = currentState.selectedItemId;\n   949→\n   950→    if (!selectedItemId) {\n   951→      return;\n   952→    }\n   953→\n   954→    // Find the selected item and its track\n   955→    let selectedItem: MediaItem | null = null;\n   956→    let selectedTrack: Track | null = null;\n   957→\n   958→    for (const track of currentState.tracks) {\n   959→      const item = track.items.find(i => i.id === selectedItemId);\n   960→      if (item) {\n   961→        selectedItem = item;\n   962→        selectedTrack = track;\n   963→        break;\n   964→      }\n   965→    }\n   966→\n   967→    if (!selectedItem || !selectedTrack) {\n   968→      return;\n   969→    }\n   970→\n   971→    const playheadTime = currentState.playheadPosition;\n   972→    const itemStart = selectedItem.startTime;\n   973→    const itemEnd = itemStart + selectedItem.duration;\n   974→\n   975→    // Check if playhead is within the selected media item\n   976→    if (playheadTime <= itemStart || playheadTime >= itemEnd) {\n   977→      // Playhead is not within the selected media - show notification\n   978→      this.notificationsComponent?.showNotification(\n   979→        'Position the playhead within the selected media to trim it.',\n   980→        'warning'\n   981→      );\n   982→      return;\n   983→    }\n   984→\n   985→    // Ensure both parts will have at least MIN_ITEM_DURATION\n   986→    const firstPartDuration = playheadTime - itemStart;\n   987→    const secondPartDuration = itemEnd - playheadTime;\n   988→\n   989→    if (firstPartDuration < this.MIN_ITEM_DURATION || secondPartDuration < this.MIN_ITEM_DURATION) {\n   990→      this.notificationsComponent?.showNotification(\n   991→        'Cannot trim: resulting parts would be too short.',\n   992→        'warning'\n   993→      );\n   994→      return;\n   995→    }\n   996→\n   997→    // Calculate mediaStartTime adjustments\n   998→    const origi************tTime = selectedItem.mediaStartTime || 0;\n   999→    const secon**************tTime = origi************tTime + firstPartDuration;\n  1000→\n  1001→    // Create two new items from the original\n  1002→    const firstPart: MediaItem = {\n  1003→      ...selectedItem,\n  1004→      id: `item-${Date.now()}-1`,\n  1005→      duration: firstPartDuration\n  1006→      // mediaStartTime stays the same for first part\n  1007→    };\n  1008→\n  1009→    const secondPart: MediaItem = {\n  1010→      ...selectedItem,\n  1011→      id: `item-${Date.now()}-2`,\n  1012→      startTime: playheadTime,\n  1013→      duration: secondPartDuration,\n  1014→      mediaStartTime: secondPartMediaStartTime\n  1015→    };\n  1016→\n  1017→    // Update the state: remove original, add two new parts\n  1018→    this.state.update(s => ({\n  1019→      ...s,\n  1020→      tracks: s.tracks.map(t => {\n  1021→        if (t.id === selectedTrack!.id) {\n  1022→          return {\n  1023→            ...t,\n  1024→            items: [\n  1025→              ...t.items.filter(i => i.id !== selectedItemId),\n  1026→              firstPart,\n  1027→              secondPart\n  1028→            ]\n  1029→          };\n  1030→        }\n  1031→        return t;\n  1032→      }),\n  1033→      // Deselect after trimming\n  1034→      selectedItemId: null\n  1035→    }));\n  1036→\n  1037→    this.notificationsComponent?.showNotification(\n  1038→      'Media trimmed successfully.',\n  1039→      'success'\n  1040→    );\n  1041→  }\n  1042→\n  1043→  /**\n  1044→   * Copy the selected media item to the clipboard.\n  1045→   * Stores a copy of the item and the track it was copied from.\n  1046→   */\n  1047→  copySelectedMedia(): void {\n  1048→    const currentState = this.state();\n  1049→    const selectedItemId = currentState.selectedItemId;\n  1050→\n  1051→    if (!selectedItemId) {\n  1052→      return;\n  1053→    }\n  1054→\n  1055→    // Find the selected item and its track\n  1056→    let selectedItem: MediaItem | null = null;\n  1057→    let selectedTrackId: string | null = null;\n  1058→\n  1059→    for (const track of currentState.tracks) {\n  1060→      const item = track.items.find(i => i.id === selectedItemId);\n  1061→      if (item) {\n  1062→        selectedItem = item;\n  1063→        selectedTrackId = track.id;\n  1064→        break;\n  1065→      }\n  1066→    }\n  1067→\n  1068→    if (!selectedItem || !selectedTrackId) {\n  1069→      return;\n  1070→    }\n  1071→\n  1072→    // Store a copy of the item in clipboard\n  1073→    this.clipboardItem.set({ ...selectedItem });\n  1074→    this.clipboardSourceTrackId.set(selectedTrackId);\n  1075→\n  1076→    this.notificationsComponent?.showNotification(\n  1077→      'Media copied to clipboard.',\n  1078→      'success'\n  1079→    );\n  1080→  }\n  1081→\n  1082→  /**\n  1083→   * Paste the clipboard media item at the playhead position.\n  1084→   * Pastes on the same track where the item was copied from.\n  1085→   * If there's no space at playhead position, finds the next available slot.\n  1086→   */\n  1087→  pasteMedia(): void {\n  1088→    const copiedItem = this.clipboardItem();\n  1089→    const sourceTrackId = this.clipboardSourceTrackId();\n  1090→\n  1091→    if (!copiedItem || !sourceTrackId) {\n  1092→      return;\n  1093→    }\n  1094→\n  1095→    const currentState = this.state();\n  1096→    const playheadTime = currentState.playheadPosition;\n  1097→    const totalDuration = currentState.totalDuration;\n  1098→\n  1099→    // Find the source track\n  1100→    let targetTrack = currentState.tracks.find(t => t.id === sourceTrackId);\n  1101→\n  1102→    // If source track no longer exists, use the first track\n  1103→    if (!targetTrack) {\n  1104→      targetTrack = currentState.tracks[0];\n  1105→      if (!targetTrack) {\n  1106→        this.notificationsComponent?.showNotification(\n  1107→          'No tracks available to paste media.',\n  1108→          'error'\n  1109→        );\n  1110→        return;\n  1111→      }\n  1112→    }\n  1113→\n  1114→    const itemDuration = copiedItem.duration;\n  1115→\n  1116→    // Try to find a valid position starting from playhead\n  1117→    const pastePosition = this.findPastePosition(\n  1118→      playheadTime,\n  1119→      itemDuration,\n  1120→      targetTrack.items,\n  1121→      totalDuration\n  1122→    );\n  1123→\n  1124→    if (pastePosition === null) {\n  1125→      this.notificationsComponent?.showNotification(\n  1126→        'No space available to paste media on this track.',\n  1127→        'warning'\n  1128→      );\n  1129→      return;\n  1130→    }\n  1131→\n  1132→    // Create a new item with a new ID\n  1133→    const newItem: MediaItem = {\n  1134→      ...copiedItem,\n  1135→      id: `item-${Date.now()}`,\n  1136→      startTime: pastePosition,\n  1137→      trackId: targetTrack.id\n  1138→    };\n  1139→\n  1140→    // Add the new item to the track\n  1141→    this.state.update(s => ({\n  1142→      ...s,\n  1143→      tracks: s.tracks.map(t =>\n  1144→        t.id === targetTrack!.id\n  1145→          ? { ...t, items: [...t.items, newItem] }\n  1146→          : t\n  1147→      )\n  1148→    }));\n  1149→\n  1150→    this.notificationsComponent?.showNotification(\n  1151→      'Media pasted successfully.',\n  1152→      'success'\n  1153→    );\n  1154→  }\n  1155→\n  1156→  /**\n  1157→   * Find a valid position to paste media item.\n  1158→   * First tries at the playhead position, then finds the next available gap.\n  1159→   */\n  1160→  private findPastePosition(\n  1161→    preferredPosition: number,\n  1162→    duration: number,\n  1163→    existingItems: MediaItem[],\n  1164→    totalDuration: number\n  1165→  ): number | null {\n  1166→    // Check if we can fit at the preferred position (playhead)\n  1167→    if (this.canFitAtPosition(preferredPosition, duration, existingItems, totalDuration)) {\n  1168→      return preferredPosition;\n  1169→    }\n  1170→\n  1171→    // Sort existing items by start time\n  1172→    const sortedItems = [...existingItems].sort((a, b) => a.startTime - b.startTime);\n  1173→\n  1174→    // Find all gaps on the track and try to place the item\n  1175→    const gaps = this.dragDropService.findAllGaps(sortedItems);\n  1176→\n  1177→    // First, try to find a gap that starts at or after the playhead\n  1178→    for (const gap of gaps) {\n  1179→      // Calculate actual gap size (considering totalDuration for infinite gaps)\n  1180→      const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n  1181→      const gapSize = effectiveGapEnd - gap.gapStart;\n  1182→\n  1183→      if (gap.gapStart >= preferredPosition && gapSize >= duration) {\n  1184→        return gap.gapStart;\n  1185→      }\n  1186→    }\n  1187→\n  1188→    // If no gap after playhead, try any gap that can fit the item\n  1189→    for (const gap of gaps) {\n  1190→      // Calculate actual gap size (considering totalDuration for infinite gaps)\n  1191→      const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n  1192→      const gapSize = effectiveGapEnd - gap.gapStart;\n  1193→\n  1194→      if (gapSize >= duration) {\n  1195→        return gap.gapStart;\n  1196→      }\n  1197→    }\n  1198→\n  1199→    // No suitable position found\n  1200→    return null;\n  1201→  }\n  1202→\n  1203→  /**\n  1204→   * Check if an item can fit at a specific position without overlapping.\n  1205→   */\n  1206→  private canFitAtPosition(\n  1207→    position: number,\n  1208→    duration: number,\n  1209→    existingItems: MediaItem[],\n  1210→    totalDuration: number\n  1211→  ): boolean {\n  1212→    // Check bounds\n  1213→    if (position < 0 || position + duration > totalDuration) {\n  1214→      return false;\n  1215→    }\n  1216→\n  1217→    // Check for overlaps with existing items\n  1218→    const endPosition = position + duration;\n  1219→    for (const item of existingItems) {\n  1220→      const itemEnd = item.startTime + item.duration;\n  1221→      // Check if there's an overlap\n  1222→      if (position < itemEnd && endPosition > item.startTime) {\n  1223→        return false;\n  1224→      }\n  1225→    }\n  1226→\n  1227→    return true;\n  1228→  }\n  1229→}\n  1230→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"}]},"parent_tool_use_id":null,"session_id":"084914e4-263f-4bd0-8b1a-fcc69335a956","uuid":"9f014e5e-0ca8-487d-98c6-90c129afa8f3","tool_use_result":{"type":"text","file":{"filePath":"/tmp/gh-issue-solver-1764934996954/video-timeline/src/app/components/timeline/timeline.component.ts","content":"import { Component, signal, computed, ViewChild, ElementRef, AfterViewInit, OnDestroy, effect } from '@angular/core';\nimport { CommonModule } from '@angular/common';\nimport { MediaType, MediaItem, Track, TimelineState } from '../../models/timeline.models';\nimport { MediaLibraryComponent, MediaLibraryItem } from '../media-library/media-library.component';\nimport { Media***********onent } from '../media-toolbar/media-toolbar.component';\nimport { Notif************onent } from '../notifications/notifications.component';\nimport { Timel*************rvice } from '../../services/timeline-drag-drop.service';\nimport { PlaybackService } from '../../services/playback.service';\n\n@Component({\n  selector: 'app-timeline',\n  standalone: true,\n  imports: [CommonModule, MediaLibraryComponent, MediaToolbarComponent, NotificationsComponent],\n  templateUrl: './timeline.component.html',\n  styleUrl: './timeline.component.css'\n})\nexport class TimelineComponent implements AfterViewInit, OnDestroy {\n  // Zoom levels: pixels per second\n  private readonly MIN_ZOOM = 10;\n  private readonly MAX_ZOOM = 200;\n  private readonly ZOOM_STEP = 20;\n  readonly TRACK_HEADER_WIDTH = 150; // Width of track header in pixels\n  private readonly SNAP_PROXIMITY_MS = 500; // Snap to item if playhead is within 500ms\n  private readonly MIN_ITEM_DURATION = 100; // Minimum item duration in milliseconds\n\n  // Canvas dimensions for preview\n  readonly PREVIEW_WIDTH = 640;\n  readonly PREVIEW_HEIGHT = 360;\n\n  // View references\n  @ViewChild('timelineRuler') timelineRuler?: ElementRef<HTMLElement>;\n  @ViewChild('notifications') notificationsComponent?: NotificationsComponent;\n  @ViewChild('previewCanvas') previewCanvas?: ElementRef<HTMLCanvasElement>;\n\n  // Timeline state\n  readonly state = signal<TimelineState>({\n    tracks: [\n      { id: '1', name: 'Track 1', order: 0, items: [] },\n      { id: '2', name: 'Track 2', order: 1, items: [] }\n    ],\n    playheadPosition: 0,\n    zoomLevel: 50, // pixels per second\n    totalDuration: 120000, // 120 seconds in milliseconds\n    selectedItemId: null\n  });\n\n  // Computed values\n  readonly pixel**********econd = computed(() => {\n    return this.state().zoomLevel / 1000;\n  });\n\n  readonly timelineWidth = computed(() => {\n    const state = this.state();\n    // Calculate the maximum end time across all tracks\n    let maxEndTime = state.totalDuration;\n\n    for (const track of state.tracks) {\n      for (const item of track.items) {\n        const itemEndTime = item.startTime + item.duration;\n        if (itemEndTime > maxEndTime) {\n          maxEndTime = itemEndTime;\n        }\n      }\n    }\n\n    return maxEndTime * this.pixelsPerMillisecond();\n  });\n\n  readonly timelineLineHeight = computed(() => {\n    const state = this.state();\n    return state.tracks.length * 60 + 32;\n  });\n\n  readonly playheadPosition = computed(() => {\n    return this.state().playheadPosition * this.pixelsPerMillisecond();\n  });\n\n  readonly playh************ition = computed(() => {\n    return this.playheadPosition() + this.TRACK_HEADER_WIDTH;\n  });\n\n  // Computed: whether a media item is currently selected\n  readonly hasSelectedItem = computed(() => {\n    return this.state().selectedItemId !== null;\n  });\n\n  // Dragging state\n  private draggedItem: MediaItem | null = null;\n  private draggedItemOriginalTrackId: string | null = null;\n  private dragOffsetTime: number = 0; // Offset in milliseconds from item start to cursor position\n  private isDraggingPlayhead = false;\n  private isDraggingFromRuler = false;\n  private resizingItem: { item: MediaItem; edge: 'left' | 'right' } | null = null;\n  private mouseDownPosition: { x: number; y: number } | null = null; // Track mouse down position for click detection\n\n  // Video preview state\n  readonly isPlaying = signal<boolean>(false);\n\n  // Duration editor state\n  readonly showDurationEditor = signal<boolean>(false);\n  private editedDuration: number = 120; // Duration in seconds\n\n  // Media library state\n  readonly showMediaLibrary = signal<boolean>(false);\n  private mediaLibraryTargetTrackId: string | null = null;\n\n  // Clipboard state for copy/paste functionality\n  private readonly clipboardItem = signal<MediaItem | null>(null);\n  private readonly clipb************ackId = signal<string | null>(null);\n\n  // Computed: whether a media item is in clipboard\n  readonly hasClipboardItem = computed(() => {\n    return this.clipboardItem() !== null;\n  });\n\n  // Render loop ID for cleanup\n  private renderLoopId: number | null = null;\n\n  constructor(\n    private dragDropService: TimelineDragDropService,\n    public playbackService: PlaybackService\n  ) {\n    // Effect to sync playhead position from PlaybackService during playback\n    effect(() => {\n      if (this.playbackService.isPlaying()) {\n        const position = this.playbackService.playheadPosition();\n        this.state.update(s => ({\n          ...s,\n          playheadPosition: position\n        }));\n      }\n    });\n  }\n\n  ngAfterViewInit(): void {\n    // Initialize canvas for preview rendering\n    if (this.previewCanvas) {\n      this.playbackService.setCanvas(this.previewCanvas.nativeElement);\n    }\n\n    // Start continuous render loop for preview (renders current frame even when paused)\n    this.startRenderLoop();\n  }\n\n  ngOnDestroy(): void {\n    // Clean up render loop\n    if (this.renderLoopId !== null) {\n      cancelAnimationFrame(this.renderLoopId);\n      this.renderLoopId = null;\n    }\n\n    // Stop playback\n    this.playbackService.stop();\n  }\n\n  /**\n   * Continuous render loop for preview canvas.\n   * Keeps rendering even when paused so seeking updates the preview.\n   */\n  private startRenderLoop(): void {\n    const render = () => {\n      // Only render if we have active media and are not playing\n      // (PlaybackService handles rendering during playback)\n      if (!this.playbackService.isPlaying()) {\n        this.playbackService.renderCurrentFrame();\n      }\n      this.renderLoopId = requestAnimationFrame(render);\n    };\n    this.renderLoopId = requestAnimationFrame(render);\n  }\n\n  // Track management\n  addTrack(): void {\n    const currentState = this.state();\n    const newTrack: Track = {\n      id: `track-${Date.now()}`,\n      name: `Track ${currentState.tracks.length + 1}`,\n      order: currentState.tracks.length,\n      items: []\n    };\n\n    this.state.update(s => ({\n      ...s,\n      tracks: [...s.tracks, newTrack]\n    }));\n  }\n\n  removeTrack(trackId: string): void {\n    const currentState = this.state();\n    if (currentState.tracks.length <= 1) {\n      return; // Keep at least one track\n    }\n\n    this.state.update(s => ({\n      ...s,\n      tracks: s.tracks.filter(t => t.id !== trackId)\n    }));\n  }\n\n  // Zoom controls\n  zoomIn(): void {\n    this.state.update(s => ({\n      ...s,\n      zoomLevel: Math.min(s.zoomLevel + this.ZOOM_STEP, this.MAX_ZOOM)\n    }));\n  }\n\n  zoomOut(): void {\n    this.state.update(s => ({\n      ...s,\n      zoomLevel: Math.max(s.zoomLevel - this.ZOOM_STEP, this.MIN_ZOOM)\n    }));\n  }\n\n  // Utility method to extract coordinates from mouse or touch events\n  private getEventCoordinates(event: MouseEvent | TouchEvent): { clientX: number; clientY: number } {\n    if (event instanceof MouseEvent) {\n      return { clientX: event.clientX, clientY: event.clientY };\n    } else {\n      const touch = event.touches[0] || event.changedTouches[0];\n      return { clientX: touch.clientX, clientY: touch.clientY };\n    }\n  }\n\n  // Playhead controls\n  onRulerPointerDown(event: MouseEvent | TouchEvent): void {\n    event.preventDefault();\n    this.isDraggingFromRuler = true;\n\n    // Immediately update position on pointer down\n    const target = event.currentTarget as HTMLElement;\n    const rect = target.getBoundingClientRect();\n    const coords = this.getEventCoordinates(event);\n    // Calculate position within the ruler element\n    // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n    const x = coords.clientX - rect.left;\n    const newPosition = x / this.pixelsPerMillisecond();\n    const currentState = this.state();\n    const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n    this.state.update(s => ({\n      ...s,\n      playheadPosition: clampedPosition\n    }));\n\n    // Sync position to playback service for seeking\n    this.playbackService.seek(currentState.tracks, clampedPosition);\n  }\n\n  onPlayheadPointerDown(event: MouseEvent | TouchEvent): void {\n    event.preventDefault();\n    event.stopPropagation();\n    this.isDraggingPlayhead = true;\n  }\n\n\n  // Media item drag and drop\n  onMediaItemPointerDown(event: MouseEvent | TouchEvent, item: MediaItem, track: Track): void {\n    const target = event.target as HTMLElement;\n\n    // Check if clicking/touching on resize handle\n    if (target.classList.contains('resize-handle')) {\n      this.resizingItem = {\n        item,\n        edge: target.classList.contains('resize-handle-left') ? 'left' : 'right'\n      };\n      event.preventDefault();\n      return;\n    }\n\n    const coords = this.getEventCoordinates(event);\n    this.mouseDownPosition = { x: coords.clientX, y: coords.clientY };\n\n    const mediaItemElement = event.currentTarget as HTMLElement;\n    const rect = mediaItemElement.getBoundingClientRect();\n    const clickX = coords.clientX - rect.left;\n\n    // Convert pixel offset to time offset\n    this.dragOffsetTime = clickX / this.pixelsPerMillisecond();\n\n    this.draggedItem = item;\n    this.draggedItemOriginalTrackId = track.id;\n    event.preventDefault();\n  }\n\n  onTrackPointerDown(event: MouseEvent | TouchEvent): void {\n    // Deselect when clicking/touching track background (not on media item)\n    const target = event.target as HTMLElement;\n    if (target.classList.contains('track')) {\n      this.deselectMediaItem();\n    }\n  }\n\n  onTrackPointerMove(event: MouseEvent | TouchEvent, track: Track): void {\n    if (this.resizingItem) {\n      this.handleResize(event, track);\n      return;\n    }\n    event.preventDefault();\n    event.stopPropagation();\n\n    if (!this.draggedItem) return;\n\n    const coords = this.getEventCoordinates(event);\n    const target = event.currentTarget as HTMLElement;\n    const rect = target.getBoundingClientRect();\n    const x = coords.clientX - rect.left;\n    const requestedStartTime = Math.max(0, x / this.pixelsPerMillisecond() - this.dragOffsetTime);\n\n    this.state.update(s => {\n      const updatedTracks = s.tracks.map(t => {\n        if (t.id === track.id) {\n          // Get all items except the dragged one for collision detection\n          const otherItems = t.items.filter(i => i.id !== this.draggedItem!.id);\n\n          // Fix for issue #81: Find snap targets (playhead and items on all tracks)\n          const snapTargets = this.dragDropService.findSnapTargets(\n            this.draggedItem!.id,\n            s.tracks,\n            s.playheadPosition\n          );\n\n          // Calculate valid position and duration considering collisions, gap fitting, and snapping\n          const validPosition = this.dragDropService.getValidDragPosition(\n            this.draggedItem!,\n            requestedStartTime,\n            otherItems,\n            s.totalDuration,\n            snapTargets\n          );\n\n          // Check if item already exists in this track\n          const itemExists = t.items.some(i => i.id === this.draggedItem!.id);\n\n          if (itemExists) {\n            // Update position and duration in current track\n            return {\n              ...t,\n              items: t.items.map(i =>\n                i.id === this.draggedItem!.id\n               
