code.gs

const CONFIG = {
  sheet_Retirement: "Retirement Plan",
  sheet_Spends: "Statement - Spends",
  sheet_Investment: "Investments",
  sheet_Assets: "Assets",
  sheet_Goals: "Savings Goals",
  sheet_Budget: "Budget & Expense",
  timezone: Session.getScriptTimeZone()
};

// ==========================================
// ROUTING
// ==========================================
function doGet(e) {
  const route = (e && e.parameter && e.parameter.page) ? e.parameter.page : 'exchangerate';

  switch (route) {
    case 'dashboard':
      return db_loadDashboard();
    case 'exchangerate':
      return ex_loadExchangeRatePage();
    case 'widgyhome':
      return api_getWidgyHome();
    case 'dash':
      return mock_loadDashboard();
    default:
      return HtmlService.createHtmlOutput("<h3>Page not found.</h3>");
  }
}

// ==========================================
// HTML TEMPLATE HELPER
// ==========================================
function include(filename) {
  return HtmlService.createHtmlOutputFromFile(filename).getContent();
}