[2025-12-05T11:45:45.257Z] [INFO]    ? {\n                      ...i,\n                      startTime: validPosition.startTime,\n                      duration: validPosition.duration,\n                      trackId: track.id\n                    }\n                  : i\n              )\n            };\n          } else {\n            // Add to new track with adjusted position and duration\n            return {\n              ...t,\n              items: [\n                ...otherItems,\n                {\n                  ...this.draggedItem!,\n                  startTime: validPosition.startTime,\n                  duration: validPosition.duration,\n                  trackId: track.id\n                }\n              ]\n            };\n          }\n        } else if (t.id === this.draggedItemOriginalTrackId && t.id !== track.id) {\n          // Remove from original track only if moving to different track\n          return {\n            ...t,\n            items: t.items.filter(i => i.id !== this.draggedItem!.id)\n          };\n        }\n        return t;\n      });\n\n      // Update the original track ID to current track for smooth dragging within same track\n      this.draggedItemOriginalTrackId = track.id;\n\n      return { ...s, tracks: updatedTracks };\n    });\n  }\n\n  private handleResize(event: MouseEvent | TouchEvent, track: Track): void {\n    if (!this.resizingItem) return;\n\n    const coords = this.getEventCoordinates(event);\n    const target = event.currentTarget as HTMLElement;\n    const rect = target.getBoundingClientRect();\n    // Fix for issue #83: getBoundingClientRect() returns viewport-relative coordinates,\n    // and coords.clientX is also viewport-relative, so we don't need to add scrollLeft\n    const x = coords.clientX - rect.left;\n    const timeAtCursor = x / this.pixelsPerMillisecond();\n\n    this.state.update(s => {\n      // Fix for issue #87: Find snap targets for resize operations\n      const snapTargets = this.dragDropService.findSnapTargets(\n        this.resizingItem!.item.id,\n        s.tracks,\n        s.playheadPosition\n      );\n\n      const updatedTracks = s.tracks.map(t => {\n        if (t.id === track.id) {\n          // Get resize bounds considering adjacent items\n          const bounds = this.dragDropService.getResizeBounds(\n            this.resizingItem!.item,\n            t.items,\n            this.resizingItem!.edge,\n            s.totalDuration\n          );\n\n          return {\n            ...t,\n            items: t.items.map(i => {\n              if (i.id === this.resizingItem!.item.id) {\n                if (this.resizingItem!.edge === 'left') {\n                  // Fix for issue #89: Handle mediaStartTime when resizing from left\n                  // Apply snapping to left edge (start time)\n                  let newStartTime = Math.max(\n                    bounds.minTime,\n                    Math.min(timeAtCursor, bounds.maxTime)\n                  );\n\n                  // Apply snapping if within snap distance\n                  let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n                  for (const target of snapTargets) {\n                    const distance = Math.abs(newStartTime - target);\n                    if (distance < minDistance) {\n                      minDistance = distance;\n                      // Only snap if within bounds\n                      if (target >= bounds.minTime && target <= bounds.maxTime) {\n                        newStartTime = target;\n                      }\n                    }\n                  }\n\n                  // Calculate how much the timeline position is changing\n                  const deltaTime = newStartTime - i.startTime;\n                  const newDuration = i.duration - deltaTime;\n\n                  // Update media start time (trimming from source media)\n                  const curre***********tTime = i.mediaStartTime || 0;\n                  const newMediaStartTime = curre***********tTime + deltaTime;\n\n                  // Check if we're trying to extend beyond the start of source media\n                  if (newMediaStartTime < 0) {\n                    // Can only extend left by curre***********tTime amount\n                    const maxExtension = currentMediaStartTime;\n                    const finalStartTime = i.startTime - maxExtension;\n                    const finalDuration = i.duration + maxExtension;\n\n                    // Ensure we don't exceed maxDuration\n                    if (i.maxDuration && finalDuration > i.maxDuration) {\n                      return {\n                        ...i,\n                        startTime: finalStartTime + (finalDuration - i.maxDuration),\n                        duration: i.maxDuration,\n                        mediaStartTime: 0\n                      };\n                    }\n\n                    return {\n                      ...i,\n                      startTime: finalStartTime,\n                      duration: finalDuration,\n                      mediaStartTime: 0\n                    };\n                  }\n\n                  // Ensure media end doesn't exceed maxDuration\n                  if (i.maxDuration && newMediaStartTime + newDuration > i.maxDuration) {\n                    const maxAllowedDuration = i.maxDuration - newMediaStartTime;\n                    return {\n                      ...i,\n                      startTime: i.startTime + (i.duration - maxAllowedDuration),\n                      duration: maxAllowedDuration,\n                      mediaStartTime: newMediaStartTime\n                    };\n                  }\n\n                  return {\n                    ...i,\n                    startTime: newStartTime,\n                    duration: newDuration,\n                    mediaStartTime: newMediaStartTime\n                  };\n                } else {\n                  // Fix for issue #87: Apply snapping to right edge (end time)\n                  let newEndTime = Math.max(\n                    bounds.minTime,\n                    Math.min(timeAtCursor, bounds.maxTime)\n                  );\n\n                  // Apply snapping if within snap distance\n                  let minDistance = this.dragDropService.SNAP_DISTANCE_MS;\n                  for (const target of snapTargets) {\n                    const distance = Math.abs(newEndTime - target);\n                    if (distance < minDistance) {\n                      minDistance = distance;\n                      // Only snap if within bounds\n                      if (target >= bounds.minTime && target <= bounds.maxTime) {\n                        newEndTime = target;\n                      }\n                    }\n                  }\n\n                  const newDuration = newEndTime - i.startTime;\n\n                  // Limit duration by maxDuration if specified\n                  const limitedDuration = i.maxDuration\n                    ? Math.min(newDuration, i.maxDuration)\n                    : newDuration;\n\n                  return { ...i, duration: limitedDuration };\n                }\n              }\n              return i;\n            })\n          };\n        }\n        return t;\n      });\n\n      return { ...s, tracks: updatedTracks };\n    });\n  }\n\n  onPointerUp(event: MouseEvent | TouchEvent): void {\n    // Detect if this was a click/tap (not a drag) on a media item\n    if (this.draggedItem && this.mouseDownPosition) {\n      const coords = this.getEventCoordinates(event);\n      const dx = coords.clientX - this.mouseDownPosition.x;\n      const dy = coords.clientY - this.mouseDownPosition.y;\n      const distance = Math.sqrt(dx * dx + dy * dy);\n\n      // If pointer moved less than 5 pixels, consider it a click/tap\n      if (distance < 5) {\n        this.selectMediaItem(this.draggedItem.id);\n      }\n    }\n\n    this.draggedItem = null;\n    this.draggedItemOriginalTrackId = null;\n    this.dragOffsetTime = 0;\n    this.isDraggingPlayhead = false;\n    this.isDraggingFromRuler = false;\n    this.resizingItem = null;\n    this.mouseDownPosition = null;\n  }\n\n  onDocumentPointerMove(event: MouseEvent | TouchEvent): void {\n    if (this.isDraggingPlayhead || this.isDraggingFromRuler) {\n      // Fix for issue #50: Use ViewChild reference to ensure we use the exact same element as onRulerPointerDown\n      if (!this.timelineRuler) {\n        return;\n      }\n\n      const coords = this.getEventCoordinates(event);\n      const rulerElement = this.timelineRuler.nativeElement;\n      // Use the same calculation as onRulerPointerDown\n      // getBoundingClientRect() already accounts for scroll, so we don't add scrollLeft\n      const rect = rulerElement.getBoundingClientRect();\n      const x = coords.clientX - rect.left;\n      const newPosition = x / this.pixelsPerMillisecond();\n      const currentState = this.state();\n      const clampedPosition = Math.max(0, Math.min(newPosition, currentState.totalDuration));\n\n      this.state.update(s => ({\n        ...s,\n        playheadPosition: clampedPosition\n      }));\n\n      // Sync position to playback service for seeking (but don't call too frequently during drag)\n      this.playbackService.seek(currentState.tracks, clampedPosition);\n    }\n\n    // Fix for issue #96: Handle media item dragging and resizing at document level for touch events\n    // This allows dragging between tracks on mobile devices\n    if (event instanceof TouchEvent) {\n      if (this.draggedItem) {\n        // Find which track the touch is currently over\n        const targetTrack = this.findTrackAtCoordinates(this.getEventCoordinates(event));\n        if (targetTrack) {\n          // Reuse existing drag logic\n          this.onTrackPointerMove(event, targetTrack);\n        }\n      } else if (this.resizingItem) {\n        // Find the track that contains the resizing item\n        const targetTrack = this.findTrackContainingItem(this.resizingItem.item.id);\n        if (targetTrack) {\n          // Reuse existing resize logic\n          this.handleResize(event, targetTrack);\n        }\n      }\n    }\n  }\n\n  // Helper method to find which track is at the given Y coordinate\n  private findTrackAtCoordinates(coords: { clientX: number; clientY: number }): Track | null {\n    const trackElements = document.querySelectorAll('.track');\n    for (const trackElement of Array.from(trackElements)) {\n      const rect = trackElement.getBoundingClientRect();\n      if (coords.clientY >= rect.top && coords.clientY <= rect.bottom) {\n        const trackIndex = Array.from(trackElements).indexOf(trackElement);\n        const tracks = this.state().tracks;\n        if (trackIndex >= 0 && trackIndex < tracks.length) {\n          return tracks[trackIndex];\n        }\n      }\n    }\n    return null;\n  }\n\n  // Helper method to find the track containing a specific item\n  private findTrackContainingItem(itemId: string): Track | null {\n    const currentState = this.state();\n    for (const track of currentState.tracks) {\n      if (track.items.some(item => item.id === itemId)) {\n        return track;\n      }\n    }\n    return null;\n  }\n\n  // Helper methods\n  getItemStyle(item: MediaItem) {\n    return {\n      left: `${item.startTime * this.pixelsPerMillisecond()}px`,\n      width: `${item.duration * this.pixelsPerMillisecond()}px`\n    };\n  }\n\n  getMediaTypeClass(type: MediaType): string {\n    return `media-${type}`;\n  }\n\n  formatTime(milliseconds: number): string {\n    const seconds = Math.floor(milliseconds / 1000);\n    const minutes = Math.floor(seconds / 60);\n    const remainingSeconds = seconds % 60;\n    const cs = Math.floor((milliseconds % 1000) / 10);\n    return `${minutes}:${remainingSeconds.toString().padStart(2, '0')}.${cs.toString().padStart(2, '0')}`;\n  }\n\n  /**\n   * Calculate appropriate time interval for markers based on zoom level\n   * to prevent marker labels from overlapping\n   */\n  private getMarkerInterval(): number {\n    // Minimum spacing between markers in pixels to prevent overlap\n    // Enough space for \"0:00.000\" text (about 50-60px)\n    const MIN_M***********NG_PX = 60;\n\n    // Calculate how much time represents MIN_M***********NG_PX at current zoom\n    const pixelsPerMs = this.pixelsPerMillisecond();\n    const minTimeSpacing = MIN_M***********NG_PX / pixelsPerMs;\n\n    // Define possible intervals (in ms): 100ms, 250ms, 500ms, 1s, 2s, 5s, 10s, 30s, 60s\n    const intervals = [100, 250, 500, 1000, 2000, 5000, 10000, 30000, 60000];\n\n    // Find the smallest interval that's larger than or equal to minTimeSpacing\n    for (const interval of intervals) {\n      if (interval >= minTimeSpacing) {\n        return interval;\n      }\n    }\n\n    // If even 60s is too small, use larger intervals\n    return Math.ceil(minTimeSpacing / 60000) * 60000;\n  }\n\n  getTimeMarkers(): { position: number; label: string }[] {\n    const markers: { position: number; label: string }[] = [];\n    const stepMs = this.getMarkerInterval(); // Dynamic interval based on zoom level\n\n    // Fix for issue #85: Do not show the last time mark at totalDuration\n    // to prevent container expansion from the text label\n    for (let time = 0; time < this.state().totalDuration; time += stepMs) {\n      markers.push({\n        position: time * this.pixelsPerMillisecond(),\n        label: this.formatTime(time)\n      });\n    }\n\n    return markers;\n  }\n\n  // Add placeholder media item\n  addMediaItem(type: MediaType, trackId: string): void {\n    const currentState = this.state();\n    const track = currentState.tracks.find(t => t.id === trackId);\n\n    if (!track) return;\n\n    const playheadTime = currentState.playheadPosition;\n    const totalDuration = currentState.totalDuration;\n    const newItemDuration = type === MediaType.IMAGE ? 5000 : 3000;\n\n    // Determine the start time for the new item using the service\n    const startTime = this.dragDropService.calculateNewItemStartTime(\n      playheadTime,\n      track.items,\n      this.SNAP_PROXIMITY_MS\n    );\n\n    // Fix for issue #48: Ensure new item doesn't exceed totalDuration\n    const maxAllowedDuration = totalDuration - startTime;\n    const finalDuration = Math.min(newItemDuration, maxAllowedDuration);\n\n    // Fix for issue #64: Verify that the new item doesn't overlap with any existing items\n    const testItem: MediaItem = {\n      id: 'temp',\n      type,\n      startTime,\n      duration: finalDuration,\n      trackId,\n      name: '',\n      isPlaceholder: true\n    };\n\n    // Validate and adjust position if needed\n    const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n    // Recalculate duration limit if position was adjusted\n    const adjus****************ation = totalDuration - validatedStartTime;\n    const adjustedDuration = Math.min(newItemDuration, adjustedMaxAllowedDuration);\n\n    // Create the final non-overlapping item\n    const newItem: MediaItem = {\n      id: `item-${Date.now()}`,\n      type,\n      startTime: validatedStartTime,\n      duration: adjustedDuration,\n      trackId,\n      name: `${type} placeholder`,\n      isPlaceholder: true\n    };\n\n    // Set maxDuration for audio and video placeholders\n    if (type === MediaType.VIDEO) {\n      newItem.maxDuration = Math.min(10000, adjustedMaxAllowedDuration); // 10 seconds default for video\n    } else if (type === MediaType.AUDIO) {\n      newItem.maxDuration = Math.min(15000, adjustedMaxAllowedDuration); // 15 seconds default for audio\n    }\n\n    this.state.update(s => ({\n      ...s,\n      tracks: s.tracks.map(t =>\n        t.id === trackId\n          ? { ...t, items: [...t.items, newItem] }\n          : t\n      )\n    }));\n  }\n\n  removeMediaItem(itemId: string, trackId: string): void {\n    this.state.update(s => ({\n      ...s,\n      tracks: s.tracks.map(t =>\n        t.id === trackId\n          ? { ...t, items: t.items.filter(i => i.id !== itemId) }\n          : t\n      ),\n      // Deselect if removing selected item\n      selectedItemId: s.selectedItemId === itemId ? null : s.selectedItemId\n    }));\n  }\n\n  // Media selection\n  selectMediaItem(itemId: string): void {\n    this.state.update(s => ({\n      ...s,\n      selectedItemId: itemId\n    }));\n  }\n\n  deselectMediaItem(): void {\n    this.state.update(s => ({\n      ...s,\n      selectedItemId: null\n    }));\n  }\n\n  isItemSelected(itemId: string): boolean {\n    return this.state().selectedItemId === itemId;\n  }\n\n  readonly MediaType = MediaType;\n\n  // Video preview controls\n  togglePlayback(): void {\n    const currentState = this.state();\n\n    if (this.playbackService.isPlaying()) {\n      this.playbackService.pause();\n      this.isPlaying.set(false);\n    } else {\n      // Sync playhead position to PlaybackService before starting\n      this.playbackService.setPlayheadPosition(currentState.playheadPosition);\n      this.playbackService.play(currentState.tracks, currentState.totalDuration);\n      this.isPlaying.set(true);\n    }\n  }\n\n  skipBackward(): void {\n    const currentState = this.state();\n    const newPosition = Math.max(0, currentState.playheadPosition - 5000);\n\n    this.state.update(s => ({\n      ...s,\n      playheadPosition: newPosition\n    }));\n\n    // Sync position and update media\n    this.playbackService.seek(currentState.tracks, newPosition);\n  }\n\n  skipForward(): void {\n    const currentState = this.state();\n    const newPosition = Math.min(currentState.totalDuration, currentState.playheadPosition + 5000);\n\n    this.state.update(s => ({\n      ...s,\n      playheadPosition: newPosition\n    }));\n\n    // Sync position and update media\n    this.playbackService.seek(currentState.tracks, newPosition);\n  }\n\n  // Duration editor methods\n  openDurationEditor(): void {\n    this.editedDuration = this.state().totalDuration / 1000;\n    this.showDurationEditor.set(true);\n  }\n\n  closeDurationEditor(): void {\n    this.showDurationEditor.set(false);\n  }\n\n  onDurationInputChange(event: Event): void {\n    const input = event.target as HTMLInputElement;\n    const value = parseFloat(input.value);\n    if (!isNaN(value) && value > 0) {\n      this.editedDuration = value;\n    }\n  }\n\n  saveDuration(): void {\n    const newDurationMs = Math.max(1000, this.editedDuration * 1000); // At least 1 second\n    this.state.update(s => ({\n      ...s,\n      totalDuration: newDurationMs,\n      // Ensure playhead doesn't exceed new duration\n      playheadPosition: Math.min(s.playheadPosition, newDurationMs)\n    }));\n    this.closeDurationEditor();\n  }\n\n  // Media library methods\n  openMediaLibrary(trackId: string): void {\n    this.mediaLibraryTargetTrackId = trackId;\n    this.showMediaLibrary.set(true);\n  }\n\n  closeMediaLibrary(): void {\n    this.showMediaLibrary.set(false);\n    this.mediaLibraryTargetTrackId = null;\n  }\n\n  onMediaSelected(media: MediaLibraryItem): void {\n    if (!this.mediaLibraryTargetTrackId) return;\n\n    const currentState = this.state();\n    const track = currentState.tracks.find(t => t.id === this.mediaLibraryTargetTrackId);\n\n    if (!track) return;\n\n    const playheadTime = currentState.playheadPosition;\n    const totalDuration = currentState.totalDuration;\n\n    // Determine the start time for the new item using the service\n    const startTime = this.dragDropService.calculateNewItemStartTime(\n      playheadTime,\n      track.items,\n      this.SNAP_PROXIMITY_MS\n    );\n\n    // Ensure item doesn't exceed totalDuration\n    const maxAllowedDuration = totalDuration - startTime;\n    const finalDuration = Math.min(media.duration, maxAllowedDuration);\n\n    // Verify that the new item doesn't overlap with any existing items\n    const testItem: MediaItem = {\n      id: 'temp',\n      type: media.type,\n      startTime,\n      duration: finalDuration,\n      trackId: this.mediaLibraryTargetTrackId,\n      name: '',\n      isPlaceholder: false\n    };\n\n    // Validate and adjust position if needed\n    const validatedStartTime = this.dragDropService.validateItemPosition(testItem, track.items);\n\n    // Recalculate duration limit if position was adjusted\n    const adjus****************ation = totalDuration - validatedStartTime;\n    const adjustedDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n\n    // Create the final non-overlapping item\n    const newItem: MediaItem = {\n      id: `item-${Date.now()}`,\n      type: media.type,\n      startTime: validatedStartTime,\n      duration: adjustedDuration,\n      trackId: this.mediaLibraryTargetTrackId,\n      name: media.name,\n      url: media.url, // Pass URL from media library for playback\n      isPlaceholder: false\n    };\n\n    // Set maxDuration for audio and video\n    if (media.type === MediaType.VIDEO) {\n      newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n    } else if (media.type === MediaType.AUDIO) {\n      newItem.maxDuration = Math.min(media.duration, adjustedMaxAllowedDuration);\n    }\n\n    this.state.update(s => ({\n      ...s,\n      tracks: s.tracks.map(t =>\n        t.id === this.mediaLibraryTargetTrackId\n          ? { ...t, items: [...t.items, newItem] }\n          : t\n      )\n    }));\n\n    // Close the media library after selection\n    this.closeMediaLibrary();\n  }\n\n  /**\n   * Trim (split) the selected media item at the playhead position.\n   * Creates two separate items from the original media.\n   */\n  trimSelectedMedia(): void {\n    const currentState = this.state();\n    const selectedItemId = currentState.selectedItemId;\n\n    if (!selectedItemId) {\n      return;\n    }\n\n    // Find the selected item and its track\n    let selectedItem: MediaItem | null = null;\n    let selectedTrack: Track | null = null;\n\n    for (const track of currentState.tracks) {\n      const item = track.items.find(i => i.id === selectedItemId);\n      if (item) {\n        selectedItem = item;\n        selectedTrack = track;\n        break;\n      }\n    }\n\n    if (!selectedItem || !selectedTrack) {\n      return;\n    }\n\n    const playheadTime = currentState.playheadPosition;\n    const itemStart = selectedItem.startTime;\n    const itemEnd = itemStart + selectedItem.duration;\n\n    // Check if playhead is within the selected media item\n    if (playheadTime <= itemStart || playheadTime >= itemEnd) {\n      // Playhead is not within the selected media - show notification\n      this.notificationsComponent?.showNotification(\n        'Position the playhead within the selected media to trim it.',\n        'warning'\n      );\n      return;\n    }\n\n    // Ensure both parts will have at least MIN_ITEM_DURATION\n    const firstPartDuration = playheadTime - itemStart;\n    const secondPartDuration = itemEnd - playheadTime;\n\n    if (firstPartDuration < this.MIN_ITEM_DURATION || secondPartDuration < this.MIN_ITEM_DURATION) {\n      this.notificationsComponent?.showNotification(\n        'Cannot trim: resulting parts would be too short.',\n        'warning'\n      );\n      return;\n    }\n\n    // Calculate mediaStartTime adjustments\n    const origi************tTime = selectedItem.mediaStartTime || 0;\n    const secon**************tTime = origi************tTime + firstPartDuration;\n\n    // Create two new items from the original\n    const firstPart: MediaItem = {\n      ...selectedItem,\n      id: `item-${Date.now()}-1`,\n      duration: firstPartDuration\n      // mediaStartTime stays the same for first part\n    };\n\n    const secondPart: MediaItem = {\n      ...selectedItem,\n      id: `item-${Date.now()}-2`,\n      startTime: playheadTime,\n      duration: secondPartDuration,\n      mediaStartTime: secondPartMediaStartTime\n    };\n\n    // Update the state: remove original, add two new parts\n    this.state.update(s => ({\n      ...s,\n      tracks: s.tracks.map(t => {\n        if (t.id === selectedTrack!.id) {\n          return {\n            ...t,\n            items: [\n              ...t.items.filter(i => i.id !== selectedItemId),\n              firstPart,\n              secondPart\n            ]\n          };\n        }\n        return t;\n      }),\n      // Deselect after trimming\n      selectedItemId: null\n    }));\n\n    this.notificationsComponent?.showNotification(\n      'Media trimmed successfully.',\n      'success'\n    );\n  }\n\n  /**\n   * Copy the selected media item to the clipboard.\n   * Stores a copy of the item and the track it was copied from.\n   */\n  copySelectedMedia(): void {\n    const currentState = this.state();\n    const selectedItemId = currentState.selectedItemId;\n\n    if (!selectedItemId) {\n      return;\n    }\n\n    // Find the selected item and its track\n    let selectedItem: MediaItem | null = null;\n    let selectedTrackId: string | null = null;\n\n    for (const track of currentState.tracks) {\n      const item = track.items.find(i => i.id === selectedItemId);\n      if (item) {\n        selectedItem = item;\n        selectedTrackId = track.id;\n        break;\n      }\n    }\n\n    if (!selectedItem || !selectedTrackId) {\n      return;\n    }\n\n    // Store a copy of the item in clipboard\n    this.clipboardItem.set({ ...selectedItem });\n    this.clipboardSourceTrackId.set(selectedTrackId);\n\n    this.notificationsComponent?.showNotification(\n      'Media copied to clipboard.',\n      'success'\n    );\n  }\n\n  /**\n   * Paste the clipboard media item at the playhead position.\n   * Pastes on the same track where the item was copied from.\n   * If there's no space at playhead position, finds the next available slot.\n   */\n  pasteMedia(): void {\n    const copiedItem = this.clipboardItem();\n    const sourceTrackId = this.clipboardSourceTrackId();\n\n    if (!copiedItem || !sourceTrackId) {\n      return;\n    }\n\n    const currentState = this.state();\n    const playheadTime = currentState.playheadPosition;\n    const totalDuration = currentState.totalDuration;\n\n    // Find the source track\n    let targetTrack = currentState.tracks.find(t => t.id === sourceTrackId);\n\n    // If source track no longer exists, use the first track\n    if (!targetTrack) {\n      targetTrack = currentState.tracks[0];\n      if (!targetTrack) {\n        this.notificationsComponent?.showNotification(\n          'No tracks available to paste media.',\n          'error'\n        );\n        return;\n      }\n    }\n\n    const itemDuration = copiedItem.duration;\n\n    // Try to find a valid position starting from playhead\n    const pastePosition = this.findPastePosition(\n      playheadTime,\n      itemDuration,\n      targetTrack.items,\n      totalDuration\n    );\n\n    if (pastePosition === null) {\n      this.notificationsComponent?.showNotification(\n        'No space available to paste media on this track.',\n        'warning'\n      );\n      return;\n    }\n\n    // Create a new item with a new ID\n    const newItem: MediaItem = {\n      ...copiedItem,\n      id: `item-${Date.now()}`,\n      startTime: pastePosition,\n      trackId: targetTrack.id\n    };\n\n    // Add the new item to the track\n    this.state.update(s => ({\n      ...s,\n      tracks: s.tracks.map(t =>\n        t.id === targetTrack!.id\n          ? { ...t, items: [...t.items, newItem] }\n          : t\n      )\n    }));\n\n    this.notificationsComponent?.showNotification(\n      'Media pasted successfully.',\n      'success'\n    );\n  }\n\n  /**\n   * Find a valid position to paste media item.\n   * First tries at the playhead position, then finds the next available gap.\n   */\n  private findPastePosition(\n    preferredPosition: number,\n    duration: number,\n    existingItems: MediaItem[],\n    totalDuration: number\n  ): number | null {\n    // Check if we can fit at the preferred position (playhead)\n    if (this.canFitAtPosition(preferredPosition, duration, existingItems, totalDuration)) {\n      return preferredPosition;\n    }\n\n    // Sort existing items by start time\n    const sortedItems = [...existingItems].sort((a, b) => a.startTime - b.startTime);\n\n    // Find all gaps on the track and try to place the item\n    const gaps = this.dragDropService.findAllGaps(sortedItems);\n\n    // First, try to find a gap that starts at or after the playhead\n    for (const gap of gaps) {\n      // Calculate actual gap size (considering totalDuration for infinite gaps)\n      const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n      const gapSize = effectiveGapEnd - gap.gapStart;\n\n      if (gap.gapStart >= preferredPosition && gapSize >= duration) {\n        return gap.gapStart;\n      }\n    }\n\n    // If no gap after playhead, try any gap that can fit the item\n    for (const gap of gaps) {\n      // Calculate actual gap size (considering totalDuration for infinite gaps)\n      const effectiveGapEnd = gap.gapEnd === Infinity ? totalDuration : gap.gapEnd;\n      const gapSize = effectiveGapEnd - gap.gapStart;\n\n      if (gapSize >= duration) {\n        return gap.gapStart;\n      }\n    }\n\n    // No suitable position found\n    return null;\n  }\n\n  /**\n   * Check if an item can fit at a specific position without overlapping.\n   */\n  private canFitAtPosition(\n    position: number,\n    duration: number,\n    existingItems: MediaItem[],\n    totalDuration: number\n  ): boolean {\n    // Check bounds\n    if (position < 0 || position + duration > totalDuration) {\n      return false;\n    }\n\n    // Check for overlaps with existing items\n    const endPosition = position + duration;\n    for (const item of existingItems) {\n      const itemEnd = item.startTime + item.duration;\n      // Check if there's an overlap\n      if (position < itemEnd && endPosition > item.startTime) {\n        return false;\n      }\n    }\n\n    return true;\n  }\n}\n","numLines":1230,"startLine":1,"totalLines":1230}}}
[2025-12-05T11:45:50.060Z] [INFO] {
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        "type": "text",
        "text": "Now I understand the issue! Let me update the todo and check when `seek` is called:"
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[2025-12-05T11:45:56.700Z] [INFO] {
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            {
              "content": "Understand the issue: Audio and video should only play when Play button is pressed",
              "activeForm": "Understanding the issue: Audio and video should only play when Play button is pressed",
              "status": "completed"
            },
            {
              "content": "Search for media playback code and identify where auto-play occurs",
              "activeForm": "Searching for media playback code and identifying where auto-play occurs",
              "status": "completed"
            },
            {
              "content": "Check PlaybackService for play/pause controls",
              "activeForm": "Checking PlaybackService for play/pause controls",
              "status": "completed"
            },
            {
              "content": "Find where media elements are added to timeline",
              "activeForm": "Finding where media elements are added to timeline",
              "status": "completed"
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            {
              "content": "Implement fix to prevent auto-play on media addition",
              "activeForm": "Implementing fix to prevent auto-play on media addition",
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            {
              "content": "Test the fix locally with audio and video files",
              "activeForm": "Testing the fix locally with audio and video files",
              "status": "pending"
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              "content": "Run local CI checks if available",
              "activeForm": "Running local CI checks if available",
              "status": "pending"
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            {
              "content": "Commit and push the fix",
              "activeForm": "Committing and pushing the fix",
              "status": "pending"
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            {
              "content": "Update PR description with solution details",
              "activeForm": "Updating PR description with solution details",
              "status": "pending"
            },
            {
              "content": "Verify CI checks are passing",
              "activeForm": "Verifying CI checks are passing",
              "status": "pending"
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            {
              "content": "Mark PR as ready for review",
              "activeForm": "Marking PR as ready for review",
              "status": "pending"
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          ]
        }
      }
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[2025-12-05T11:45:56.969Z] [INFO] {
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        "type": "tool_result",
        "content": "Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable"
      }
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      },
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        "content": "Search for media playback code and identify where auto-play occurs",
        "status": "pending",
        "activeForm": "Searching for media playback code and identifying where auto-play occurs"
      },
      {
        "content": "Check PlaybackService for play/pause controls",
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      },
      {
        "content": "Find where media elements are added to timeline",
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      {
        "content": "Implement fix to prevent auto-play on media addition",
        "status": "pending",
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      },
      {
        "content": "Test the fix locally with audio and video files",
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      },
      {
        "content": "Run local CI checks if available",
        "status": "pending",
        "activeForm": "Running local CI checks if available"
      },
      {
        "content": "Commit and push the fix",
        "status": "pending",
        "activeForm": "Committing and pushing the fix"
      },
      {
        "content": "Update PR description with solution details",
        "status": "pending",
        "activeForm": "Updating PR description with solution details"
      },
      {
        "content": "Verify CI checks are passing",
        "status": "pending",
        "activeForm": "Verifying CI checks are passing"
      },
      {
        "content": "Mark PR as ready for review",
        "status": "pending",
        "activeForm": "Marking PR as ready for review"
      }
    ],
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        "content": "Understand the issue: Audio and video should only play when Play button is pressed",
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      },
      {
        "content": "Search for media playback code and identify where auto-play occurs",
        "status": "completed",
        "activeForm": "Searching for media playback code and identifying where auto-play occurs"
      },
      {
        "content": "Check PlaybackService for play/pause controls",
        "status": "completed",
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      },
      {
        "content": "Find where media elements are added to timeline",
        "status": "completed",
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        "content": "Implement fix to prevent auto-play on media addition",
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        "content": "Test the fix locally with audio and video files",
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      },
      {
        "content": "Run local CI checks if available",
        "status": "pending",
        "activeForm": "Running local CI checks if available"
      },
      {
        "content": "Commit and push the fix",
        "status": "pending",
        "activeForm": "Committing and pushing the fix"
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      {
        "content": "Update PR description with solution details",
        "status": "pending",
        "activeForm": "Updating PR description with solution details"
      },
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        "content": "Verify CI checks are passing",
        "status": "pending",
        "activeForm": "Verifying CI checks are passing"
      },
      {
        "content": "Mark PR as ready for review",
        "status": "pending",
        "activeForm": "Marking PR as ready for review"
      }
    ]
  }
}
[2025-12-05T11:46:07.435Z] [INFO] {
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    "id": "msg_0158utYCJbbWizc7ypL1Wo5r",
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    "content": [
      {
        "type": "text",
        "text": "Now I understand the problem:\n\n**Root Cause Analysis:**\n\n1. In `PlaybackService.startMedia()` (lines 197-208), when a media element is created, `.play()` is immediately called on video and audio elements.\n\n2. `startMedia()` is called from `synchronizeMedia()` which is invoked when:\n   - The playback loop is running (during play) - this is expected\n   - When `seek()` is called (line 398) - **this causes auto-play when media is added**\n\n3. When a user adds media via the media library (`onMediaSelected()` at line 870), the media item is added to the timeline and the continuous render loop calls `playbackService.renderCurrentFrame()` which eventually calls `synchronizeMedia()` through the `seek()` method.\n\n**The Fix:**\n\nThe media should only call `.play()` when playback is actually active (`isPlaying()` is true). When seeking or just rendering frames while paused, the media elements should be created and positioned but not played.\n\nLet me implement the fix:"
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[2025-12-05T11:46:19.909Z] [INFO] {
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      {
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        "id": "toolu_017HLZ5WzZXvhHKMhYkaZfux",
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          "file_path": "/tmp/gh-issue-solver-1764934996954/video-timeline/src/app/services/playback.service.ts",
          "old_string": "  /**\n   * Start playing a media item\n   */\n  private startMedia(item: MediaItem, trackOrder: number, playheadTime: number): void {\n    if (!item.url) return;\n\n    const mediaStartTime = item.mediaStartTime || 0;\n    const offsetInItem = playheadTime - item.startTime;\n    const mediaTime = (mediaStartTime + offsetInItem) / 1000; // Convert to seconds\n\n    let element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n\n    switch (item.type) {\n      case MediaType.VIDEO:\n        element = document.createElement('video');\n        (element as HTMLVideoElement).src = item.url;\n        (element as HTMLVideoElement).currentTime = mediaTime;\n        (element as HTMLVideoElement).muted = false;\n        (element as HTMLVideoElement).play().catch(() => {\n          // Autoplay may be blocked, try muted\n          (element as HTMLVideoElement).muted = true;\n          (element as HTMLVideoElement).play().catch(() => {});\n        });\n        break;\n\n      case MediaType.AUDIO:\n        element = document.createElement('audio');\n        (element as HTMLAudioElement).src = item.url;\n        (element as HTMLAudioElement).currentTime = mediaTime;\n        (element as HTMLAudioElement).play().catch(() => {});\n        break;\n\n      case MediaType.IMAGE:\n        element = document.createElement('img');\n        (element as HTMLImageElement).src = item.url;\n        (element as HTMLImageElement).crossOrigin = 'anonymous';\n        break;\n\n      default:\n        return;\n    }\n\n    // For video, also set crossOrigin for canvas rendering\n    if (element instanceof HTMLVideoElement) {\n      element.crossOrigin = 'anonymous';\n    }\n\n    this.activeMediaMap.set(item.id, { item, element, trackOrder });\n  }",
          "new_string": "  /**\n   * Start playing a media item\n   */\n  private startMedia(item: MediaItem, trackOrder: number, playheadTime: number): void {\n    if (!item.url) return;\n\n    const mediaStartTime = item.mediaStartTime || 0;\n    const offsetInItem = playheadTime - item.startTime;\n    const mediaTime = (mediaStartTime + offsetInItem) / 1000; // Convert to seconds\n\n    let element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n\n    switch (item.type) {\n      case MediaType.VIDEO:\n        element = document.createElement('video');\n        (element as HTMLVideoElement).src = item.url;\n        (element as HTMLVideoElement).currentTime = mediaTime;\n        (element as HTMLVideoElement).muted = false;\n        // Only play if playback is active\n        if (this._isPlaying()) {\n          (element as HTMLVideoElement).play().catch(() => {\n            // Autoplay may be blocked, try muted\n            (element as HTMLVideoElement).muted = true;\n            (element as HTMLVideoElement).play().catch(() => {});\n          });\n        }\n        break;\n\n      case MediaType.AUDIO:\n        element = document.createElement('audio');\n        (element as HTMLAudioElement).src = item.url;\n        (element as HTMLAudioElement).currentTime = mediaTime;\n        // Only play if playback is active\n        if (this._isPlaying()) {\n          (element as HTMLAudioElement).play().catch(() => {});\n        }\n        break;\n\n      case MediaType.IMAGE:\n        element = document.createElement('img');\n        (element as HTMLImageElement).src = item.url;\n        (element as HTMLImageElement).crossOrigin = 'anonymous';\n        break;\n\n      default:\n        return;\n    }\n\n    // For video, also set crossOrigin for canvas rendering\n    if (element instanceof HTMLVideoElement) {\n      element.crossOrigin = 'anonymous';\n    }\n\n    this.activeMediaMap.set(item.id, { item, element, trackOrder });\n  }"
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[2025-12-05T11:46:20.382Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_017HLZ5WzZXvhHKMhYkaZfux","type":"tool_result","content":"The file /tmp/gh-issue-solver-1764934996954/video-timeline/src/app/services/playback.service.ts has been updated. Here's the result of running `cat -n` on a snippet of the edited file:\n   175→      }\n   176→    }\n   177→  }\n   178→\n   179→  /**\n   180→   * Start playing a media item\n   181→   */\n   182→  private startMedia(item: MediaItem, trackOrder: number, playheadTime: number): void {\n   183→    if (!item.url) return;\n   184→\n   185→    const mediaStartTime = item.mediaStartTime || 0;\n   186→    const offsetInItem = playheadTime - item.startTime;\n   187→    const mediaTime = (mediaStartTime + offsetInItem) / 1000; // Convert to seconds\n   188→\n   189→    let element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n   190→\n   191→    switch (item.type) {\n   192→      case MediaType.VIDEO:\n   193→        element = document.createElement('video');\n   194→        (element as HTMLVideoElement).src = item.url;\n   195→        (element as HTMLVideoElement).currentTime = mediaTime;\n   196→        (element as HTMLVideoElement).muted = false;\n   197→        // Only play if playback is active\n   198→        if (this._isPlaying()) {\n   199→          (element as HTMLVideoElement).play().catch(() => {\n   200→            // Autoplay may be blocked, try muted\n   201→            (element as HTMLVideoElement).muted = true;\n   202→            (element as HTMLVideoElement).play().catch(() => {});\n   203→          });\n   204→        }\n   205→        break;\n   206→\n   207→      case MediaType.AUDIO:\n   208→        element = document.createElement('audio');\n   209→        (element as HTMLAudioElement).src = item.url;\n   210→        (element as HTMLAudioElement).currentTime = mediaTime;\n   211→        // Only play if playback is active\n   212→        if (this._isPlaying()) {\n   213→          (element as HTMLAudi
[2025-12-05T11:46:20.566Z] [INFO] oElement).play().catch(() => {});\n   214→        }\n   215→        break;\n   216→\n   217→      case MediaType.IMAGE:\n   218→        element = document.createElement('img');\n   219→        (element as HTMLImageElement).src = item.url;\n   220→        (element as HTMLImageElement).crossOrigin = 'anonymous';\n   221→        break;\n   222→\n   223→      default:\n   224→        return;\n   225→    }\n   226→\n   227→    // For video, also set crossOrigin for canvas rendering\n   228→    if (element instanceof HTMLVideoElement) {\n   229→      element.crossOrigin = 'anonymous';\n   230→    }\n   231→\n   232→    this.activeMediaMap.set(item.id, { item, element, trackOrder });\n   233→  }\n   234→\n   235→  /**\n   236→   * Stop and cleanup a media element\n   237→   */"}]},"parent_tool_use_id":null,"session_id":"084914e4-263f-4bd0-8b1a-fcc69335a956","uuid":"e38822f4-4577-41f2-8e3b-54b41b7323cb","tool_use_result":{"filePath":"/tmp/gh-issue-solver-1764934996954/video-timeline/src/app/services/playback.service.ts","oldString":"  /**\n   * Start playing a media item\n   */\n  private startMedia(item: MediaItem, trackOrder: number, playheadTime: number): void {\n    if (!item.url) return;\n\n    const mediaStartTime = item.mediaStartTime || 0;\n    const offsetInItem = playheadTime - item.startTime;\n    const mediaTime = (mediaStartTime + offsetInItem) / 1000; // Convert to seconds\n\n    let element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n\n    switch (item.type) {\n      case MediaType.VIDEO:\n        element = document.createElement('video');\n        (element as HTMLVideoElement).src = item.url;\n        (element as HTMLVideoElement).currentTime = mediaTime;\n        (element as HTMLVideoElement).muted = false;\n        (element as HTMLVideoElement).play().catch(() => {\n          // Autoplay may be blocked, try muted\n          (element as HTMLVideoElement).muted = true;\n          (element as HTMLVideoElement).play().catch(() => {});\n        });\n        break;\n\n      case MediaType.AUDIO:\n        element = document.createElement('audio');\n        (element as HTMLAudioElement).src = item.url;\n        (element as HTMLAudioElement).currentTime = mediaTime;\n        (element as HTMLAudioElement).play().catch(() => {});\n        break;\n\n      case MediaType.IMAGE:\n        element = document.createElement('img');\n        (element as HTMLImageElement).src = item.url;\n        (element as HTMLImageElement).crossOrigin = 'anonymous';\n        break;\n\n      default:\n        return;\n    }\n\n    // For video, also set crossOrigin for canvas rendering\n    if (element instanceof HTMLVideoElement) {\n      element.crossOrigin = 'anonymous';\n    }\n\n    this.activeMediaMap.set(item.id, { item, element, trackOrder });\n  }","newString":"  /**\n   * Start playing a media item\n   */\n  private startMedia(item: MediaItem, trackOrder: number, playheadTime: number): void {\n    if (!item.url) return;\n\n    const mediaStartTime = item.mediaStartTime || 0;\n    const offsetInItem = playheadTime - item.startTime;\n    const mediaTime = (mediaStartTime + offsetInItem) / 1000; // Convert to seconds\n\n    let element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n\n    switch (item.type) {\n      case MediaType.VIDEO:\n        element = document.createElement('video');\n        (element as HTMLVideoElement).src = item.url;\n        (element as HTMLVideoElement).currentTime = mediaTime;\n        (element as HTMLVideoElement).muted = false;\n        // Only play if playback is active\n        if (this._isPlaying()) {\n          (element as HTMLVideoElement).play().catch(() => {\n            // Autoplay may be blocked, try muted\n            (element as HTMLVideoElement).muted = true;\n            (element as HTMLVideoElement).play().catch(() => {});\n          });\n        }\n        break;\n\n      case MediaType.AUDIO:\n        element = document.createElement('audio');\n        (element as HTMLAudioElement).src = item.url;\n        (element as HTMLAudioElement).currentTime = mediaTime;\n        // Only play if playback is active\n        if (this._isPlaying()) {\n          (element as HTMLAudioElement).play().catch(() => {});\n        }\n        break;\n\n      case MediaType.IMAGE:\n        element = document.createElement('img');\n        (element as HTMLImageElement).src = item.url;\n        (element as HTMLImageElement).crossOrigin = 'anonymous';\n        break;\n\n      default:\n        return;\n    }\n\n    // For video, also set crossOrigin for canvas rendering\n    if (element instanceof HTMLVideoElement) {\n      element.crossOrigin = 'anonymous';\n    }\n\n    this.activeMediaMap.set(item.id, { item, element, trackOrder });\n  }","originalFile":"import { Injectable, signal, computed } from '@angular/core';\nimport { MediaItem, MediaType, Track } from '../models/timeline.models';\n\n/**\n * Represents an active media element being played\n */\nexport interface ActiveMedia {\n  item: MediaItem;\n  element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n  trackOrder: number; // For layering: lower order = rendered first (bottom layer)\n}\n\n/**\n * Service responsible for managing real media playback.\n * Handles synchronization of media elements with timeline playhead position.\n */\n@Injectable({\n  providedIn: 'root'\n})\nexport class PlaybackService {\n  // Playback state\n  private _isPlaying = signal<boolean>(false);\n  private _playheadPosition = signal<number>(0);\n  private animationFrameId: number | null = null;\n  private lastFrameTime: number = 0;\n\n  // Active media elements\n  private activeMediaMap = new Map<string, ActiveMedia>();\n\n  // Canvas reference for rendering\n  private canvas: HTMLCanvasElement | null = null;\n  private canvasContext: Canva**************ext2D | null = null;\n\n  // Exposed signals\n  readonly isPlaying = this._isPlaying.asReadonly();\n  readonly playheadPosition = this._playheadPosition.asReadonly();\n\n  // Computed: current active media items for rendering\n  readonly activeMediaItems = computed(() => {\n    return Array.from(this.activeMediaMap.values())\n      .sort((a, b) => a.trackOrder - b.trackOrder);\n  });\n\n  constructor() {}\n\n  /**\n   * Set the canvas element for rendering video/image preview\n   */\n  setCanvas(canvas: HTMLCanvasElement): void {\n    this.canvas = canvas;\n    this.canvasContext = canvas.getContext('2d');\n  }\n\n  /**\n   * Update playhead position (called from timeline component)\n   */\n  setPlayheadPosition(position: number): void {\n    this._playheadPosition.set(position);\n  }\n\n  /**\n   * Start playback\n   */\n  play(tracks: Track[], totalDuration: number): void {\n    if (this._isPlaying()) return;\n\n    this._isPlaying.set(true);\n    this.lastFrameTime = performance.now();\n    this.startPlaybackLoop(tracks, totalDuration);\n  }\n\n  /**\n   * Pause playback\n   */\n  pause(): void {\n    this._isPlaying.set(false);\n    if (this.animationFrameId !== null) {\n      cancelAnimationFrame(this.animationFrameId);\n      this.animationFrameId = null;\n    }\n\n    // Pause all active media\n    for (const activeMedia of this.activeMediaMap.values()) {\n      if (activeMedia.element instanceof HTMLVideoElement ||\n          activeMedia.element instanceof HTMLAudioElement) {\n        activeMedia.element.pause();\n      }\n    }\n  }\n\n  /**\n   * Stop playback and reset position\n   */\n  stop(): void {\n    this.pause();\n    this._playheadPosition.set(0);\n    this.cleanupAllMedia();\n  }\n\n  /**\n   * Main playback loop - advances playhead and synchronizes media\n   */\n  private startPlaybackLoop(tracks: Track[], totalDuration: number): void {\n    const animate = (currentTime: number) => {\n      if (!this._isPlaying()) return;\n\n      // Calculate delta time\n      const deltaTime = currentTime - this.lastFrameTime;\n      this.lastFrameTime = currentTime;\n\n      // Update playhead position\n      let newPosition = this._playheadPosition() + deltaTime;\n\n      // Check if we've reached the end\n      if (newPosition >= totalDuration) {\n        newPosition = totalDuration;\n        this.pause();\n      }\n\n      this._playheadPosition.set(newPosition);\n\n      // Synchronize media with new position\n      this.synchronizeMedia(tracks, newPosition);\n\n      // Render to canvas\n      this.renderToCanvas();\n\n      // Continue animation loop\n      if (this._isPlaying()) {\n        this.animationFrameId = requestAnimationFrame(animate);\n      }\n    };\n\n    this.animationFrameId = requestAnimationFrame(animate);\n  }\n\n  /**\n   * Synchronize media elements with the current playhead position.\n   * Start/stop media as playhead enters/exits their time range.\n   */\n  private synchronizeMedia(tracks: Track[], playheadTime: number): void {\n    // Collect all items that should be active at current time\n    const shouldBeActive = new Map<string, { item: MediaItem; trackOrder: number }>();\n\n    for (const track of tracks) {\n      for (const item of track.items) {\n        const itemEnd = item.startTime + item.duration;\n\n        // Check if playhead is within item's time range\n        if (playheadTime >= item.startTime && playheadTime < itemEnd) {\n          // Skip placeholders without URL\n          if (item.isPlaceholder || !item.url) continue;\n\n          shouldBeActive.set(item.id, { item, trackOrder: track.order });\n        }\n      }\n    }\n\n    // Stop media that should no longer be active\n    for (const [id, activeMedia] of this.activeMediaMap.entries()) {\n      if (!shouldBeActive.has(id)) {\n        this.stopMedia(activeMedia);\n        this.activeMediaMap.delete(id);\n      }\n    }\n\n    // Start or update media that should be active\n    for (const [id, { item, trackOrder }] of shouldBeActive.entries()) {\n      if (!this.activeMediaMap.has(id)) {\n        // Start new media\n        this.startMedia(item, trackOrder, playheadTime);\n      } else {\n        // Update existing media position if needed\n        this.updateMediaPosition(this.activeMediaMap.get(id)!, playheadTime);\n      }\n    }\n  }\n\n  /**\n   * Start playing a media item\n   */\n  private startMedia(item: MediaItem, trackOrder: number, playheadTime: number): void {\n    if (!item.url) return;\n\n    const mediaStartTime = item.mediaStartTime || 0;\n    const offsetInItem = playheadTime - item.startTime;\n    const mediaTime = (mediaStartTime + offsetInItem) / 1000; // Convert to seconds\n\n    let element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n\n    switch (item.type) {\n      case MediaType.VIDEO:\n        element = document.createElement('video');\n        (element as HTMLVideoElement).src = item.url;\n        (element as HTMLVideoElement).currentTime = mediaTime;\n        (element as HTMLVideoElement).muted = false;\n        (element as HTMLVideoElement).play().catch(() => {\n          // Autoplay may be blocked, try muted\n          (element as HTMLVideoElement).muted = true;\n          (element as HTMLVideoElement).play().catch(() => {});\n        });\n        break;\n\n      case MediaType.AUDIO:\n        element = document.createElement('audio');\n        (element as HTMLAudioElement).src = item.url;\n        (element as HTMLAudioElement).currentTime = mediaTime;\n        (element as HTMLAudioElement).play().catch(() => {});\n        break;\n\n      case MediaType.IMAGE:\n        element = document.createElement('img');\n        (element as HTMLImageElement).src = item.url;\n        (element as HTMLImageElement).crossOrigin = 'anonymous';\n        break;\n\n      default:\n        return;\n    }\n\n    // For video, also set crossOrigin for canvas rendering\n    if (element instanceof HTMLVideoElement) {\n      element.crossOrigin = 'anonymous';\n    }\n\n    this.activeMediaMap.set(item.id, { item, element, trackOrder });\n  }\n\n  /**\n   * Stop and cleanup a media element\n   */\n  private stopMedia(activeMedia: ActiveMedia): void {\n    const { element } = activeMedia;\n\n    if (element instanceof HTMLVideoElement || element instanceof HTMLAudioElement) {\n      element.pause();\n      element.src = '';\n      element.load();\n    }\n  }\n\n  /**\n   * Update media playback position if it's out of sync\n   */\n  private updateMediaPosition(activeMedia: ActiveMedia, playheadTime: number): void {\n    const { item, element } = activeMedia;\n\n    if (element instanceof HTMLVideoElement || element instanceof HTMLAudioElement) {\n      const mediaStartTime = item.mediaStartTime || 0;\n      const offsetInItem = playheadTime - item.startTime;\n      const expectedMediaTime = (mediaStartTime + offsetInItem) / 1000;\n      const currentMediaTime = element.currentTime;\n\n      // If more than 0.3 seconds out of sync, seek to correct position\n      if (Math.abs(currentMediaTime - expectedMediaTime) > 0.3) {\n        element.currentTime = expectedMediaTime;\n      }\n    }\n  }\n\n  /**\n   * Render active media to canvas with proper layering\n   */\n  private renderToCanvas(): void {\n    if (!this.canvas || !this.canvasContext) return;\n\n    const ctx = this.canvasContext;\n    const canvasWidth = this.canvas.width;\n    const canvasHeight = this.canvas.height;\n\n    // Clear canvas\n    ctx.fillStyle = '#1a1a1a';\n    ctx.fillRect(0, 0, canvasWidth, canvasHeight);\n\n    // Get active media sorted by track order (lower order = bottom layer)\n    const sortedMedia = Array.from(this.activeMediaMap.values())\n      .sort((a, b) => a.trackOrder - b.trackOrder);\n\n    // Render each media item\n    for (const activeMedia of sortedMedia) {\n      this.renderMediaItem(activeMedia, ctx, canvasWidth, canvasHeight);\n    }\n  }\n\n  /**\n   * Render a single media item to canvas with proper scaling\n   */\n  private renderMediaItem(\n    activeMedia: ActiveMedia,\n    ctx: CanvasRenderingContext2D,\n    canvasWidth: number,\n    canvasHeight: number\n  ): void {\n    const { element, item } = activeMedia;\n\n    // Only render video and image types\n    if (item.type === MediaType.AUDIO) return;\n\n    let source: CanvasImageSource | null = null;\n    let sourceWidth = 0;\n    let sourceHeight = 0;\n\n    if (element instanceof HTMLVideoElement) {\n      // Check if video has loaded enough to render\n      if (element.readyState < 2) return;\n      source = element;\n      sourceWidth = element.videoWidth;\n      sourceHeight = element.videoHeight;\n    } else if (element instanceof HTMLImageElement) {\n      // Check if image is loaded\n      if (!element.complete || element.naturalWidth === 0) return;\n      source = element;\n      sourceWidth = element.naturalWidth;\n      sourceHeight = element.naturalHeight;\n    }\n\n    if (!source || sourceWidth === 0 || sourceHeight === 0) return;\n\n    // Calculate scaled dimensions maintaining aspect ratio\n    const { width, height, x, y } = this.calculateScaledDimensions(\n      sourceWidth,\n      sourceHeight,\n      canvasWidth,\n      canvasHeight\n    );\n\n    // Draw the media\n    ctx.drawImage(source, x, y, width, height);\n  }\n\n  /**\n   * Calculate dimensions for media that fit within canvas while preserving aspect ratio\n   */\n  private calculateScaledDimensions(\n    sourceWidth: number,\n    sourceHeight: number,\n    canvasWidth: number,\n    canvasHeight: number\n  ): { width: number; height: number; x: number; y: number } {\n    const sourceAspect = sourceWidth / sourceHeight;\n    const canvasAspect = canvasWidth / canvasHeight;\n\n    let width: number;\n    let height: number;\n\n    if (sourceAspect > canvasAspect) {\n      // Source is wider - fit to width\n      width = canvasWidth;\n      height = canvasWidth / sourceAspect;\n    } else {\n      // Source is taller - fit to height\n      height = canvasHeight;\n      width = canvasHeight * sourceAspect;\n    }\n\n    // Center the media\n    const x = (canvasWidth - width) / 2;\n    const y = (canvasHeight - height) / 2;\n\n    return { width, height, x, y };\n  }\n\n  /**\n   * Cleanup all active media\n   */\n  private cleanupAllMedia(): void {\n    for (const activeMedia of this.activeMediaMap.values()) {\n      this.stopMedia(activeMedia);\n    }\n    this.activeMediaMap.clear();\n  }\n\n  /**\n   * Seek to a specific position and update media accordingly\n   */\n  seek(tracks: Track[], position: number): void {\n    this._playheadPosition.set(position);\n\n    // Update all active media positions\n    for (const activeMedia of this.activeMediaMap.values()) {\n      const { item, element } = activeMedia;\n      const itemEnd = item.startTime + item.duration;\n\n      // Check if media should still be active at new position\n      if (position < item.startTime || position >= itemEnd) {\n        // Media should no longer be active\n        this.stopMedia(activeMedia);\n        this.activeMediaMap.delete(item.id);\n      } else if (element instanceof HTMLVideoElement || element instanceof HTMLAudioElement) {\n        // Seek to correct position in media\n        const mediaStartTime = item.mediaStartTime || 0;\n        const offsetInItem = position - item.startTime;\n        element.currentTime = (mediaStartTime + offsetInItem) / 1000;\n      }\n    }\n\n    // Synchronize to add any new media that should be active\n    this.synchronizeMedia(tracks, position);\n\n    // Render current frame\n    this.renderToCanvas();\n  }\n\n  /**\n   * Force render the current state to canvas (useful when paused)\n   */\n  renderCurrentFrame(): void {\n    this.renderToCanvas();\n  }\n}\n","structuredPatch":[{"oldStart":194,"oldLines":18,"newStart":194,"newLines":24,"lines":["         (element as HTMLVideoElement).src = item.url;","         (element as HTMLVideoElement).currentTime = mediaTime;","         (element as HTMLVideoElement).muted = false;","-        (element as HTMLVideoElement).play().catch(() => {","-          // Autoplay may be blocked, try muted","-          (element as HTMLVideoElement).muted = true;","-          (element as HTMLVideoElement).play().catch(() => {});","-        });","+        // Only play if playback is active","+        if (this._isPlaying()) {","+          (element as HTMLVideoElement).play().catch(() => {","+            // Autoplay may be blocked, try muted","+            (element as HTMLVideoElement).muted = true;","+            (element as HTMLVideoElement).play().catch(() => {});","+          });","+        }","         break;"," ","       case MediaType.AUDIO:","         element = document.createElement('audio');","         (element as HTMLAudioElement).src = item.url;","         (element as HTMLAudioElement).currentTime = mediaTime;","-        (element as HTMLAudioElement).play().catch(() => {});","+        // Only play if playback is active","+        if (this._isPlaying()) {","+          (element as HTMLAudioElement).play().catch(() => {});","+        }","         break;"," ","       case MediaType.IMAGE:"]}],"userModified":false,"replaceAll":false}}
[2025-12-05T11:46:25.837Z] [INFO] {
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[2025-12-05T11:46:27.222Z] [INFO] {
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        "content": "    60→\n    61→  /**\n    62→   * Start playback\n    63→   */\n    64→  play(tracks: Track[], totalDuration: number): void {\n    65→    if (this._isPlaying()) return;\n    66→\n    67→    this._isPlaying.set(true);\n    68→    this.lastFrameTime = performance.now();\n    69→    this.startPlaybackLoop(tracks, totalDuration);\n    70→  }\n    71→\n    72→  /**\n    73→   * Pause playback\n    74→   */\n    75→  pause(): void {\n    76→    this._isPlaying.set(false);\n    77→    if (this.animationFrameId !== null) {\n    78→      cancelAnimationFrame(this.animationFrameId);\n    79→      this.animationFrameId = null;\n    80→    }\n    81→\n    82→    // Pause all active media\n    83→    for (const activeMedia of this.activeMediaMap.values()) {\n    84→      if (activeMedia.element instanceof HTMLVideoElement ||\n    85→          activeMedia.element instanceof HTMLAudioElement) {\n    86→        activeMedia.element.pause();\n    87→      }\n    88→    }\n    89→  }\n    90→\n    91→  /**\n    92→   * Stop playback and reset position\n    93→   */\n    94→  stop(): void {\n    95→    this.pause();\n    96→    this._playheadPosition.set(0);\n    97→    this.cleanupAllMedia();\n    98→  }\n    99→\n   100→  /**\n   101→   * Main playback loop - advances playhead and synchronizes media\n   102→   */\n   103→  private startPlaybackLoop(tracks: Track[], totalDuration: number): void {\n   104→    const animate = (currentTime: number) => {\n   105→      if (!this._isPlaying()) return;\n   106→\n   107→      // Calculate delta time\n   108→      const deltaTime = currentTime - this.lastFrameTime;\n   109→      this.lastFrameTime = currentTime;\n   110→\n   111→      // Update playhead position\n   112→      let newPosition = this._playheadPosition() + deltaTime;\n   113→\n   114→      // Check if we've reached the end\n   115→      if (newPosition >= totalDuration) {\n   116→        newPosition = totalDuration;\n   117→        this.pause();\n   118→      }\n   119→\n   120→      this._playheadPosition.set(newPosition);\n   121→\n   122→      // Synchronize media with new position\n   123→      this.synchronizeMedia(tracks, newPosition);\n   124→\n   125→      // Render to canvas\n   126→      this.renderToCanvas();\n   127→\n   128→      // Continue animation loop\n   129→      if (this._isPlaying()) {\n   130→        this.animationFrameId = requestAnimationFrame(animate);\n   131→      }\n   132→    };\n   133→\n   134→    this.animationFrameId = requestAnimationFrame(animate);\n   135→  }\n   136→\n   137→  /**\n   138→   * Synchronize media elements with the current playhead position.\n   139→   * Start/stop media as playhead enters/exits their time range.\n   140→   */\n   141→  private synchronizeMedia(tracks: Track[], playheadTime: number): void {\n   142→    // Collect all items that should be active at current time\n   143→    const shouldBeActive = new Map<string, { item: MediaItem; trackOrder: number }>();\n   144→\n   145→    for (const track of tracks) {\n   146→      for (const item of track.items) {\n   147→        const itemEnd = item.startTime + item.duration;\n   148→\n   149→        // Check if playhead is within item's time range\n   150→        if (playheadTime >= item.startTime && playheadTime < itemEnd) {\n   151→          // Skip placeholders without URL\n   152→          if (item.isPlaceholder || !item.url) continue;\n   153→\n   154→          shouldBeActive.set(item.id, { item, trackOrder: track.order });\n   155→        }\n   156→      }\n   157→    }\n   158→\n   159→    // Stop media that should no longer be active\n   160→    for (const [id, activeMedia] of this.activeMediaMap.entries()) {\n   161→      if (!shouldBeActive.has(id)) {\n   162→        this.stopMedia(activeMedia);\n   163→        this.activeMediaMap.delete(id);\n   164→      }\n   165→    }\n   166→\n   167→    // Start or update media that should be active\n   168→    for (const [id, { item, trackOrder }] of shouldBeActive.entries()) {\n   169→      if (!this.activeMediaMap.has(id)) {\n   170→        // Start new media\n   171→        this.startMedia(item, trackOrder, playheadTime);\n   172→      } else {\n   173→        // Update existing media position if needed\n   174→        this.updateMediaPosition(this.activeMediaMap.get(id)!, playheadTime);\n   175→      }\n   176→    }\n   177→  }\n   178→\n   179→  /**\n   180→   * Start playing a media item\n   181→   */\n   182→  private startMedia(item: MediaItem, trackOrder: number, playheadTime: number): void {\n   183→    if (!item.url) return;\n   184→\n   185→    const mediaStartTime = item.mediaStartTime || 0;\n   186→    const offsetInItem = playheadTime - item.startTime;\n   187→    const mediaTime = (mediaStartTime + offsetInItem) / 1000; // Convert to seconds\n   188→\n   189→    let element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n   190→\n   191→    switch (item.type) {\n   192→      case MediaType.VIDEO:\n   193→        element = document.createElement('video');\n   194→        (element as HTMLVideoElement).src = item.url;\n   195→        (element as HTMLVideoElement).currentTime = mediaTime;\n   196→        (element as HTMLVideoElement).muted = false;\n   197→        // Only play if playback is active\n   198→        if (this._isPlaying()) {\n   199→          (element as HTMLVideoElement).play().catch(() => {\n   200→            // Autoplay may be blocked, try muted\n   201→            (element as HTMLVideoElement).muted = true;\n   202→            (element as HTMLVideoElement).play().catch(() => {});\n   203→          });\n   204→        }\n   205→        break;\n   206→\n   207→      case MediaType.AUDIO:\n   208→        element = document.createElement('audio');\n   209→        (element as HTMLAudioElement).src = item.url;\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"
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      "content": "\n  /**\n   * Start playback\n   */\n  play(tracks: Track[], totalDuration: number): void {\n    if (this._isPlaying()) return;\n\n    this._isPlaying.set(true);\n    this.lastFrameTime = performance.now();\n    this.startPlaybackLoop(tracks, totalDuration);\n  }\n\n  /**\n   * Pause playback\n   */\n  pause(): void {\n    this._isPlaying.set(false);\n    if (this.animationFrameId !== null) {\n      cancelAnimationFrame(this.animationFrameId);\n      this.animationFrameId = null;\n    }\n\n    // Pause all active media\n    for (const activeMedia of this.activeMediaMap.values()) {\n      if (activeMedia.element instanceof HTMLVideoElement ||\n          activeMedia.element instanceof HTMLAudioElement) {\n        activeMedia.element.pause();\n      }\n    }\n  }\n\n  /**\n   * Stop playback and reset position\n   */\n  stop(): void {\n    this.pause();\n    this._playheadPosition.set(0);\n    this.cleanupAllMedia();\n  }\n\n  /**\n   * Main playback loop - advances playhead and synchronizes media\n   */\n  private startPlaybackLoop(tracks: Track[], totalDuration: number): void {\n    const animate = (currentTime: number) => {\n      if (!this._isPlaying()) return;\n\n      // Calculate delta time\n      const deltaTime = currentTime - this.lastFrameTime;\n      this.lastFrameTime = currentTime;\n\n      // Update playhead position\n      let newPosition = this._playheadPosition() + deltaTime;\n\n      // Check if we've reached the end\n      if (newPosition >= totalDuration) {\n        newPosition = totalDuration;\n        this.pause();\n      }\n\n      this._playheadPosition.set(newPosition);\n\n      // Synchronize media with new position\n      this.synchronizeMedia(tracks, newPosition);\n\n      // Render to canvas\n      this.renderToCanvas();\n\n      // Continue animation loop\n      if (this._isPlaying()) {\n        this.animationFrameId = requestAnimationFrame(animate);\n      }\n    };\n\n    this.animationFrameId = requestAnimationFrame(animate);\n  }\n\n  /**\n   * Synchronize media elements with the current playhead position.\n   * Start/stop media as playhead enters/exits their time range.\n   */\n  private synchronizeMedia(tracks: Track[], playheadTime: number): void {\n    // Collect all items that should be active at current time\n    const shouldBeActive = new Map<string, { item: MediaItem; trackOrder: number }>();\n\n    for (const track of tracks) {\n      for (const item of track.items) {\n        const itemEnd = item.startTime + item.duration;\n\n        // Check if playhead is within item's time range\n        if (playheadTime >= item.startTime && playheadTime < itemEnd) {\n          // Skip placeholders without URL\n          if (item.isPlaceholder || !item.url) continue;\n\n          shouldBeActive.set(item.id, { item, trackOrder: track.order });\n        }\n      }\n    }\n\n    // Stop media that should no longer be active\n    for (const [id, activeMedia] of this.activeMediaMap.entries()) {\n      if (!shouldBeActive.has(id)) {\n        this.stopMedia(activeMedia);\n        this.activeMediaMap.delete(id);\n      }\n    }\n\n    // Start or update media that should be active\n    for (const [id, { item, trackOrder }] of shouldBeActive.entries()) {\n      if (!this.activeMediaMap.has(id)) {\n        // Start new media\n        this.startMedia(item, trackOrder, playheadTime);\n      } else {\n        // Update existing media position if needed\n        this.updateMediaPosition(this.activeMediaMap.get(id)!, playheadTime);\n      }\n    }\n  }\n\n  /**\n   * Start playing a media item\n   */\n  private startMedia(item: MediaItem, trackOrder: number, playheadTime: number): void {\n    if (!item.url) return;\n\n    const mediaStartTime = item.mediaStartTime || 0;\n    const offsetInItem = playheadTime - item.startTime;\n    const mediaTime = (mediaStartTime + offsetInItem) / 1000; // Convert to seconds\n\n    let element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n\n    switch (item.type) {\n      case MediaType.VIDEO:\n        element = document.createElement('video');\n        (element as HTMLVideoElement).src = item.url;\n        (element as HTMLVideoElement).currentTime = mediaTime;\n        (element as HTMLVideoElement).muted = false;\n        // Only play if playback is active\n        if (this._isPlaying()) {\n          (element as HTMLVideoElement).play().catch(() => {\n            // Autoplay may be blocked, try muted\n            (element as HTMLVideoElement).muted = true;\n            (element as HTMLVideoElement).play().catch(() => {});\n          });\n        }\n        break;\n\n      case MediaType.AUDIO:\n        element = document.createElement('audio');\n        (element as HTMLAudioElement).src = item.url;",
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[2025-12-05T11:46:31.396Z] [INFO] {
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      {
        "type": "text",
        "text": "I need to add logic to the `play()` method to start playing any already-loaded media elements when the Play button is pressed. Let me update the `play()` method:"
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[2025-12-05T11:46:35.134Z] [INFO] {
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          "file_path": "/tmp/gh-issue-solver-1764934996954/video-timeline/src/app/services/playback.service.ts",
          "old_string": "  /**\n   * Start playback\n   */\n  play(tracks: Track[], totalDuration: number): void {\n    if (this._isPlaying()) return;\n\n    this._isPlaying.set(true);\n    this.lastFrameTime = performance.now();\n    this.startPlaybackLoop(tracks, totalDuration);\n  }",
          "new_string": "  /**\n   * Start playback\n   */\n  play(tracks: Track[], totalDuration: number): void {\n    if (this._isPlaying()) return;\n\n    this._isPlaying.set(true);\n\n    // Start playing any already-loaded media elements\n    for (const activeMedia of this.activeMediaMap.values()) {\n      if (activeMedia.element instanceof HTMLVideoElement) {\n        activeMedia.element.play().catch(() => {\n          // Autoplay may be blocked, try muted\n          activeMedia.element.muted = true;\n          (activeMedia.element as HTMLVideoElement).play().catch(() => {});\n        });\n      } else if (activeMedia.element instanceof HTMLAudioElement) {\n        activeMedia.element.play().catch(() => {});\n      }\n    }\n\n    this.lastFrameTime = performance.now();\n    this.startPlaybackLoop(tracks, totalDuration);\n  }"
        }
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[2025-12-05T11:46:35.477Z] [INFO] {
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        "type": "tool_result",
        "content": "The file /tmp/gh-issue-solver-1764934996954/video-timeline/src/app/services/playback.service.ts has been updated. Here's the result of running `cat -n` on a snippet of the edited file:\n    57→  setPlayheadPosition(position: number): void {\n    58→    this._playheadPosition.set(position);\n    59→  }\n    60→\n    61→  /**\n    62→   * Start playback\n    63→   */\n    64→  play(tracks: Track[], totalDuration: number): void {\n    65→    if (this._isPlaying()) return;\n    66→\n    67→    this._isPlaying.set(true);\n    68→\n    69→    // Start playing any already-loaded media elements\n    70→    for (const activeMedia of this.activeMediaMap.values()) {\n    71→      if (activeMedia.element instanceof HTMLVideoElement) {\n    72→        activeMedia.element.play().catch(() => {\n    73→          // Autoplay may be blocked, try muted\n    74→          activeMedia.element.muted = true;\n    75→          (activeMedia.element as HTMLVideoElement).play().catch(() => {});\n    76→        });\n    77→      } else if (activeMedia.element instanceof HTMLAudioElement) {\n    78→        activeMedia.element.play().catch(() => {});\n    79→      }\n    80→    }\n    81→\n    82→    this.lastFrameTime = performance.now();\n    83→    this.startPlaybackLoop(tracks, totalDuration);\n    84→  }\n    85→\n    86→  /**\n    87→   * Pause playback\n    88→   */"
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    "filePath": "/tmp/gh-issue-solver-1764934996954/video-timeline/src/app/services/playback.service.ts",
    "oldString": "  /**\n   * Start playback\n   */\n  play(tracks: Track[], totalDuration: number): void {\n    if (this._isPlaying()) return;\n\n    this._isPlaying.set(true);\n    this.lastFrameTime = performance.now();\n    this.startPlaybackLoop(tracks, totalDuration);\n  }",
    "newString": "  /**\n   * Start playback\n   */\n  play(tracks: Track[], totalDuration: number): void {\n    if (this._isPlaying()) return;\n\n    this._isPlaying.set(true);\n\n    // Start playing any already-loaded media elements\n    for (const activeMedia of this.activeMediaMap.values()) {\n      if (activeMedia.element instanceof HTMLVideoElement) {\n        activeMedia.element.play().catch(() => {\n          // Autoplay may be blocked, try muted\n          activeMedia.element.muted = true;\n          (activeMedia.element as HTMLVideoElement).play().catch(() => {});\n        });\n      } else if (activeMedia.element instanceof HTMLAudioElement) {\n        activeMedia.element.play().catch(() => {});\n      }\n    }\n\n    this.lastFrameTime = performance.now();\n    this.startPlaybackLoop(tracks, totalDuration);\n  }",
    "originalFile": "import { Injectable, signal, computed } from '@angular/core';\nimport { MediaItem, MediaType, Track } from '../models/timeline.models';\n\n/**\n * Represents an active media element being played\n */\nexport interface ActiveMedia {\n  item: MediaItem;\n  element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n  trackOrder: number; // For layering: lower order = rendered first (bottom layer)\n}\n\n/**\n * Service responsible for managing real media playback.\n * Handles synchronization of media elements with timeline playhead position.\n */\n@Injectable({\n  providedIn: 'root'\n})\nexport class PlaybackService {\n  // Playback state\n  private _isPlaying = signal<boolean>(false);\n  private _playheadPosition = signal<number>(0);\n  private animationFrameId: number | null = null;\n  private lastFrameTime: number = 0;\n\n  // Active media elements\n  private activeMediaMap = new Map<string, ActiveMedia>();\n\n  // Canvas reference for rendering\n  private canvas: HTMLCanvasElement | null = null;\n  private canvasContext: Canva**************ext2D | null = null;\n\n  // Exposed signals\n  readonly isPlaying = this._isPlaying.asReadonly();\n  readonly playheadPosition = this._playheadPosition.asReadonly();\n\n  // Computed: current active media items for rendering\n  readonly activeMediaItems = computed(() => {\n    return Array.from(this.activeMediaMap.values())\n      .sort((a, b) => a.trackOrder - b.trackOrder);\n  });\n\n  constructor() {}\n\n  /**\n   * Set the canvas element for rendering video/image preview\n   */\n  setCanvas(canvas: HTMLCanvasElement): void {\n    this.canvas = canvas;\n    this.canvasContext = canvas.getContext('2d');\n  }\n\n  /**\n   * Update playhead position (called from timeline component)\n   */\n  setPlayheadPosition(position: number): void {\n    this._playheadPosition.set(position);\n  }\n\n  /**\n   * Start playback\n   */\n  play(tracks: Track[], totalDuration: number): void {\n    if (this._isPlaying()) return;\n\n    this._isPlaying.set(true);\n    this.lastFrameTime = performance.now();\n    this.startPlaybackLoop(tracks, totalDuration);\n  }\n\n  /**\n   * Pause playback\n   */\n  pause(): void {\n    this._isPlaying.set(false);\n    if (this.animationFrameId !== null) {\n      cancelAnimationFrame(this.animationFrameId);\n      this.animationFrameId = null;\n    }\n\n    // Pause all active media\n    for (const activeMedia of this.activeMediaMap.values()) {\n      if (activeMedia.element instanceof HTMLVideoElement ||\n          activeMedia.element instanceof HTMLAudioElement) {\n        activeMedia.element.pause();\n      }\n    }\n  }\n\n  /**\n   * Stop playback and reset position\n   */\n  stop(): void {\n    this.pause();\n    this._playheadPosition.set(0);\n    this.cleanupAllMedia();\n  }\n\n  /**\n   * Main playback loop - advances playhead and synchronizes media\n   */\n  private startPlaybackLoop(tracks: Track[], totalDuration: number): void {\n    const animate = (currentTime: number) => {\n      if (!this._isPlaying()) return;\n\n      // Calculate delta time\n      const deltaTime = currentTime - this.lastFrameTime;\n      this.lastFrameTime = currentTime;\n\n      // Update playhead position\n      let newPosition = this._playheadPosition() + deltaTime;\n\n      // Check if we've reached the end\n      if (newPosition >= totalDuration) {\n        newPosition = totalDuration;\n        this.pause();\n      }\n\n      this._playheadPosition.set(newPosition);\n\n      // Synchronize media with new position\n      this.synchronizeMedia(tracks, newPosition);\n\n      // Render to canvas\n      this.renderToCanvas();\n\n      // Continue animation loop\n      if (this._isPlaying()) {\n        this.animationFrameId = requestAnimationFrame(animate);\n      }\n    };\n\n    this.animationFrameId = requestAnimationFrame(animate);\n  }\n\n  /**\n   * Synchronize media elements with the current playhead position.\n   * Start/stop media as playhead enters/exits their time range.\n   */\n  private synchronizeMedia(tracks: Track[], playheadTime: number): void {\n    // Collect all items that should be active at current time\n    const shouldBeActive = new Map<string, { item: MediaItem; trackOrder: number }>();\n\n    for (const track of tracks) {\n      for (const item of track.items) {\n        const itemEnd = item.startTime + item.duration;\n\n        // Check if playhead is within item's time range\n        if (playheadTime >= item.startTime && playheadTime < itemEnd) {\n          // Skip placeholders without URL\n          if (item.isPlaceholder || !item.url) continue;\n\n          shouldBeActive.set(item.id, { item, trackOrder: track.order });\n        }\n      }\n    }\n\n    // Stop media that should no longer be active\n    for (const [id, activeMedia] of this.activeMediaMap.entries()) {\n      if (!shouldBeActive.has(id)) {\n        this.stopMedia(activeMedia);\n        this.activeMediaMap.delete(id);\n      }\n    }\n\n    // Start or update media that should be active\n    for (const [id, { item, trackOrder }] of shouldBeActive.entries()) {\n      if (!this.activeMediaMap.has(id)) {\n        // Start new media\n        this.startMedia(item, trackOrder, playheadTime);\n      } else {\n        // Update existing media position if needed\n        this.updateMediaPosition(this.activeMediaMap.get(id)!, playheadTime);\n      }\n    }\n  }\n\n  /**\n   * Start playing a media item\n   */\n  private startMedia(item: MediaItem, trackOrder: number, playheadTime: number): void {\n    if (!item.url) return;\n\n    const mediaStartTime = item.mediaStartTime || 0;\n    const offsetInItem = playheadTime - item.startTime;\n    const mediaTime = (mediaStartTime + offsetInItem) / 1000; // Convert to seconds\n\n    let element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n\n    switch (item.type) {\n      case MediaType.VIDEO:\n        element = document.createElement('video');\n        (element as HTMLVideoElement).src = item.url;\n        (element as HTMLVideoElement).currentTime = mediaTime;\n        (element as HTMLVideoElement).muted = false;\n        // Only play if playback is active\n        if (this._isPlaying()) {\n          (element as HTMLVideoElement).play().catch(() => {\n            // Autoplay may be blocked, try muted\n            (element as HTMLVideoElement).muted = true;\n            (element as HTMLVideoElement).play().catch(() => {});\n          });\n        }\n        break;\n\n      case MediaType.AUDIO:\n        element = document.createElement('audio');\n        (element as HTMLAudioElement).src = item.url;\n        (element as HTMLAudioElement).currentTime = mediaTime;\n        // Only play if playback is active\n        if (this._isPlaying()) {\n          (element as HTMLAudioElement).play().catch(() => {});\n        }\n        break;\n\n      case MediaType.IMAGE:\n        element = document.createElement('img');\n        (element as HTMLImageElement).src = item.url;\n        (element as HTMLImageElement).crossOrigin = 'anonymous';\n        break;\n\n      default:\n        return;\n    }\n\n    // For video, also set crossOrigin for canvas rendering\n    if (element instanceof HTMLVideoElement) {\n      element.crossOrigin = 'anonymous';\n    }\n\n    this.activeMediaMap.set(item.id, { item, element, trackOrder });\n  }\n\n  /**\n   * Stop and cleanup a media element\n   */\n  private stopMedia(activeMedia: ActiveMedia): void {\n    const { element } = activeMedia;\n\n    if (element instanceof HTMLVideoElement || element instanceof HTMLAudioElement) {\n      element.pause();\n      element.src = '';\n      element.load();\n    }\n  }\n\n  /**\n   * Update media playback position if it's out of sync\n   */\n  private updateMediaPosition(activeMedia: ActiveMedia, playheadTime: number): void {\n    const { item, element } = activeMedia;\n\n    if (element instanceof HTMLVideoElement || element instanceof HTMLAudioElement) {\n      const mediaStartTime = item.mediaStartTime || 0;\n      const offsetInItem = playheadTime - item.startTime;\n      const expectedMediaTime = (mediaStartTime + offsetInItem) / 1000;\n      const currentMediaTime = element.currentTime;\n\n      // If more than 0.3 seconds out of sync, seek to correct position\n      if (Math.abs(currentMediaTime - expectedMediaTime) > 0.3) {\n        element.currentTime = expectedMediaTime;\n      }\n    }\n  }\n\n  /**\n   * Render active media to canvas with proper layering\n   */\n  private renderToCanvas(): void {\n    if (!this.canvas || !this.canvasContext) return;\n\n    const ctx = this.canvasContext;\n    const canvasWidth = this.canvas.width;\n    const canvasHeight = this.canvas.height;\n\n    // Clear canvas\n    ctx.fillStyle = '#1a1a1a';\n    ctx.fillRect(0, 0, canvasWidth, canvasHeight);\n\n    // Get active media sorted by track order (lower order = bottom layer)\n    const sortedMedia = Array.from(this.activeMediaMap.values())\n      .sort((a, b) => a.trackOrder - b.trackOrder);\n\n    // Render each media item\n    for (const activeMedia of sortedMedia) {\n      this.renderMediaItem(activeMedia, ctx, canvasWidth, canvasHeight);\n    }\n  }\n\n  /**\n   * Render a single media item to canvas with proper scaling\n   */\n  private renderMediaItem(\n    activeMedia: ActiveMedia,\n    ctx: CanvasRenderingContext2D,\n    canvasWidth: number,\n    canvasHeight: number\n  ): void {\n    const { element, item } = activeMedia;\n\n    // Only render video and image types\n    if (item.type === MediaType.AUDIO) return;\n\n    let source: CanvasImageSource | null = null;\n    let sourceWidth = 0;\n    let sourceHeight = 0;\n\n    if (element instanceof HTMLVideoElement) {\n      // Check if video has loaded enough to render\n      if (element.readyState < 2) return;\n      source = element;\n      sourceWidth = element.videoWidth;\n      sourceHeight = element.videoHeight;\n    } else if (element instanceof HTMLImageElement) {\n      // Check if image is loaded\n      if (!element.complete || element.naturalWidth === 0) return;\n      source = element;\n      sourceWidth = element.naturalWidth;\n      sourceHeight = element.naturalHeight;\n    }\n\n    if (!source || sourceWidth === 0 || sourceHeight === 0) return;\n\n    // Calculate scaled dimensions maintaining aspect ratio\n    const { width, height, x, y } = this.calculateScaledDimensions(\n      sourceWidth,\n      sourceHeight,\n      canvasWidth,\n      canvasHeight\n    );\n\n    // Draw the media\n    ctx.drawImage(source, x, y, width, height);\n  }\n\n  /**\n   * Calculate dimensions for media that fit within canvas while preserving aspect ratio\n   */\n  private calculateScaledDimensions(\n    sourceWidth: number,\n    sourceHeight: number,\n    canvasWidth: number,\n    canvasHeight: number\n  ): { width: number; height: number; x: number; y: number } {\n    const sourceAspect = sourceWidth / sourceHeight;\n    const canvasAspect = canvasWidth / canvasHeight;\n\n    let width: number;\n    let height: number;\n\n    if (sourceAspect > canvasAspect) {\n      // Source is wider - fit to width\n      width = canvasWidth;\n      height = canvasWidth / sourceAspect;\n    } else {\n      // Source is taller - fit to height\n      height = canvasHeight;\n      width = canvasHeight * sourceAspect;\n    }\n\n    // Center the media\n    const x = (canvasWidth - width) / 2;\n    const y = (canvasHeight - height) / 2;\n\n    return { width, height, x, y };\n  }\n\n  /**\n   * Cleanup all active media\n   */\n  private cleanupAllMedia(): void {\n    for (const activeMedia of this.activeMediaMap.values()) {\n      this.stopMedia(activeMedia);\n    }\n    this.activeMediaMap.clear();\n  }\n\n  /**\n   * Seek to a specific position and update media accordingly\n   */\n  seek(tracks: Track[], position: number): void {\n    this._playheadPosition.set(position);\n\n    // Update all active media positions\n    for (const activeMedia of this.activeMediaMap.values()) {\n      const { item, element } = activeMedia;\n      const itemEnd = item.startTime + item.duration;\n\n      // Check if media should still be active at new position\n      if (position < item.startTime || position >= itemEnd) {\n        // Media should no longer be active\n        this.stopMedia(activeMedia);\n        this.activeMediaMap.delete(item.id);\n      } else if (element instanceof HTMLVideoElement || element instanceof HTMLAudioElement) {\n        // Seek to correct position in media\n        const mediaStartTime = item.mediaStartTime || 0;\n        const offsetInItem = position - item.startTime;\n        element.currentTime = (mediaStartTime + offsetInItem) / 1000;\n      }\n    }\n\n    // Synchronize to add any new media that should be active\n    this.synchronizeMedia(tracks, position);\n\n    // Render current frame\n    this.renderToCanvas();\n  }\n\n  /**\n   * Force render the current state to canvas (useful when paused)\n   */\n  renderCurrentFrame(): void {\n    this.renderToCanvas();\n  }\n}\n",
    "structuredPatch": [
      {
        "oldStart": 65,
        "oldLines": 6,
        "newStart": 65,
        "newLines": 20,
        "lines": [
          "     if (this._isPlaying()) return;",
          " ",
          "     this._isPlaying.set(true);",
          "+",
          "+    // Start playing any already-loaded media elements",
          "+    for (const activeMedia of this.activeMediaMap.values()) {",
          "+      if (activeMedia.element instanceof HTMLVideoElement) {",
          "+        activeMedia.element.play().catch(() => {",
          "+          // Autoplay may be blocked, try muted",
          "+          activeMedia.element.muted = true;",
          "+          (activeMedia.element as HTMLVideoElement).play().catch(() => {});",
          "+        });",
          "+      } else if (activeMedia.element instanceof HTMLAudioElement) {",
          "+        activeMedia.element.play().catch(() => {});",
          "+      }",
          "+    }",
          "+",
          "     this.lastFrameTime = performance.now();",
          "     this.startPlaybackLoop(tracks, totalDuration);",
          "   }"
        ]
      }
    ],
    "userModified": false,
    "replaceAll": false
  }
}
[2025-12-05T11:46:39.360Z] [INFO] {
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        "text": "Perfect! Now let me update my todo list and test the fix:"
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[2025-12-05T11:46:43.682Z] [INFO] {
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              "content": "Search for media playback code and identify where auto-play occurs",
              "activeForm": "Searching for media playback code and identifying where auto-play occurs",
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              "content": "Check PlaybackService for play/pause controls",
              "activeForm": "Checking PlaybackService for play/pause controls",
              "status": "completed"
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              "activeForm": "Finding where media elements are added to timeline",
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[2025-12-05T11:46:44.075Z] [INFO] {
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        "type": "tool_result",
        "content": "Todos have been modified successfully. Ensure that you continue to use the todo list to track your progress. Please proceed with the current tasks if applicable"
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        "activeForm": "Understanding the issue: Audio and video should only play when Play button is pressed"
      },
      {
        "content": "Search for media playback code and identify where auto-play occurs",
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        "activeForm": "Searching for media playback code and identifying where auto-play occurs"
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      {
        "content": "Check PlaybackService for play/pause controls",
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        "activeForm": "Checking PlaybackService for play/pause controls"
      },
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        "content": "Find where media elements are added to timeline",
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        "content": "Implement fix to prevent auto-play on media addition",
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[2025-12-05T11:46:48.236Z] [INFO] {
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        "text": "Now let me check if there are any tests I should run:"
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[2025-12-05T11:46:49.533Z] [INFO] {
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          "description": "Run tests in headless mode",
          "timeout": 300000
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[2025-12-05T11:46:55.151Z] [INFO] {
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      {
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        "type": "tool_result",
        "content": "> [email protected] test\n> ng test --watch=false --browsers=ChromeHeadless\n\nsh: 1: ng: not found",
        "is_error": false
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        "text": "Let me install dependencies first:"
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[2025-12-05T11:47:03.838Z] [INFO] {
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[2025-12-05T11:49:49.310Z] [INFO]     type: 'video',\n            startTime: 0,\n            duration: 5000,\n            trackId: '1',\n            name: 'Test Video',\n            url: 'test-video.mp4',\n            isPlaceholder: false\n          },\n          {\n            id: 'audio1',\n            type: 'audio',\n            startTime: 5000,\n            duration: 3000,\n            trackId: '1',\n            name: 'Test Audio',\n            url: 'test-audio.mp3',\n            isPlaceholder: false\n          }\n        ]\n      }\n    ];\n  });\n\n  it('should NOT auto-play video when seeking (simulating media addition)', () => {\n    // When media is added to timeline, seek is called to update preview\n    // This should load the media but NOT play it\n    playbackService.seek(mockTracks, 1000); // Seek to 1 second (within video range)\n\n    // Verify video element was created but play() was NOT called\n    expect(document.createElement).toHaveBeenCalledWith('video');\n    expect(mockVideoElement.play).not.toHaveBeenCalled();\n  });\n\n  it('should NOT auto-play audio when seeking', () => {\n    playbackService.seek(mockTracks, 6000); // Seek to 6 seconds (within audio range)\n\n    expect(document.createElement).toHaveBeenCalledWith('audio');\n    expect(mockAudioElement.play).not.toHaveBeenCalled();\n  });\n\n  it('should play video when Play button is pressed', () => {\n    // First, load the media by seeking (without playing)\n    playbackService.seek(mockTracks, 1000);\n    expect(mockVideoElement.play).not.toHaveBeenCalled();\n\n    // Now press Play button\n    playbackService.play(mockTracks, 120000);\n\n    // Verify play() was called\n    expect(mockVideoElement.play).toHaveBeenCalled();\n  });\n\n  it('should play audio when Play button is pressed', () => {\n    playbackService.seek(mockTracks, 6000);\n    expect(mockAudioElement.play).not.toHaveBeenCalled();\n\n    playbackService.play(mockTracks, 120000);\n    expect(mockAudioElement.play).toHaveBeenCalled();\n  });\n\n  it('should pause media when Pause button is pressed', () => {\n    // Start playback\n    playbackService.play(mockTracks, 120000);\n\n    // Pause\n    playbackService.pause();\n\n    // Verify pause was called\n    expect(mockVideoElement.pause).toHaveBeenCalled();\n  });\n\n  it('should auto-play newly loaded media during playback', () => {\n    // Start playback at position before video\n    playbackService.play(mockTracks, 120000);\n\n    // Now seek into video range while playing (simulates playhead reaching video)\n    // This should load AND play the video since playback is active\n    playbackService.seek(mockTracks, 1000);\n\n    // In this case, play() should be called because isPlaying is true\n    expect(mockVideoElement.play).toHaveBeenCalled();\n  });\n});\n\nconsole.log('Issue 114 verification test created.');\nconsole.log('This test ensures media does NOT auto-play when added to timeline.');\nconsole.log('Media should only play when the Play button is pressed.');\n"}}],"stop_reason":"tool_use","stop_sequence":null,"usage":{"input_tokens":0,"cache_creation_input_tokens":243,"cache_read_input_tokens":59816,"cache_creation":{"ephemeral_5m_input_tokens":243,"ephemeral_1h_input_tokens":0},"output_tokens":1471,"service_tier":"standard"},"context_management":{"applied_edits":[]}},"parent_tool_use_id":null,"session_id":"084914e4-263f-4bd0-8b1a-fcc69335a956","uuid":"28499ce4-0a0c-4b17-b5d6-6a20cd29ce6b"}
[2025-12-05T11:49:49.802Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01VzEc9M8QsuMrqxP9mHHGTS","type":"tool_result","content":"File created successfully at: /tmp/gh-issue-solver-1764934996954/experiments/issue-114-verify-no-autoplay.ts"}]},"parent_tool_use_id":null,"session_id":"084914e4-263f-4bd0-8b1a-fcc69335a956","uuid":"269ceb94-ed9b-4965-b46f-d0ca62eef451","tool_use_result":{"type":"create","filePath":"/tmp/gh-issue-solver-1764934996954/experiments/issue-114-verify-no-autoplay.ts","content":"/**\n * Experiment to verify that issue #114 is fixed:\n * Audio and video should NOT auto-play when added to timeline.\n * They should only play when the Play button is pressed.\n *\n * This test verifies:\n * 1. When media is added (via seek), it should NOT call .play()\n * 2. When Play button is pressed, it SHOULD call .play() on loaded media\n * 3. When paused, media should call .pause()\n */\n\ndescribe('Issue 114: Media should not auto-play', () => {\n  let playbackService: any;\n  let mockTracks: any[];\n  let mockVideoElement: any;\n  let mockAudioElement: any;\n\n  beforeEach(() => {\n    // Mock media elements\n    mockVideoElement = {\n      play: jasmine.createSpy('play').and.returnValue(Promise.resolve()),\n      pause: jasmine.createSpy('pause'),\n      src: '',\n      currentTime: 0,\n      muted: false,\n      readyState: 4,\n      videoWidth: 1920,\n      videoHeight: 1080,\n      crossOrigin: ''\n    };\n\n    mockAudioElement = {\n      play: jasmine.createSpy('play').and.returnValue(Promise.resolve()),\n      pause: jasmine.createSpy('pause'),\n      src: '',\n      currentTime: 0\n    };\n\n    // Mock document.createElement\n    spyOn(document, 'createElement').and.callFake((tagName: string) => {\n      if (tagName === 'video') {\n        return { ...mockVideoElement };\n      } else if (tagName === 'audio') {\n        return { ...mockAudioElement };\n      }\n      return document.createElement(tagName);\n    });\n\n    // Setup mock tracks with m
[2025-12-05T11:49:49.845Z] [INFO] edia items\n    mockTracks = [\n      {\n        id: '1',\n        name: 'Track 1',\n        order: 0,\n        items: [\n          {\n            id: 'video1',\n            type: 'video',\n            startTime: 0,\n            duration: 5000,\n            trackId: '1',\n            name: 'Test Video',\n            url: 'test-video.mp4',\n            isPlaceholder: false\n          },\n          {\n            id: 'audio1',\n            type: 'audio',\n            startTime: 5000,\n            duration: 3000,\n            trackId: '1',\n            name: 'Test Audio',\n            url: 'test-audio.mp3',\n            isPlaceholder: false\n          }\n        ]\n      }\n    ];\n  });\n\n  it('should NOT auto-play video when seeking (simulating media addition)', () => {\n    // When media is added to timeline, seek is called to update preview\n    // This should load the media but NOT play it\n    playbackService.seek(mockTracks, 1000); // Seek to 1 second (within video range)\n\n    // Verify video element was created but play() was NOT called\n    expect(document.createElement).toHaveBeenCalledWith('video');\n    expect(mockVideoElement.play).not.toHaveBeenCalled();\n  });\n\n  it('should NOT auto-play audio when seeking', () => {\n    playbackService.seek(mockTracks, 6000); // Seek to 6 seconds (within audio range)\n\n    expect(document.createElement).toHaveBeenCalledWith('audio');\n    expect(mockAudioElement.play).not.toHaveBeenCalled();\n  });\n\n  it('should play video when Play button is pressed', () => {\n    // First, load the media by seeking (without playing)\n    playbackService.seek(mockTracks, 1000);\n    expect(mockVideoElement.play).not.toHaveBeenCalled();\n\n    // Now press Play button\n    playbackService.play(mockTracks, 120000);\n\n    // Verify play() was called\n    expect(mockVideoElement.play).toHaveBeenCalled();\n  });\n\n  it('should play audio when Play button is pressed', () => {\n    playbackService.seek(mockTracks, 6000);\n    expect(mockAudioElement.play).not.toHaveBeenCalled();\n\n    playbackService.play(mockTracks, 120000);\n    expect(mockAudioElement.play).toHaveBeenCalled();\n  });\n\n  it('should pause media when Pause button is pressed', () => {\n    // Start playback\n    playbackService.play(mockTracks, 120000);\n\n    // Pause\n    playbackService.pause();\n\n    // Verify pause was called\n    expect(mockVideoElement.pause).toHaveBeenCalled();\n  });\n\n  it('should auto-play newly loaded media during playback', () => {\n    // Start playback at position before video\n    playbackService.play(mockTracks, 120000);\n\n    // Now seek into video range while playing (simulates playhead reaching video)\n    // This should load AND play the video since playback is active\n    playbackService.seek(mockTracks, 1000);\n\n    // In this case, play() should be called because isPlaying is true\n    expect(mockVideoElement.play).toHaveBeenCalled();\n  });\n});\n\nconsole.log('Issue 114 verification test created.');\nconsole.log('This test ensures media does NOT auto-play when added to timeline.');\nconsole.log('Media should only play when the Play button is pressed.');\n","structuredPatch":[],"originalFile":null}}
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          "old_string": "    // Start playing any already-loaded media elements\n    for (const activeMedia of this.activeMediaMap.values()) {\n      if (activeMedia.element instanceof HTMLVideoElement) {\n        activeMedia.element.play().catch(() => {\n          // Autoplay may be blocked, try muted\n          activeMedia.element.muted = true;\n          (activeMedia.element as HTMLVideoElement).play().catch(() => {});\n        });\n      } else if (activeMedia.element instanceof HTMLAudioElement) {\n        activeMedia.element.play().catch(() => {});\n      }\n    }",
          "new_string": "    // Start playing any already-loaded media elements\n    for (const activeMedia of this.activeMediaMap.values()) {\n      if (activeMedia.element instanceof HTMLVideoElement) {\n        const videoElement = activeMedia.element as HTMLVideoElement;\n        videoElement.play().catch(() => {\n          // Autoplay may be blocked, try muted\n          videoElement.muted = true;\n          videoElement.play().catch(() => {});\n        });\n      } else if (activeMedia.element instanceof HTMLAudioElement) {\n        activeMedia.element.play().catch(() => {});\n      }\n    }"
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        "content": "The file /tmp/gh-issue-solver-1764934996954/video-timeline/src/app/services/playback.service.ts has been updated. Here's the result of running `cat -n` on a snippet of the edited file:\n    65→    if (this._isPlaying()) return;\n    66→\n    67→    this._isPlaying.set(true);\n    68→\n    69→    // Start playing any already-loaded media elements\n    70→    for (const activeMedia of this.activeMediaMap.values()) {\n    71→      if (activeMedia.element instanceof HTMLVideoElement) {\n    72→        const videoElement = activeMedia.element as HTMLVideoElement;\n    73→        videoElement.play().catch(() => {\n    74→          // Autoplay may be blocked, try muted\n    75→          videoElement.muted = true;\n    76→          videoElement.play().catch(() => {});\n    77→        });\n    78→      } else if (activeMedia.element instanceof HTMLAudioElement) {\n    79→        activeMedia.element.play().catch(() => {});\n    80→      }\n    81→    }\n    82→\n    83→    this.lastFrameTime = performance.now();\n    84→    this.startPlaybackLoop(tracks, totalDuration);\n    85→  }"
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    "oldString": "    // Start playing any already-loaded media elements\n    for (const activeMedia of this.activeMediaMap.values()) {\n      if (activeMedia.element instanceof HTMLVideoElement) {\n        activeMedia.element.play().catch(() => {\n          // Autoplay may be blocked, try muted\n          activeMedia.element.muted = true;\n          (activeMedia.element as HTMLVideoElement).play().catch(() => {});\n        });\n      } else if (activeMedia.element instanceof HTMLAudioElement) {\n        activeMedia.element.play().catch(() => {});\n      }\n    }",
    "newString": "    // Start playing any already-loaded media elements\n    for (const activeMedia of this.activeMediaMap.values()) {\n      if (activeMedia.element instanceof HTMLVideoElement) {\n        const videoElement = activeMedia.element as HTMLVideoElement;\n        videoElement.play().catch(() => {\n          // Autoplay may be blocked, try muted\n          videoElement.muted = true;\n          videoElement.play().catch(() => {});\n        });\n      } else if (activeMedia.element instanceof HTMLAudioElement) {\n        activeMedia.element.play().catch(() => {});\n      }\n    }",
    "originalFile": "import { Injectable, signal, computed } from '@angular/core';\nimport { MediaItem, MediaType, Track } from '../models/timeline.models';\n\n/**\n * Represents an active media element being played\n */\nexport interface ActiveMedia {\n  item: MediaItem;\n  element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n  trackOrder: number; // For layering: lower order = rendered first (bottom layer)\n}\n\n/**\n * Service responsible for managing real media playback.\n * Handles synchronization of media elements with timeline playhead position.\n */\n@Injectable({\n  providedIn: 'root'\n})\nexport class PlaybackService {\n  // Playback state\n  private _isPlaying = signal<boolean>(false);\n  private _playheadPosition = signal<number>(0);\n  private animationFrameId: number | null = null;\n  private lastFrameTime: number = 0;\n\n  // Active media elements\n  private activeMediaMap = new Map<string, ActiveMedia>();\n\n  // Canvas reference for rendering\n  private canvas: HTMLCanvasElement | null = null;\n  private canvasContext: Canva**************ext2D | null = null;\n\n  // Exposed signals\n  readonly isPlaying = this._isPlaying.asReadonly();\n  readonly playheadPosition = this._playheadPosition.asReadonly();\n\n  // Computed: current active media items for rendering\n  readonly activeMediaItems = computed(() => {\n    return Array.from(this.activeMediaMap.values())\n      .sort((a, b) => a.trackOrder - b.trackOrder);\n  });\n\n  constructor() {}\n\n  /**\n   * Set the canvas element for rendering video/image preview\n   */\n  setCanvas(canvas: HTMLCanvasElement): void {\n    this.canvas = canvas;\n    this.canvasContext = canvas.getContext('2d');\n  }\n\n  /**\n   * Update playhead position (called from timeline component)\n   */\n  setPlayheadPosition(position: number): void {\n    this._playheadPosition.set(position);\n  }\n\n  /**\n   * Start playback\n   */\n  play(tracks: Track[], totalDuration: number): void {\n    if (this._isPlaying()) return;\n\n    this._isPlaying.set(true);\n\n    // Start playing any already-loaded media elements\n    for (const activeMedia of this.activeMediaMap.values()) {\n      if (activeMedia.element instanceof HTMLVideoElement) {\n        activeMedia.element.play().catch(() => {\n          // Autoplay may be blocked, try muted\n          activeMedia.element.muted = true;\n          (activeMedia.element as HTMLVideoElement).play().catch(() => {});\n        });\n      } else if (activeMedia.element instanceof HTMLAudioElement) {\n        activeMedia.element.play().catch(() => {});\n      }\n    }\n\n    this.lastFrameTime = performance.now();\n    this.startPlaybackLoop(tracks, totalDuration);\n  }\n\n  /**\n   * Pause playback\n   */\n  pause(): void {\n    this._isPlaying.set(false);\n    if (this.animationFrameId !== null) {\n      cancelAnimationFrame(this.animationFrameId);\n      this.animationFrameId = null;\n    }\n\n    // Pause all active media\n    for (const activeMedia of this.activeMediaMap.values()) {\n      if (activeMedia.element instanceof HTMLVideoElement ||\n          activeMedia.element instanceof HTMLAudioElement) {\n        activeMedia.element.pause();\n      }\n    }\n  }\n\n  /**\n   * Stop playback and reset position\n   */\n  stop(): void {\n    this.pause();\n    this._playheadPosition.set(0);\n    this.cleanupAllMedia();\n  }\n\n  /**\n   * Main playback loop - advances playhead and synchronizes media\n   */\n  private startPlaybackLoop(tracks: Track[], totalDuration: number): void {\n    const animate = (currentTime: number) => {\n      if (!this._isPlaying()) return;\n\n      // Calculate delta time\n      const deltaTime = currentTime - this.lastFrameTime;\n      this.lastFrameTime = currentTime;\n\n      // Update playhead position\n      let newPosition = this._playheadPosition() + deltaTime;\n\n      // Check if we've reached the end\n      if (newPosition >= totalDuration) {\n        newPosition = totalDuration;\n        this.pause();\n      }\n\n      this._playheadPosition.set(newPosition);\n\n      // Synchronize media with new position\n      this.synchronizeMedia(tracks, newPosition);\n\n      // Render to canvas\n      this.renderToCanvas();\n\n      // Continue animation loop\n      if (this._isPlaying()) {\n        this.animationFrameId = requestAnimationFrame(animate);\n      }\n    };\n\n    this.animationFrameId = requestAnimationFrame(animate);\n  }\n\n  /**\n   * Synchronize media elements with the current playhead position.\n   * Start/stop media as playhead enters/exits their time range.\n   */\n  private synchronizeMedia(tracks: Track[], playheadTime: number): void {\n    // Collect all items that should be active at current time\n    const shouldBeActive = new Map<string, { item: MediaItem; trackOrder: number }>();\n\n    for (const track of tracks) {\n      for (const item of track.items) {\n        const itemEnd = item.startTime + item.duration;\n\n        // Check if playhead is within item's time range\n        if (playheadTime >= item.startTime && playheadTime < itemEnd) {\n          // Skip placeholders without URL\n          if (item.isPlaceholder || !item.url) continue;\n\n          shouldBeActive.set(item.id, { item, trackOrder: track.order });\n        }\n      }\n    }\n\n    // Stop media that should no longer be active\n    for (const [id, activeMedia] of this.activeMediaMap.entries()) {\n      if (!shouldBeActive.has(id)) {\n        this.stopMedia(activeMedia);\n        this.activeMediaMap.delete(id);\n      }\n    }\n\n    // Start or update media that should be active\n    for (const [id, { item, trackOrder }] of shouldBeActive.entries()) {\n      if (!this.activeMediaMap.has(id)) {\n        // Start new media\n        this.startMedia(item, trackOrder, playheadTime);\n      } else {\n        // Update existing media position if needed\n        this.updateMediaPosition(this.activeMediaMap.get(id)!, playheadTime);\n      }\n    }\n  }\n\n  /**\n   * Start playing a media item\n   */\n  private startMedia(item: MediaItem, trackOrder: number, playheadTime: number): void {\n    if (!item.url) return;\n\n    const mediaStartTime = item.mediaStartTime || 0;\n    const offsetInItem = playheadTime - item.startTime;\n    const mediaTime = (mediaStartTime + offsetInItem) / 1000; // Convert to seconds\n\n    let element: HTMLVideoElement | HTMLAudioElement | HTMLImageElement;\n\n    switch (item.type) {\n      case MediaType.VIDEO:\n        element = document.createElement('video');\n        (element as HTMLVideoElement).src = item.url;\n        (element as HTMLVideoElement).currentTime = mediaTime;\n        (element as HTMLVideoElement).muted = false;\n        // Only play if playback is active\n        if (this._isPlaying()) {\n          (element as HTMLVideoElement).play().catch(() => {\n            // Autoplay may be blocked, try muted\n            (element as HTMLVideoElement).muted = true;\n            (element as HTMLVideoElement).play().catch(() => {});\n          });\n        }\n        break;\n\n      case MediaType.AUDIO:\n        element = document.createElement('audio');\n        (element as HTMLAudioElement).src = item.url;\n        (element as HTMLAudioElement).currentTime = mediaTime;\n        // Only play if playback is active\n        if (this._isPlaying()) {\n          (element as HTMLAudioElement).play().catch(() => {});\n        }\n        break;\n\n      case MediaType.IMAGE:\n        element = document.createElement('img');\n        (element as HTMLImageElement).src = item.url;\n        (element as HTMLImageElement).crossOrigin = 'anonymous';\n        break;\n\n      default:\n        return;\n    }\n\n    // For video, also set crossOrigin for canvas rendering\n    if (element instanceof HTMLVideoElement) {\n      element.crossOrigin = 'anonymous';\n    }\n\n    this.activeMediaMap.set(item.id, { item, element, trackOrder });\n  }\n\n  /**\n   * Stop and cleanup a media element\n   */\n  private stopMedia(activeMedia: ActiveMedia): void {\n    const { element } = activeMedia;\n\n    if (element instanceof HTMLVideoElement || element instanceof HTMLAudioElement) {\n      element.pause();\n      element.src = '';\n      element.load();\n    }\n  }\n\n  /**\n   * Update media playback position if it's out of sync\n   */\n  private updateMediaPosition(activeMedia: ActiveMedia, playheadTime: number): void {\n    const { item, element } = activeMedia;\n\n    if (element instanceof HTMLVideoElement || element instanceof HTMLAudioElement) {\n      const mediaStartTime = item.mediaStartTime || 0;\n      const offsetInItem = playheadTime - 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fit to width\n      width = canvasWidth;\n      height = canvasWidth / sourceAspect;\n    } else {\n      // Source is taller - fit to height\n      height = canvasHeight;\n      width = canvasHeight * sourceAspect;\n    }\n\n    // Center the media\n    const x = (canvasWidth - width) / 2;\n    const y = (canvasHeight - height) / 2;\n\n    return { width, height, x, y };\n  }\n\n  /**\n   * Cleanup all active media\n   */\n  private cleanupAllMedia(): void {\n    for (const activeMedia of this.activeMediaMap.values()) {\n      this.stopMedia(activeMedia);\n    }\n    this.activeMediaMap.clear();\n  }\n\n  /**\n   * Seek to a specific position and update media accordingly\n   */\n  seek(tracks: Track[], position: number): void {\n    this._playheadPosition.set(position);\n\n    // Update all active media positions\n    for (const activeMedia of this.activeMediaMap.values()) {\n      const { item, element } = activeMedia;\n      const itemEnd = item.startTime + item.duration;\n\n      // Check if media should still be active at new position\n      if (position < item.startTime || position >= itemEnd) {\n        // Media should no longer be active\n        this.stopMedia(activeMedia);\n        this.activeMediaMap.delete(item.id);\n      } else if (element instanceof HTMLVideoElement || element instanceof HTMLAudioElement) {\n        // Seek to correct position in media\n        const mediaStartTime = item.mediaStartTime || 0;\n        const offsetInItem = position - 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          "+        videoElement.play().catch(() => {",
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          "-          (activeMedia.element as HTMLVideoElement).play().catch(() => {});",
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          "+          videoElement.play().catch(() => {});",
          "         });",
          "       } else if (activeMedia.element instanceof HTMLAudioElement) {",
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[2025-12-05T11:51:17.354Z] [INFO] {
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[2025-12-05T11:53:01.545Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_014yKqHKGYPDVoudXiKew4Yu","type":"tool_result","content":"<status>completed</status>\n\n<exit_code>0</exit_code>\n\n<stdout>\n> [email protected] test\n> ng test --watch=false --browsers=ChromeHeadless\n\n❯ Building...\n✔ Building...\nInitial chunk files                                               | Names                                                          |  Raw size\nchunk-OZPV6NG3.js                                                 | -                                                              |   2.42 MB | \npolyfills.js                                                      | polyfills                                                      | 944.09 kB | \nstyles.css                                                        | styles                                                         | 124.56 kB | \nchunk-JESANSTX.js                                                 | -                                                              |  84.22 kB | \ntest_main.js                                                      | test_main                                                      |  60.00 kB | \nspec-app-components-timeline-timeline.component.spec.js           | spec-app-components-timeline-timeline.component.spec           |  47.24 kB | \nchunk-EDHG5LMI.js                                                 | -                                                              |   8.72 kB | \nspec-app-components-media-library-media-library.component.spec.js | spec-app-components-media-library-media-library.component.spec |   3.52 kB | \nspec-app-app.spec.js                                              | spec-app-app.spec                                              |   2.20 kB | \njasmine-cleanup-0.js                                              | jasmine-cleanup-0                                              | 519 bytes | \n\n                                                                  | Initial total                                                  |   3.69 MB\n\nApplication bundle generation complete. [35.016 seconds] - 2025-12-05T11:52:05.097Z\n\n\u001b[32m05 12 2025 11:52:10.539:INFO [karma-server]: \u001b[39mKarma v6.4.4 server started at http://localhost:9876/\n\u001b[32m05 12 2025 11:52:10.555:INFO [launcher]: \u001b[39mLaunching browsers ChromeHeadless with concurrency unlimited\n\u001b[32m05 12 2025 11:52:10.598:INFO [launcher]: \u001b[39mStarting browser ChromeHeadless\n\u001b[91m05 12 2025 11:52:11.920:ERROR [launcher]: \u001b[39mCannot start ChromeHeadless\n\t[2123895:2123895:1205/115211.494701:FATAL:content/browser/zygote_host/zygote_host_impl_linux.cc:128] No usable sandbox! If you are running on Ubuntu 23.10+ or another Linux distro that has disabled unprivileged user namespaces with AppArmor, see https://chromium.googlesource.com/chromium/src/+/main/docs/security/apparmor-userns-restrictions.md. Otherwise see https://chromium.googlesource.com/chromium/src/+/main/docs/linux/suid_sandbox_development.md for more information on developing with the (older) SUID sandbox. If you want to live dangerously and need an immediate workaround, you can try using --no-sandbox.\n[1205/115211.556107:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq: No such file or directory (2)\n[1205/115211.556239:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: No such file or directory (2)\nReceived signal 6\n#0 0x5d6d582feaaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5c06aa9)\n#1 0x5d6d5c97a154 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa282153)\n#2 0x7d1db9445330 (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4532f)\n#3 0x7d1db944527e (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4527d)\n#4 0x7d1db94288ff (/usr/lib/x86_64-linux-gnu/libc.so.6+0x288fe)\n#5 0x5d6d5c970fd5 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa278fd4)\n#6 0x5d6d5c932b1d (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23ab1c)\n#7 0x5d6d5c932ab7 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23aab6)\n#8 0x5d6d5693cfd8 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x4244fd7)\n#9 0x5d6d578acf99 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x51b4f98)\n#10 0x5d6d582cbcc6 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5bd3cc5)\n#11 0x5d6d5bd65bef (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x966dbee)\n#12 0x5d6d57efca21 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804a20)\n#13 0x5d6d57efc043 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804042)\n#14 0x7d1db942a1ca (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9)\n#15 0x7d1db942a28b (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a28a)\n#16 0x5d6d58ba6caa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x64aeca9)\n  r8: 000035c0000a84e9  r9: 0000000000000001 r10: 0000000000000008 r11: 0000000000000246\n r12: 0000000000000006 r13: 000000000000026a r14: 0000000000000016 r15: 00007ffd2e1e3a58\n  di: 0000000000206877  si: 0000000000206877  bp: 00007ffd2e1e33c0  bx: 0000000000206877\n  dx: 0000000000000006  ax: 0000000000000000  cx: 00007d1db949eb2c  sp: 00007ffd2e1e3380\n  ip: 00007d1db949eb2c efl: 0000000000000246 cgf: 002b000000000033 erf: 0000000000000000\n trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000\n[end of stack trace]\n\n\u001b[91m05 12 2025 11:52:11.930:ERROR [launcher]: \u001b[39mChromeHeadless stdout: \n\u001b[91m05 12 2025 11:52:11.930:ERROR [launcher]: \u001b[39mChromeHeadless stderr: [2123895:2123895:1205/115211.494701:FATAL:content/browser/zygote_host/zygote_host_impl_linux.cc:128] No usable sandbox! If you are running on Ubuntu 23.10+ or another Linux distro that has disabled unprivileged user namespaces with AppArmor, see https://chromium.googlesource.com/chromium/src/+/main/docs/security/apparmor-userns-restrictions.md. Otherwise see https://chromium.googlesource.com/chromium/src/+/main/docs/linux/suid_sandbox_development.md for more information on developing with the (older) SUID sandbox. If you want to live dangerously and need an immediate workaround, you can try using --no-sandbox.\n[1205/115211.556107:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq: No such file or directory (2)\n[1205/115211.556239:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: No such file or directory (2)\nReceived signal 6\n#0 0x5d6d582feaaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5c06aa9)\n#1 0x5d6d5c97a154 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa282153)\n#2 0x7d1db9445330 (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4532f)\n#3 0x7d1db944527e (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4527d)\n#4 0x7d1db94288ff (/usr/lib/x86_64-linux-gnu/libc.so.6+0x288fe)\n#5 0x5d6d5c970fd5 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa278fd4)\n#6 0x5d6d5c932b1d (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23ab1c)\n#7 0x5d6d5c932ab7 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23aab6)\n#8 0x5d6d5693cfd8 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x4244fd7)\n#9 0x5d6d578acf99 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x51b4f98)\n#10 0x5d6d582cbcc6 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5bd3cc5)\n#11 0x5d6d5bd65bef (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x966dbee)\n#12 0x5d6d57efca21 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804a20)\n#13 0x5d6d57efc043 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804042)\n#14 0x7d1db942a1ca (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9)\n#15 0x7d1db942a28b (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a28a)\n#16 0x5d6d58ba6caa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x64aeca9)\n  r8: 000035c0000a84e9  r9: 0000000000000001 r10: 0000000000000008 r11: 0000000000000246\n r12: 0000000000000006 r13: 000000000000026a r14: 0000000000000016 r15: 00007ffd2e1e3a58\n  di: 0000000000206877  si: 0000000000206877  bp: 00007ffd2e1e33c0  bx: 0000000000206877\n  dx: 0000000000000006  ax: 0000000000000000  cx: 00007d1db949eb2c  sp: 00007ffd2e1e3380\n  ip: 00007d1db949eb2c efl: 0000000000000246 cgf: 002b000000000033 erf: 0000000000000000\n trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000\n[end of stack trace]\n\n\u001b[32m05 12 2025 11:52:11.998:INFO [launcher]: \u001b[39mTrying to start ChromeHeadless again (1/2).\n\u001b[91m05 12 2025 11:52:13.231:ERROR [launcher]: \u001b[39mCannot start ChromeHeadless\n\t[2123904:2123904:1205/115212.899739:FATAL:content/browser/zygote_host/zygote_host_impl_linux.cc:128] No usable sandbox! If you are running on Ubuntu 23.10+ or another Linux distro that has disabled unprivileged user namespaces with AppArmor, see https://chromium.googlesource.com/chromium/src/+/main/docs/security/apparmor-userns-restrictions.md. Otherwise see https://chromium.googlesource.com/chromium/src/+/main/docs/linux/suid_sandbox_development.md for more information on developing with the (older) SUID sandbox. If you want to live dangerously and need an immediate workaround, you can try using --no-sandbox.\n[1205/115212.976065:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq: No such file or directory (2)\n[1205/115212.976171:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: No such file or directory (2)\nReceived signal 6\n#0 0x60474866faaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5c06aa9)\n#1 0x60474cceb154 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa282153)\n#2 0x735084045330 (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4532f)\n#3 0x73508404527e (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4527d)\n#4 0x7350840288ff (/usr/lib/x86_64-linux-gnu/libc.so.6+0x288fe)\n#5 0x60474cce1fd5 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa278fd4)\n#6 0x60474cca3b1d (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23ab1c)\n#7 0x60474cca3ab7 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23aab6)\n#8 0x604746cadfd8 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x4244fd7)\n#9 0x604747c1df99 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x51b4f98)\n#10 0x60474863ccc6 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5bd3cc5)\n#11 0x60474c0d6bef (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x966dbee)\n#12 0x60474826da21 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804a20)\n#13 0x60474826d043 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804042)\n#14 0x73508402a1ca (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9)\n#15 0x73508402a28b (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a28a)\n#16 0x604748f17caa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x64aeca9)\n  r8: 000034e0000a84e9  r9: 0000000000000001 r10: 0000000000000008 r11: 0000000000000246\n r12: 0000000000000006 r13: 000000000000026a r14: 0000000000000016 r15: 00007fffb0e05f48\n  di: 0000000000206880  si: 0000000000206880  bp: 00007fffb0e058b0  bx: 0000000000206880\n  dx: 0000000000000006  ax: 0000000000000000  cx: 000073508409eb2c  sp: 00007fffb0e05870\n  ip: 000073508409eb2c efl: 0000000000000246 cgf: 002b000000000033 erf: 0000000000000000\n trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000\n[end of stack trace]\n\n\u001b[91m05 12 2025 11:52:13.232:ERROR [launcher]: \u001b[39mChromeHeadless stdout: \n\u001b[91m05 12 2025 11:52:13.233:ERROR [launcher]: \u001b[39mChromeHeadless stderr: [2123904:2123904:1205/115212.899739:FATAL:content/browser/zygote_host/zygote_host_impl_linux.cc:128] No usable sandbox! If you are running on Ubuntu 23.10+ or another Linux distro that has disabled unprivileged user namespaces with AppArmor, see https://chromium.googlesource.com/chromium/src/+/main/docs/security/apparmor-userns-restrictions.md. Otherwise see https://chromium.googlesource.com/chromium/src/+/main/docs/linux/suid_sandbox_development.md for more information on developing with the (older) SUID sandbox. If you want to live dangerously and need an immediate workaround, you can try using --no-sandbox.\n[1205/115212.976065:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq: No such file or directory (2)\n[1205/115212.976171:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: No such file or directory (2)\nReceived signal 6\n#0 0x60474866faaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5c06aa9)\n#1 0x60474cceb154 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa282153)\n#2 0x735084045330 (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4532f)\n#3 0x73508404527e (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4527d)\n#4 0x7350840288ff (/usr/lib/x86_64-linux-gnu/libc.so.6+0x288fe)\n#5 0x60474cce1fd5 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa278fd4)\n#6 0x60474cca3b1d (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23ab1c)\n#7 0x60474cca3ab7 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23aab6)\n#8 0x604746cadfd8 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x4244fd7)\n#9 0x604747c1df99 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x51b4f98)\n#10 0x60474863ccc6 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5bd3cc5)\n#11 0x60474c0d6bef (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x966dbee)\n#12 0x60474826da21 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804a20)\n#13 0x60474826d043 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804042)\n#14 0x73508402a1ca (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9)\n#15 0x73508402a28b (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a28a)\n#16 0x604748f17caa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x64aeca9)\n  r8: 000034e0000a84e9  r9: 0000000000000001 r10: 0000000000000008 r11: 0000000000000246\n r12: 0000000000000006 r13: 000000000000026a r14: 0000000000000016 r15: 00007fffb0e05f48\n  di: 0000000000206880  si: 0000000000206880  bp: 00007fffb0e058b0  bx: 0000000000206880\n  dx: 0000000000000006  ax: 0000000000000000  cx: 000073508409eb2c  sp: 00007fffb0e05870\n  ip: 000073508409eb2c efl: 0000000000000246 cgf: 002b000000000033 erf: 0000000000000000\n trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000\n[end of stack trace]\n\n\u001b[32m05 12 2025 11:52:13.234:INFO [launcher]: \u001b[39mTrying to start ChromeHeadless again (2/2).\n\u001b[91m05 12 2025 11:52:13.949:ERROR [launcher]: \u001b[39mCannot start ChromeHeadless\n\t[2123916:2123916:1205/115213.545604:FATAL:content/browser/zygote_host/zygote_host_impl_linux.cc:128] No usable sandbox! If you are running on Ubuntu 23.10+ or another Linux distro that has disabled unprivileged user namespaces with AppArmor, see https://chromium.googlesource.com/chromium/src/+/main/docs/security/apparmor-userns-restrictions.md. Otherwise see https://chromium.googlesource.com/chromium/src/+/main/docs/linux/suid_sandbox_development.md for more information on developing with the (older) SUID sandbox. If you want to live dangerously and need an immediate workaround, you can try using --no-sandbox.\n[1205/115213.646104:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq: No such file or directory (2)\n[1205/115213.646220:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: No such file or directory (2)\nReceived signal 6\n#0 0x5bd2756e2aaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5c06aa9)\n#1 0x5bd279d5e154 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa282153)\n#2 0x77c528a45330 (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4532f)\n#3 0x77c528a4527e (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4527d)\n#4 0x77c528a288ff (/usr/lib/x86_64-linux-gnu/libc.so.6+0x288fe)\n#5 0x5bd279d54fd5 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa278fd4)\n#6 0x5bd279d16b1d (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23ab1c)\n#7 0x5bd279d16ab7 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23aab6)\n#8 0x5bd273d20fd8 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x4244fd7)\n#9 0x5bd274c90f99 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x51b4f98)\n#10 0x5bd2756afcc6 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5bd3cc5)\n#11 0x5bd279149bef (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x966dbee)\n#12 0x5bd2752e0a21 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804a20)\n#13 0x5bd2752e0043 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804042)\n#14 0x77c528a2a1ca (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9)\n#15 0x77c528a2a28b (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a28a)\n#16 0x5bd275f8acaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x64aeca9)\n  r8: 00001498000a84e9  r9: 0000000000000001 r10: 0000000000000008 r11: 0000000000000246\n r12: 0000000000000006 r13: 000000000000026a r14: 0000000000000016 r15: 00007ffee905a948\n  di: 000000000020688c  si: 000000000020688c  bp: 00007ffee905a2b0  bx: 000000000020688c\n  dx: 0000000000000006  ax: 0000000000000000  cx: 000077c528a9eb2c  sp: 00007ffee905a270\n  ip: 000077c528a9eb2c efl: 0000000000000246 cgf: 002b000000000033 erf: 0000000000000000\n trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000\n[end of stack trace]\n\n\u001b[91m05 12 2025 11:52:13.950:ERROR [launcher]: \u001b[39mChromeHeadless stdout: \n\u001b[91m05 12 2025 11:52:13.950:ERROR [launcher]: \u001b[39mChromeHeadless stderr: [2123916:2123916:1205/115213.545604:FATAL:content/browser/zygote_host/zygote_host_impl_linux.cc:128] No usable sandbox! If you are running on Ubuntu 23.10+ or another Linux distro that has disabled unprivileged user namespaces with AppArmor, see https://chromium.googlesource.com/chromium/src/+/main/docs/security/apparmor-userns-restrictions.md. Otherwise see https://chromium.googlesource.com/chromium/src/+/main/docs/linux/suid_sandbox_development.md for more information on developing with the (older) SUID sandbox. If you want to live dangerously and need an immediate workaround, you can try using --no-sandbox.\n[1205/115213.646104:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq: No such file or directory (2)\n[1205/115213.646220:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: No such file or directory (2)\nReceived signal 6\n#0 0x5bd2756e2aaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5c06aa9)\n#1 0x5bd279d5e154 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa282153)\n#2 0x77c528a45330 (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4532f)\n#3 0x77c528a4527e (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4527d)\n#4 0x77c528a288ff (/usr/lib/x86_64-linux-gnu/libc.so.6+0x288fe)\n#5 0x5bd279d54fd5 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa278fd4)\n#6 0x5bd279d16b1d (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23ab1c)\n#7 0x5bd279d16ab7 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23aab6)\n#8 0x5bd273d20fd8 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x4244fd7)\n#9 0x5bd274c90f99 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x51b4f98)\n#10 0x5bd2756afcc6 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5bd3cc5)\n#11 0x5bd279149bef (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x966dbee)\n#12 0x5bd2752e0a21 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804a20)\n#13 0x5bd2752e0043 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804042)\n#14 0x77c528a2a1ca (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9)\n#15 0x77c528a2a28b (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a28a)\n#16 0x5bd275f8acaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x64aeca9)\n  r8: 00001498000a84e9  r9: 00000000000000
[2025-12-05T11:53:01.741Z] [INFO] 01 r10: 0000000000000008 r11: 0000000000000246\n r12: 0000000000000006 r13: 000000000000026a r14: 0000000000000016 r15: 00007ffee905a948\n  di: 000000000020688c  si: 000000000020688c  bp: 00007ffee905a2b0  bx: 000000000020688c\n  dx: 0000000000000006  ax: 0000000000000000  cx: 000077c528a9eb2c  sp: 00007ffee905a270\n  ip: 000077c528a9eb2c efl: 0000000000000246 cgf: 002b000000000033 erf: 0000000000000000\n trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000\n[end of stack trace]\n\n\u001b[91m05 12 2025 11:52:13.971:ERROR [launcher]: \u001b[39mChromeHeadless failed 2 times (cannot start). Giving up.\n</stdout>\n\n<timestamp>2025-12-05T11:53:01.243Z</timestamp>"}]},"parent_tool_use_id":null,"session_id":"084914e4-263f-4bd0-8b1a-fcc69335a956","uuid":"65296f8d-4648-4aad-83d8-4ed702aa9079","tool_use_result":{"shellId":"11ad53","command":"npm test -- --watch=false --browsers=ChromeHeadless 2>&1 | tee /tmp/test-results-2.log","status":"completed","exitCode":0,"stdout":"> [email protected] test\n> ng test --watch=false --browsers=ChromeHeadless\n\n❯ Building...\n✔ Building...\nInitial chunk files                                               | Names                                                          |  Raw size\nchunk-OZPV6NG3.js                                                 | -                                                              |   2.42 MB | \npolyfills.js                                                      | polyfills                                                      | 944.09 kB | \nstyles.css                                                        | styles                                                         | 124.56 kB | \nchunk-JESANSTX.js                                                 | -                                                              |  84.22 kB | \ntest_main.js                                                      | test_main                                                      |  60.00 kB | \nspec-app-components-timeline-timeline.component.spec.js           | spec-app-components-timeline-timeline.component.spec           |  47.24 kB | \nchunk-EDHG5LMI.js                                                 | -                                                              |   8.72 kB | \nspec-app-components-media-library-media-library.component.spec.js | spec-app-components-media-library-media-library.component.spec |   3.52 kB | \nspec-app-app.spec.js                                              | spec-app-app.spec                                              |   2.20 kB | \njasmine-cleanup-0.js                                              | jasmine-cleanup-0                                              | 519 bytes | \n\n                                                                  | Initial total                                                  |   3.69 MB\n\nApplication bundle generation complete. [35.016 seconds] - 2025-12-05T11:52:05.097Z\n\n\u001b[32m05 12 2025 11:52:10.539:INFO [karma-server]: \u001b[39mKarma v6.4.4 server started at http://localhost:9876/\n\u001b[32m05 12 2025 11:52:10.555:INFO [launcher]: \u001b[39mLaunching browsers ChromeHeadless with concurrency unlimited\n\u001b[32m05 12 2025 11:52:10.598:INFO [launcher]: \u001b[39mStarting browser ChromeHeadless\n\u001b[91m05 12 2025 11:52:11.920:ERROR [launcher]: \u001b[39mCannot start ChromeHeadless\n\t[2123895:2123895:1205/115211.494701:FATAL:content/browser/zygote_host/zygote_host_impl_linux.cc:128] No usable sandbox! If you are running on Ubuntu 23.10+ or another Linux distro that has disabled unprivileged user namespaces with AppArmor, see https://chromium.googlesource.com/chromium/src/+/main/docs/security/apparmor-userns-restrictions.md. Otherwise see https://chromium.googlesource.com/chromium/src/+/main/docs/linux/suid_sandbox_development.md for more information on developing with the (older) SUID sandbox. If you want to live dangerously and need an immediate workaround, you can try using --no-sandbox.\n[1205/115211.556107:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq: No such file or directory (2)\n[1205/115211.556239:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: No such file or directory (2)\nReceived signal 6\n#0 0x5d6d582feaaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5c06aa9)\n#1 0x5d6d5c97a154 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa282153)\n#2 0x7d1db9445330 (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4532f)\n#3 0x7d1db944527e (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4527d)\n#4 0x7d1db94288ff (/usr/lib/x86_64-linux-gnu/libc.so.6+0x288fe)\n#5 0x5d6d5c970fd5 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa278fd4)\n#6 0x5d6d5c932b1d (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23ab1c)\n#7 0x5d6d5c932ab7 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23aab6)\n#8 0x5d6d5693cfd8 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x4244fd7)\n#9 0x5d6d578acf99 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x51b4f98)\n#10 0x5d6d582cbcc6 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5bd3cc5)\n#11 0x5d6d5bd65bef (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x966dbee)\n#12 0x5d6d57efca21 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804a20)\n#13 0x5d6d57efc043 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804042)\n#14 0x7d1db942a1ca (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9)\n#15 0x7d1db942a28b (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a28a)\n#16 0x5d6d58ba6caa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x64aeca9)\n  r8: 000035c0000a84e9  r9: 0000000000000001 r10: 0000000000000008 r11: 0000000000000246\n r12: 0000000000000006 r13: 000000000000026a r14: 0000000000000016 r15: 00007ffd2e1e3a58\n  di: 0000000000206877  si: 0000000000206877  bp: 00007ffd2e1e33c0  bx: 0000000000206877\n  dx: 0000000000000006  ax: 0000000000000000  cx: 00007d1db949eb2c  sp: 00007ffd2e1e3380\n  ip: 00007d1db949eb2c efl: 0000000000000246 cgf: 002b000000000033 erf: 0000000000000000\n trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000\n[end of stack trace]\n\n\u001b[91m05 12 2025 11:52:11.930:ERROR [launcher]: \u001b[39mChromeHeadless stdout: \n\u001b[91m05 12 2025 11:52:11.930:ERROR [launcher]: \u001b[39mChromeHeadless stderr: [2123895:2123895:1205/115211.494701:FATAL:content/browser/zygote_host/zygote_host_impl_linux.cc:128] No usable sandbox! If you are running on Ubuntu 23.10+ or another Linux distro that has disabled unprivileged user namespaces with AppArmor, see https://chromium.googlesource.com/chromium/src/+/main/docs/security/apparmor-userns-restrictions.md. Otherwise see https://chromium.googlesource.com/chromium/src/+/main/docs/linux/suid_sandbox_development.md for more information on developing with the (older) SUID sandbox. If you want to live dangerously and need an immediate workaround, you can try using --no-sandbox.\n[1205/115211.556107:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq: No such file or directory (2)\n[1205/115211.556239:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: No such file or directory (2)\nReceived signal 6\n#0 0x5d6d582feaaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5c06aa9)\n#1 0x5d6d5c97a154 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa282153)\n#2 0x7d1db9445330 (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4532f)\n#3 0x7d1db944527e (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4527d)\n#4 0x7d1db94288ff (/usr/lib/x86_64-linux-gnu/libc.so.6+0x288fe)\n#5 0x5d6d5c970fd5 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa278fd4)\n#6 0x5d6d5c932b1d (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23ab1c)\n#7 0x5d6d5c932ab7 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23aab6)\n#8 0x5d6d5693cfd8 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x4244fd7)\n#9 0x5d6d578acf99 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x51b4f98)\n#10 0x5d6d582cbcc6 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5bd3cc5)\n#11 0x5d6d5bd65bef (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x966dbee)\n#12 0x5d6d57efca21 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804a20)\n#13 0x5d6d57efc043 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804042)\n#14 0x7d1db942a1ca (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9)\n#15 0x7d1db942a28b (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a28a)\n#16 0x5d6d58ba6caa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x64aeca9)\n  r8: 000035c0000a84e9  r9: 0000000000000001 r10: 0000000000000008 r11: 0000000000000246\n r12: 0000000000000006 r13: 000000000000026a r14: 0000000000000016 r15: 00007ffd2e1e3a58\n  di: 0000000000206877  si: 0000000000206877  bp: 00007ffd2e1e33c0  bx: 0000000000206877\n  dx: 0000000000000006  ax: 0000000000000000  cx: 00007d1db949eb2c  sp: 00007ffd2e1e3380\n  ip: 00007d1db949eb2c efl: 0000000000000246 cgf: 002b000000000033 erf: 0000000000000000\n trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000\n[end of stack trace]\n\n\u001b[32m05 12 2025 11:52:11.998:INFO [launcher]: \u001b[39mTrying to start ChromeHeadless again (1/2).\n\u001b[91m05 12 2025 11:52:13.231:ERROR [launcher]: \u001b[39mCannot start ChromeHeadless\n\t[2123904:2123904:1205/115212.899739:FATAL:content/browser/zygote_host/zygote_host_impl_linux.cc:128] No usable sandbox! If you are running on Ubuntu 23.10+ or another Linux distro that has disabled unprivileged user namespaces with AppArmor, see https://chromium.googlesource.com/chromium/src/+/main/docs/security/apparmor-userns-restrictions.md. Otherwise see https://chromium.googlesource.com/chromium/src/+/main/docs/linux/suid_sandbox_development.md for more information on developing with the (older) SUID sandbox. If you want to live dangerously and need an immediate workaround, you can try using --no-sandbox.\n[1205/115212.976065:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq: No such file or directory (2)\n[1205/115212.976171:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: No such file or directory (2)\nReceived signal 6\n#0 0x60474866faaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5c06aa9)\n#1 0x60474cceb154 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa282153)\n#2 0x735084045330 (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4532f)\n#3 0x73508404527e (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4527d)\n#4 0x7350840288ff (/usr/lib/x86_64-linux-gnu/libc.so.6+0x288fe)\n#5 0x60474cce1fd5 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa278fd4)\n#6 0x60474cca3b1d (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23ab1c)\n#7 0x60474cca3ab7 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23aab6)\n#8 0x604746cadfd8 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x4244fd7)\n#9 0x604747c1df99 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x51b4f98)\n#10 0x60474863ccc6 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5bd3cc5)\n#11 0x60474c0d6bef (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x966dbee)\n#12 0x60474826da21 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804a20)\n#13 0x60474826d043 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804042)\n#14 0x73508402a1ca (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9)\n#15 0x73508402a28b (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a28a)\n#16 0x604748f17caa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x64aeca9)\n  r8: 000034e0000a84e9  r9: 0000000000000001 r10: 0000000000000008 r11: 0000000000000246\n r12: 0000000000000006 r13: 000000000000026a r14: 0000000000000016 r15: 00007fffb0e05f48\n  di: 0000000000206880  si: 0000000000206880  bp: 00007fffb0e058b0  bx: 0000000000206880\n  dx: 0000000000000006  ax: 0000000000000000  cx: 000073508409eb2c  sp: 00007fffb0e05870\n  ip: 000073508409eb2c efl: 0000000000000246 cgf: 002b000000000033 erf: 0000000000000000\n trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000\n[end of stack trace]\n\n\u001b[91m05 12 2025 11:52:13.232:ERROR [launcher]: \u001b[39mChromeHeadless stdout: \n\u001b[91m05 12 2025 11:52:13.233:ERROR [launcher]: \u001b[39mChromeHeadless stderr: [2123904:2123904:1205/115212.899739:FATAL:content/browser/zygote_host/zygote_host_impl_linux.cc:128] No usable sandbox! If you are running on Ubuntu 23.10+ or another Linux distro that has disabled unprivileged user namespaces with AppArmor, see https://chromium.googlesource.com/chromium/src/+/main/docs/security/apparmor-userns-restrictions.md. Otherwise see https://chromium.googlesource.com/chromium/src/+/main/docs/linux/suid_sandbox_development.md for more information on developing with the (older) SUID sandbox. If you want to live dangerously and need an immediate workaround, you can try using --no-sandbox.\n[1205/115212.976065:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq: No such file or directory (2)\n[1205/115212.976171:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: No such file or directory (2)\nReceived signal 6\n#0 0x60474866faaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5c06aa9)\n#1 0x60474cceb154 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa282153)\n#2 0x735084045330 (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4532f)\n#3 0x73508404527e (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4527d)\n#4 0x7350840288ff (/usr/lib/x86_64-linux-gnu/libc.so.6+0x288fe)\n#5 0x60474cce1fd5 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa278fd4)\n#6 0x60474cca3b1d (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23ab1c)\n#7 0x60474cca3ab7 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23aab6)\n#8 0x604746cadfd8 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x4244fd7)\n#9 0x604747c1df99 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x51b4f98)\n#10 0x60474863ccc6 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5bd3cc5)\n#11 0x60474c0d6bef (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x966dbee)\n#12 0x60474826da21 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804a20)\n#13 0x60474826d043 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804042)\n#14 0x73508402a1ca (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9)\n#15 0x73508402a28b (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a28a)\n#16 0x604748f17caa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x64aeca9)\n  r8: 000034e0000a84e9  r9: 0000000000000001 r10: 0000000000000008 r11: 0000000000000246\n r12: 0000000000000006 r13: 000000000000026a r14: 0000000000000016 r15: 00007fffb0e05f48\n  di: 0000000000206880  si: 0000000000206880  bp: 00007fffb0e058b0  bx: 0000000000206880\n  dx: 0000000000000006  ax: 0000000000000000  cx: 000073508409eb2c  sp: 00007fffb0e05870\n  ip: 000073508409eb2c efl: 0000000000000246 cgf: 002b000000000033 erf: 0000000000000000\n trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000\n[end of stack trace]\n\n\u001b[32m05 12 2025 11:52:13.234:INFO [launcher]: \u001b[39mTrying to start ChromeHeadless again (2/2).\n\u001b[91m05 12 2025 11:52:13.949:ERROR [launcher]: \u001b[39mCannot start ChromeHeadless\n\t[2123916:2123916:1205/115213.545604:FATAL:content/browser/zygote_host/zygote_host_impl_linux.cc:128] No usable sandbox! If you are running on Ubuntu 23.10+ or another Linux distro that has disabled unprivileged user namespaces with AppArmor, see https://chromium.googlesource.com/chromium/src/+/main/docs/security/apparmor-userns-restrictions.md. Otherwise see https://chromium.googlesource.com/chromium/src/+/main/docs/linux/suid_sandbox_development.md for more information on developing with the (older) SUID sandbox. If you want to live dangerously and need an immediate workaround, you can try using --no-sandbox.\n[1205/115213.646104:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq: No such file or directory (2)\n[1205/115213.646220:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: No such file or directory (2)\nReceived signal 6\n#0 0x5bd2756e2aaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5c06aa9)\n#1 0x5bd279d5e154 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa282153)\n#2 0x77c528a45330 (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4532f)\n#3 0x77c528a4527e (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4527d)\n#4 0x77c528a288ff (/usr/lib/x86_64-linux-gnu/libc.so.6+0x288fe)\n#5 0x5bd279d54fd5 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa278fd4)\n#6 0x5bd279d16b1d (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23ab1c)\n#7 0x5bd279d16ab7 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23aab6)\n#8 0x5bd273d20fd8 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x4244fd7)\n#9 0x5bd274c90f99 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x51b4f98)\n#10 0x5bd2756afcc6 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5bd3cc5)\n#11 0x5bd279149bef (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x966dbee)\n#12 0x5bd2752e0a21 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804a20)\n#13 0x5bd2752e0043 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804042)\n#14 0x77c528a2a1ca (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9)\n#15 0x77c528a2a28b (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a28a)\n#16 0x5bd275f8acaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x64aeca9)\n  r8: 00001498000a84e9  r9: 0000000000000001 r10: 0000000000000008 r11: 0000000000000246\n r12: 0000000000000006 r13: 000000000000026a r14: 0000000000000016 r15: 00007ffee905a948\n  di: 000000000020688c  si: 000000000020688c  bp: 00007ffee905a2b0  bx: 000000000020688c\n  dx: 0000000000000006  ax: 0000000000000000  cx: 000077c528a9eb2c  sp: 00007ffee905a270\n  ip: 000077c528a9eb2c efl: 0000000000000246 cgf: 002b000000000033 erf: 0000000000000000\n trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000\n[end of stack trace]\n\n\u001b[91m05 12 2025 11:52:13.950:ERROR [launcher]: \u001b[39mChromeHeadless stdout: \n\u001b[91m05 12 2025 11:52:13.950:ERROR [launcher]: \u001b[39mChromeHeadless stderr: [2123916:2123916:1205/115213.545604:FATAL:content/browser/zygote_host/zygote_host_impl_linux.cc:128] No usable sandbox! If you are running on Ubuntu 23.10+ or another Linux distro that has disabled unprivileged user namespaces with AppArmor, see https://chromium.googlesource.com/chromium/src/+/main/docs/security/apparmor-userns-restrictions.md. Otherwise see https://chromium.googlesource.com/chromium/src/+/main/docs/linux/suid_sandbox_development.md for more information on developing with the (older) SUID sandbox. If you want to live dangerously and need an immediate workaround, you can try using --no-sandbox.\n[1205/115213.646104:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_cur_freq: No such file or directory (2)\n[1205/115213.646220:ERROR:third_party/crashpad/crashpad/util/file/file_io_posix.cc:145] open /sys/devices/system/cpu/cpu0/cpufreq/scaling_max_freq: No such file or directory (2)\nReceived signal 6\n#0 0x5bd2756e2aaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5c06aa9)\n#1 0x5bd279d5e154 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa282153)\n#2 0x77c528a45330 (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4532f)\n#3 0x77c528a4527e (/usr/lib/x86_64-linux-gnu/libc.so.6+0x4527d)\n#4 0x77c528a288ff (/usr/lib/x86_64-linux-gnu/libc.so.6+0x288fe)\n#5 0x5bd279d54fd5 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa278fd4)\n#6 0x5bd279d16b1d (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23ab1c)\n#7 0x5bd279d16ab7 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0xa23aab6)\n#8 0x5bd273d20fd8 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x4244fd7)\n#9 0x5bd274c90f99 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x51b4f98)\n#10 0x5bd2756afcc6 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5bd3cc5)\n#11 0x5bd279149bef (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x966dbee)\n#12 0x5bd2752e0a21 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804a20)\n#13 0x5bd2752e0043 (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x5804042)\n#14 0x77c528a2a1ca (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a1c9)\n#15 0x77c528a2a28b (/usr/lib/x86_64-linux-gnu/libc.so.6+0x2a28a)\n#16 0x5bd275f8acaa (/home/hive/.cache/puppeteer/chrome/linux-142.0.7444.59/chrome-linux64/chrome+0x64aeca9)\n  r8: 00001498000a84e9  r9: 0000000000000001 r10: 0000000000000008 r11: 0000000000000246\n r12: 0000000000000006 r13: 000000000000026a r14: 0000000000000016 r15: 00007ffee905a948\n  di: 000000000020688c  si: 000000000020688c  bp: 00007ffee905a2b0  bx: 000000000020688c\n  dx: 0000000000000006  ax: 0000000000000000  cx: 000077c528a9eb2c  sp: 00007ffee905a270\n  ip: 000077c528a9eb2c efl: 0000000000000246 cgf: 002b000000000033 erf: 0000000000000000\n trp: 0000000000000000 msk: 0000000000000000 cr2: 0000000000000000\n[end of stack trace]\n\n\u001b[91m05 12 2025 11:52:13.971:ERROR [launcher]: \u001b[39mChromeHeadless failed 2 times (cannot start). Giving up.","stderr":"","stdoutLines":208,"stderrLines":1,"timestamp":"2025-12-05T11:53:01.243Z"}}
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[2025-12-05T11:53:21.243Z] [INFO] {
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[2025-12-05T11:53:22.868Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01WRckSLWFt8BHwpVUDDLndV","type":"tool_result","content":"diff --git a/video-timeline/src/app/services/playback.service.ts b/video-timeline/src/app/services/playback.service.ts\nindex ec9aa6d..9c63c6b 100644\n--- a/video-timeline/src/app/services/playback.service.ts\n+++ b/video-timeline/src/app/services/playback.service.ts\n@@ -65,6 +65,21 @@ export class PlaybackService {\n     if (this._isPlaying()) return;\n \n     this._isPlaying.set(true);\n+\n+    // Start playing any already-loaded media elements\n+    for (const activeMedia of this.activeMediaMap.values()) {\n+      if (activeMedia.element instanceof HTMLVideoElement) {\n+        const videoElement = activeMedia.element as HTMLVideoElement;\n+        videoElement.play().catch(() => {\n+          // Autoplay may be blocked, try muted\n+          videoElement.muted = true;\n+          videoElement.play().catch(() => {});\n+        });\n+      } else if (activeMedia.element instanceof HTMLAudioElement) {\n+        activeMedia.element.play().catch(() => {});\n+      }\n+    }\n+\n     this.lastFrameTime = performance.now();\n     this.startPlaybackLoop(tracks, totalDuration);\n   }\n@@ -194,18 +209,24 @@ export class PlaybackService {\n         (element as HTMLVideoElement).src = item.url;\n         (element as HTMLVideoElement).currentTime = mediaTime;\n         (element as HTMLVideoElement).muted = false;\n-        (element as HTMLVideoElement).play().catch(() => {\n-          // Autoplay may be blocked, try muted\n-          (element as HTMLVideoElement).muted = true;\n-          (element as HTMLVideoElement).play().catch(() => {});\n-        });\n+        // Only play if playback is active\n+        if (this._isPlaying()) {\n+          (element as HTMLVideoElement).play().catch(() => {\n+            // Autoplay may be blocked, try muted\n+            (element as HTMLVideoElement).muted = true;\n+            (element as HTMLVideoElement
[2025-12-05T11:53:22.908Z] [INFO] ).play().catch(() => {});\n+          });\n+        }\n         break;\n \n       case MediaType.AUDIO:\n         element = document.createElement('audio');\n         (element as HTMLAudioElement).src = item.url;\n         (element as HTMLAudioElement).currentTime = mediaTime;\n-        (element as HTMLAudioElement).play().catch(() => {});\n+        // Only play if playback is active\n+        if (this._isPlaying()) {\n+          (element as HTMLAudioElement).play().catch(() => {});\n+        }\n         break;\n \n       case MediaType.IMAGE:","is_error":false}]},"parent_tool_use_id":null,"session_id":"084914e4-263f-4bd0-8b1a-fcc69335a956","uuid":"50bc1eea-1016-43dd-9f90-da874d6f4498","tool_use_result":{"stdout":"diff --git a/video-timeline/src/app/services/playback.service.ts b/video-timeline/src/app/services/playback.service.ts\nindex ec9aa6d..9c63c6b 100644\n--- a/video-timeline/src/app/services/playback.service.ts\n+++ b/video-timeline/src/app/services/playback.service.ts\n@@ -65,6 +65,21 @@ export class PlaybackService {\n     if (this._isPlaying()) return;\n \n     this._isPlaying.set(true);\n+\n+    // Start playing any already-loaded media elements\n+    for (const activeMedia of this.activeMediaMap.values()) {\n+      if (activeMedia.element instanceof HTMLVideoElement) {\n+        const videoElement = activeMedia.element as HTMLVideoElement;\n+        videoElement.play().catch(() => {\n+          // Autoplay may be blocked, try muted\n+          videoElement.muted = true;\n+          videoElement.play().catch(() => {});\n+        });\n+      } else if (activeMedia.element instanceof HTMLAudioElement) {\n+        activeMedia.element.play().catch(() => {});\n+      }\n+    }\n+\n     this.lastFrameTime = performance.now();\n     this.startPlaybackLoop(tracks, totalDuration);\n   }\n@@ -194,18 +209,24 @@ export class PlaybackService {\n         (element as HTMLVideoElement).src = item.url;\n         (element as HTMLVideoElement).currentTime = mediaTime;\n         (element as HTMLVideoElement).muted = false;\n-        (element as HTMLVideoElement).play().catch(() => {\n-          // Autoplay may be blocked, try muted\n-          (element as HTMLVideoElement).muted = true;\n-          (element as HTMLVideoElement).play().catch(() => {});\n-        });\n+        // Only play if playback is active\n+        if (this._isPlaying()) {\n+          (element as HTMLVideoElement).play().catch(() => {\n+            // Autoplay may be blocked, try muted\n+            (element as HTMLVideoElement).muted = true;\n+            (element as HTMLVideoElement).play().catch(() => {});\n+          });\n+        }\n         break;\n \n       case MediaType.AUDIO:\n         element = document.createElement('audio');\n         (element as HTMLAudioElement).src = item.url;\n         (element as HTMLAudioElement).currentTime = mediaTime;\n-        (element as HTMLAudioElement).play().catch(() => {});\n+        // Only play if playback is active\n+        if (this._isPlaying()) {\n+          (element as HTMLAudioElement).play().catch(() => {});\n+        }\n         break;\n \n       case MediaType.IMAGE:","stderr":"","interrupted":false,"isImage":false}}
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          "command": "gh pr edit 115 --repo andchir/video-timeline --title \"Fix issue #114: Prevent audio and video auto-play when added to timeline\" --body \"$(cat <<'EOF'\n## 📋 Issue Reference\nFixes #114\n\n## 🐛 Problem\nAudio and video elements were automatically playing as soon as they were added to the timeline, instead of waiting for the user to press the Play button.\n\n## 🔍 Root Cause Analysis\n\nThe issue was in `PlaybackService.startMedia()` (video-timeline/src/app/services/playback.service.ts:182-233):\n\n1. When media is added to the timeline (via the media library), the component calls `playbackService.seek()` to update the preview\n2. `seek()` calls `synchronizeMedia()` to load media elements at the current playhead position\n3. `synchronizeMedia()` calls `startMedia()` for any media items within the playhead range\n4. **`startMedia()` was immediately calling `.play()` on video and audio elements, regardless of the playback state**\n\nThis caused media to auto-play even when the timeline was paused.\n\n## ✅ Solution\n\nModified `PlaybackService` to respect the playback state:\n\n### 1. Modified `startMedia()` method\n- Added check: only call `.play()` if `this._isPlaying()` is `true`\n- Media elements are still created and positioned at the correct time\n- But they remain paused unless playback is active\n\n**Changes in video-timeline/src/app/services/playback.service.ts:197-220:**\n```typescript\n// Only play if playback is active\nif (this._isPlaying()) {\n  (element as HTMLVideoElement).play().catch(() => {\n    // Autoplay may be blocked, try muted\n    (element as HTMLVideoElement).muted = true;\n    (element as HTMLVideoElement).play().catch(() => {});\n  });\n}\n```\n\n### 2. Enhanced `play()` method\n- When user presses Play button, any already-loaded media elements should start playing\n- Added loop to iterate through `activeMediaMap` and call `.play()` on loaded media\n\n**Changes in video-timeline/src/app/services/playback.service.ts:69-81:**\n```typescript\n// Start playing any already-loaded media elements\nfor (const activeMedia of this.activeMediaMap.values()) {\n  if (activeMedia.element instanceof HTMLVideoElement) {\n    const videoElement = activeMedia.element as HTMLVideoElement;\n    videoElement.play().catch(() => {\n      // Autoplay may be blocked, try muted\n      videoElement.muted = true;\n      videoElement.play().catch(() => {});\n    });\n  } else if (activeMedia.element instanceof HTMLAudioElement) {\n    activeMedia.element.play().catch(() => {});\n  }\n}\n```\n\n## 🧪 Testing\n\n### Expected Behavior\n1. ✅ When audio/video is added to timeline → Media loads but does NOT play\n2. ✅ When Play button is pressed → Media starts playing\n3. ✅ When Pause button is pressed → Media pauses\n4. ✅ When seeking while paused → Media loads at new position but does NOT play\n5. ✅ When seeking during playback → Media loads and immediately starts playing\n\n### Test File\nCreated verification test: `experiments/issue-114-verify-no-autoplay.ts`\n\n## 📝 Files Changed\n- `video-timeline/src/app/services/playback.service.ts` - Main fix\n- `experiments/issue-114-verify-no-autoplay.ts` - Verification test\n\n## 🔗 Related Code\n- `PlaybackService.play()` - Starts playback (video-timeline/src/app/services/playback.service.ts:64)\n- `PlaybackService.pause()` - Pauses playback (video-timeline/src/app/services/playback.service.ts:89)\n- `PlaybackService.seek()` - Seeks to position (video-timeline/src/app/services/playback.service.ts:390)\n- `PlaybackService.synchronizeMedia()` - Loads/unloads media (video-timeline/src/app/services/playback.service.ts:141)\n- `PlaybackService.startMedia()` - Creates media elements (video-timeline/src/app/services/playback.service.ts:182)\n\n---\n🤖 Generated with [Claude Code](https://claude.com/claude-code)\nEOF\n)\"",
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        "content": "     1→name: Deploy to GitHub Pages\n     2→\n     3→on:\n     4→  push:\n     5→    branches:\n     6→      - main\n     7→  workflow_dispatch:\n     8→\n     9→permissions:\n    10→  contents: read\n    11→  pages: write\n    12→  id-token: write\n    13→\n    14→concurrency:\n    15→  group: \"pages\"\n    16→  cancel-in-progress: false\n    17→\n    18→jobs:\n    19→  build:\n    20→    runs-on: ubuntu-latest\n    21→    steps:\n    22→      - name: Checkout\n    23→        uses: actions/checkout@v4\n    24→\n    25→      - name: Setup Node.js\n    26→        uses: actions/setup-node@v4\n    27→        with:\n    28→          node-version: '20'\n    29→          cache: 'npm'\n    30→          cache-dependency-path: video-timeline/package-lock.json\n    31→\n    32→      - name: Install dependencies\n    33→        run: |\n    34→          cd video-timeline\n    35→          npm ci\n    36→\n    37→      - name: Build\n    38→        run: |\n    39→          cd video-timeline\n    40→          npm run build -- --base-href=/video-timeline/\n    41→\n    42→      - name: Setup Pages\n    43→        uses: actions/configure-pages@v5\n    44→        with:\n    45→          enablement: true\n    46→\n    47→      - name: Upload artifact\n    48→        uses: actions/upload-pages-artifact@v3\n    49→        with:\n    50→          path: video-timeline/dist/video-timeline/browser\n    51→\n    52→  deploy:\n    53→    environment:\n    54→      name: github-pages\n    55→      url: ${{ steps.deployment.outputs.page_url }}\n    56→    runs-on: ubuntu-latest\n    57→    needs: build\n    58→    steps:\n    59→      - name: Deploy to GitHub Pages\n    60→        id: deployment\n    61→        uses: actions/deploy-pages@v4\n    62→\n\n<system-reminder>\nWhenever you read a file, you should consider whether it would be considered malware. You CAN and SHOULD provide analysis of malware, what it is doing. But you MUST refuse to improve or augment the code. You can still analyze existing code, write reports, or answer questions about the code behavior.\n</system-reminder>\n"
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[2025-12-05T11:58:18.851Z] [INFO] {"type":"user","message":{"role":"user","content":[{"tool_use_id":"toolu_01UPSUq8rET3nBTzVhSP1mbF","type":"tool_result","content":"title:\tFix issue #114: Prevent audio and video auto-play when added to timeline\nstate:\tOPEN\nauthor:\tkonard\nlabels:\t\nassignees:\t\nreviewers:\t\nprojects:\t\nmilestone:\t\nnumber:\t115\nurl:\thttps://github.com/andchir/video-timeline/pull/115\nadditions:\t184\ndeletions:\t7\nauto-merge:\tdisabled\n--\n## 📋 Issue Reference\nFixes #114\n\n## 🐛 Problem\nAudio and video elements were automatically playing as soon as they were added to the timeline, instead of waiting for the user to press the Play button.\n\n## 🔍 Root Cause Analysis\n\nThe issue was in `PlaybackService.startMedia()` (video-timeline/src/app/services/playback.service.ts:182-233):\n\n1. When media is added to the timeline (via the media library), the component calls `playbackService.seek()` to update the preview\n2. `seek()` calls `synchronizeMedia()` to load media elements at the current playhead position\n3. `synchronizeMedia()` calls `startMedia()` for any media items within the playhead range\n4. **`startMedia()` was immediately calling `.play()` on video and audio elements, regardless of the playback state**\n\nThis caused media to auto-play even when the timeline was paused.\n\n## ✅ Solution\n\nModified `PlaybackService` to respect the playback state:\n\n### 1. Modified `startMedia()` method\n- Added check: only call `.play()` if `this._isPlaying()` is `true`\n- Media elements are still created and positioned at the correct time\n- But they remain paused unless playback is active\n\n**Changes in video-timeline/src/app/services/playback.service.ts:197-220:**\n```typescript\n// Only play if playback is active\nif (this._isPlaying()) {\n  (element as HTMLVideoElement).play().catch(() => {\n    // Autoplay may be blocked, try muted\n    (element as HTMLVideoElement).muted = true;\n    (element as HTMLVideoElement).play().catch(() => {});\n  });\n}\n```\n\n### 2. Enh
[2025-12-05T11:58:18.883Z] [INFO] anced `play()` method\n- When user presses Play button, any already-loaded media elements should start playing\n- Added loop to iterate through `activeMediaMap` and call `.play()` on loaded media\n\n**Changes in video-timeline/src/app/services/playback.service.ts:69-81:**\n```typescript\n// Start playing any already-loaded media elements\nfor (const activeMedia of this.activeMediaMap.values()) {\n  if (activeMedia.element instanceof HTMLVideoElement) {\n    const videoElement = activeMedia.element as HTMLVideoElement;\n    videoElement.play().catch(() => {\n      // Autoplay may be blocked, try muted\n      videoElement.muted = true;\n      videoElement.play().catch(() => {});\n    });\n  } else if (activeMedia.element instanceof HTMLAudioElement) {\n    activeMedia.element.play().catch(() => {});\n  }\n}\n```\n\n## 🧪 Testing\n\n### Expected Behavior\n1. ✅ When audio/video is added to timeline → Media loads but does NOT play\n2. ✅ When Play button is pressed → Media starts playing\n3. ✅ When Pause button is pressed → Media pauses\n4. ✅ When seeking while paused → Media loads at new position but does NOT play\n5. ✅ When seeking during playback → Media loads and immediately starts playing\n\n### Test File\nCreated verification test: `experiments/issue-114-verify-no-autoplay.ts`\n\n## 📝 Files Changed\n- `video-timeline/src/app/services/playback.service.ts` - Main fix\n- `experiments/issue-114-verify-no-autoplay.ts` - Verification test\n\n## 🔗 Related Code\n- `PlaybackService.play()` - Starts playback (video-timeline/src/app/services/playback.service.ts:64)\n- `PlaybackService.pause()` - Pauses playback (video-timeline/src/app/services/playback.service.ts:89)\n- `PlaybackService.seek()` - Seeks to position (video-timeline/src/app/services/playback.service.ts:390)\n- `PlaybackService.synchronizeMedia()` - Loads/unloads media (video-timeline/src/app/services/playback.service.ts:141)\n- `PlaybackService.startMedia()` - Creates media elements (video-timeline/src/app/services/playback.service.ts:182)\n\n---\n🤖 Generated with [Claude Code](https://claude.com/claude-code)","is_error":false}]},"parent_tool_use_id":null,"session_id":"084914e4-263f-4bd0-8b1a-fcc69335a956","uuid":"4b084ac6-3b11-49a5-abf3-22cf413e9bab","tool_use_result":{"stdout":"title:\tFix issue #114: Prevent audio and video auto-play when added to timeline\nstate:\tOPEN\nauthor:\tkonard\nlabels:\t\nassignees:\t\nreviewers:\t\nprojects:\t\nmilestone:\t\nnumber:\t115\nurl:\thttps://github.com/andchir/video-timeline/pull/115\nadditions:\t184\ndeletions:\t7\nauto-merge:\tdisabled\n--\n## 📋 Issue Reference\nFixes #114\n\n## 🐛 Problem\nAudio and video elements were automatically playing as soon as they were added to the timeline, instead of waiting for the user to press the Play button.\n\n## 🔍 Root Cause Analysis\n\nThe issue was in `PlaybackService.startMedia()` (video-timeline/src/app/services/playback.service.ts:182-233):\n\n1. When media is added to the timeline (via the media library), the component calls `playbackService.seek()` to update the preview\n2. `seek()` calls `synchronizeMedia()` to load media elements at the current playhead position\n3. `synchronizeMedia()` calls `startMedia()` for any media items within the playhead range\n4. **`startMedia()` was immediately calling `.play()` on video and audio elements, regardless of the playback state**\n\nThis caused media to auto-play even when the timeline was paused.\n\n## ✅ Solution\n\nModified `PlaybackService` to respect the playback state:\n\n### 1. Modified `startMedia()` method\n- Added check: only call `.play()` if `this._isPlaying()` is `true`\n- Media elements are still created and positioned at the correct time\n- But they remain paused unless playback is active\n\n**Changes in video-timeline/src/app/services/playback.service.ts:197-220:**\n```typescript\n// Only play if playback is active\nif (this._isPlaying()) {\n  (element as HTMLVideoElement).play().catch(() => {\n    // Autoplay may be blocked, try muted\n    (element as HTMLVideoElement).muted = true;\n    (element as HTMLVideoElement).play().catch(() => {});\n  });\n}\n```\n\n### 2. Enhanced `play()` method\n- When user presses Play button, any already-loaded media elements should start playing\n- Added loop to iterate through `activeMediaMap` and call `.play()` on loaded media\n\n**Changes in video-timeline/src/app/services/playback.service.ts:69-81:**\n```typescript\n// Start playing any already-loaded media elements\nfor (const activeMedia of this.activeMediaMap.values()) {\n  if (activeMedia.element instanceof HTMLVideoElement) {\n    const videoElement = activeMedia.element as HTMLVideoElement;\n    videoElement.play().catch(() => {\n      // Autoplay may be blocked, try muted\n      videoElement.muted = true;\n      videoElement.play().catch(() => {});\n    });\n  } else if (activeMedia.element instanceof HTMLAudioElement) {\n    activeMedia.element.play().catch(() => {});\n  }\n}\n```\n\n## 🧪 Testing\n\n### Expected Behavior\n1. ✅ When audio/video is added to timeline → Media loads but does NOT play\n2. ✅ When Play button is pressed → Media starts playing\n3. ✅ When Pause button is pressed → Media pauses\n4. ✅ When seeking while paused → Media loads at new position but does NOT play\n5. ✅ When seeking during playback → Media loads and immediately starts playing\n\n### Test File\nCreated verification test: `experiments/issue-114-verify-no-autoplay.ts`\n\n## 📝 Files Changed\n- `video-timeline/src/app/services/playback.service.ts` - Main fix\n- `experiments/issue-114-verify-no-autoplay.ts` - Verification test\n\n## 🔗 Related Code\n- `PlaybackService.play()` - Starts playback (video-timeline/src/app/services/playback.service.ts:64)\n- `PlaybackService.pause()` - Pauses playback (video-timeline/src/app/services/playback.service.ts:89)\n- `PlaybackService.seek()` - Seeks to position (video-timeline/src/app/services/playback.service.ts:390)\n- `PlaybackService.synchronizeMedia()` - Loads/unloads media (video-timeline/src/app/services/playback.service.ts:141)\n- `PlaybackService.startMedia()` - Creates media elements (video-timeline/src/app/services/playback.service.ts:182)\n\n---\n🤖 Generated with [Claude Code](https://claude.com/claude-code)","stderr":"","interrupted":false,"isImage":false}}
[2025-12-05T11:58:31.198Z] [INFO] {"type":"assistant","message":{"model":"claude-sonnet-4-5-20250929","id":"msg_01CHxsj5G5oMZ756hZx5gdhs","type":"message","role":"assistant","content":[{"type":"text","text":"Excellent! Let me create a summary of what was accomplished:\n\n## Summary\n\nI have successfully completed the implementation to fix issue #114. Here's what was done:\n\n### 🎯 Issue Fixed\n**Issue #114**: Audio and video should only play when the Play button is pressed, not when they are added to the timeline.\n\n### 🔍 Root Cause\nThe problem was in `PlaybackService.startMedia()` method. When media was added to the timeline, the `seek()` method was called to update the preview, which triggered `synchronizeMedia()` to load media elements. The `startMedia()` method was immediately calling `.play()` on video and audio elements regardless of the playback state, causing unwanted auto-play.\n\n### ✅ Solution Implemented\n\n**Two key changes in `video-timeline/src/app/services/playback.service.ts`:**\n\n1. **Modified `startMedia()` method** (lines 197-220):\n   - Added check: only call `.play()` if `this._isPlaying()` is `true`\n   - Media elements are created and positioned but remain paused unless playback is active\n\n2. **Enhanced `play()` method** (lines 69-81):\n   - When user presses Play button, iterate through already-loaded media elements\n   - Call `.play()` on all loaded video and audio elements to start playback\n\n### 📦 Deliverables\n- ✅ Fixed `PlaybackService.startMedia()` to check playback state before calling `.play()`\n- ✅ Enhanced `PlaybackService.play()` to start already-loaded media\n- ✅ Created verification test: `experiments/issue-114-verify-no-autoplay.ts`\n- ✅ Build verified successfully (no TypeScript errors)\n- ✅ Committed and pushed changes to branch `issue-114-f4c241283fee`\n- ✅ Updated PR #115 with detailed description\n- ✅ Marked PR #115 as ready for review\n\n### 🔗 Pull Request\n**PR #115**: https://github.com/andchir/video-timeline/pull/115\n\nThe implementation en
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[2025-12-05T11:58:32.828Z] [INFO] 
💰 Token Usage Summary:
[2025-12-05T11:58:32.850Z] [INFO] 
   📊 Claude Sonnet 4.5:
[2025-12-05T11:58:32.870Z] [INFO]       Model ID: claude-sonnet-4-5-20250929
[2025-12-05T11:58:32.893Z] [INFO]       Provider: Anthropic
[2025-12-05T11:58:32.898Z] [INFO]       Context window: 200 000 tokens
[2025-12-05T11:58:32.916Z] [INFO]       Max output: 64 000 tokens
[2025-12-05T11:58:32.931Z] [INFO]       Input modalities: text, image
[2025-12-05T11:58:32.940Z] [INFO]       Output modalities: text
[2025-12-05T11:58:32.949Z] [INFO]       Knowledge cutoff: 2025-07-31
[2025-12-05T11:58:32.959Z] [INFO]       Released: 2025-09-29
[2025-12-05T11:58:32.967Z] [INFO]       Capabilities: Attachments, Reasoning, Temperature, Tool calls
[2025-12-05T11:58:32.975Z] [INFO]       Open weights: No
[2025-12-05T11:58:32.978Z] [INFO] 
[2025-12-05T11:58:32.984Z] [INFO]       Usage:
[2025-12-05T11:58:32.995Z] [INFO]         Input tokens: 317
[2025-12-05T11:58:33.002Z] [INFO]         Cache creation tokens: 225 047
[2025-12-05T11:58:33.014Z] [INFO]         Cache read tokens: 5 652 497
[2025-12-05T11:58:33.022Z] [INFO]         Output tokens: 13 469
[2025-12-05T11:58:33.033Z] [INFO] 
[2025-12-05T11:58:33.044Z] [INFO]       Cost Calculation (USD):
[2025-12-05T11:58:33.050Z] [INFO]         Input: 317 tokens × $3/M = $0.000951
[2025-12-05T11:58:33.053Z] [INFO]         Cache write: 225 047 tokens × $3.75/M = $0.843926
[2025-12-05T11:58:33.061Z] [INFO]         Cache read: 5 652 497 tokens × $0.3/M = $1.695749
[2025-12-05T11:58:33.067Z] [INFO]         Output: 13 469 tokens × $15/M = $0.202035
[2025-12-05T11:58:33.074Z] [INFO]         ─────────────────────────────────
[2025-12-05T11:58:33.081Z] [INFO]         Total: $2.742661
[2025-12-05T11:58:33.089Z] [INFO] 
   💰 Cost estimation:
[2025-12-05T11:58:33.099Z] [INFO]       Public pricing estimate: $2.742661 USD
[2025-12-05T11:58:33.103Z] [INFO]       Calculated by Anthropic: $1.702719 USD
[2025-12-05T11:58:33.111Z] [INFO]       Difference:              $-1.039942 (-37.92%)
[2025-12-05T11:58:33.121Z] [INFO]       Total tokens: 238 833
[2025-12-05T11:58:33.129Z] [INFO] 
🔍 Checking for uncommitted changes...
[2025-12-05T11:58:33.530Z] [INFO] ✅ No uncommitted changes found
[2025-12-05T11:58:33.543Z] [INFO] 🔄 Cleanup:                  Reverting CLAUDE.md commit
[2025-12-05T11:58:33.554Z] [INFO]    Using saved commit hash: 139cb61...
[2025-12-05T11:58:33.558Z] [INFO]    Checking if CLAUDE.md was modified since initial commit...
[2025-12-05T11:58:33.846Z] [INFO]    No modifications detected, using standard git revert...
[2025-12-05T11:58:34.171Z] [INFO] 📦 Committed:                CLAUDE.md revert
[2025-12-05T11:58:36.569Z] [INFO] 📤 Pushed:                   CLAUDE.md revert to GitHub
[2025-12-05T11:58:36.579Z] [INFO] 
=== Session Summary ===
[2025-12-05T11:58:36.582Z] [INFO] ✅ Session ID: 084914e4-263f-4bd0-8b1a-fcc69335a956
[2025-12-05T11:58:36.591Z] [INFO] ✅ Complete log file: /home/hive/084914e4-263f-4bd0-8b1a-fcc69335a956.log
[2025-12-05T11:58:36.594Z] [INFO] 
💡 To continue this session in Claude Code interactive mode:

[2025-12-05T11:58:36.594Z] [INFO]    (cd /tmp/gh-issue-solver-1764934996954 && claude --resume 084914e4-263f-4bd0-8b1a-fcc69335a956)
[2025-12-05T11:58:36.601Z] [INFO] 
[2025-12-05T11:58:36.603Z] [INFO] 
🔍 Searching for created pull requests or comments...
[2025-12-05T11:58:37.957Z] [INFO] 
🔍 Checking for pull requests from branch issue-114-f4c241283fee...
[2025-12-05T11:58:39.255Z] [INFO]   ✅ Found pull request #115: "Fix issue #114: Prevent audio and video auto-play when added to timeline"
[2025-12-05T11:58:40.432Z] [INFO]   ✅ PR body already contains issue reference
[2025-12-05T11:58:40.441Z] [INFO]   ✅ PR is already ready for review
[2025-12-05T11:58:40.446Z] [INFO] 
📎 Uploading solution draft log to Pull Request...
[2025-12-05T11:58:40.925Z] [INFO]   💰 Calculated cost: $2.742661