Summary

This PR implements update channel support for CortexIDE's update system, enhancing the existing custom update service with channel-based GitHub API checks.

Changes

Core Features

• ✅ Add update.updateChannel configuration setting (stable/beta/nightly)
• ✅ Enhance CortexideMainUpdateService with channel-based GitHub API checks
• ✅ Replace fetch() with IRequestService for cross-platform compatibility
• ✅ Support channel selection in standard VS Code update services
• ✅ Fix hardcoded URLs (voideditor.com → opencortexide.com)
• ✅ Update Linux update service to use channel parameter
• ✅ Ensure truthful UX for Linux (no fake auto-updates)

Files Modified

• src/vs/platform/update/common/update.config.contribution.ts - Added channel config
• src/vs/platform/update/electron-main/abstractUpdateService.ts - Channel support
• src/vs/platform/update/electron-main/updateService.*.ts - Platform-specific channel support
• src/vs/workbench/contrib/cortexide/electron-main/cortexideUpdateMainService.ts - Enhanced with channel support
• src/vs/workbench/contrib/cortexide/browser/cortexideUpdateActions.ts - Fixed URLs and indentation
• src/vs/workbench/contrib/update/browser/update.*.ts - Channel switcher UI

Implementation Details

Channel Support

• Stable: Uses /releases/latest endpoint (non-prerelease only)
• Beta/Nightly: Uses /releases?per_page=1 endpoint (includes prereleases)
• Channel is read from update.updateChannel config setting
• Defaults to stable if not set (backward compatible)

Cross-Platform Compatibility

• Uses IRequestService instead of fetch() for proper HTTP handling
• Works on Windows, macOS, and Linux
• Respects proxy settings and network configuration
• Handles all Linux packaging formats (deb/rpm/AppImage/Snap)

Linux-Specific Behavior

• Snap packages: Auto-updates via system package manager
• Other formats: Shows "Update available" → opens download page (truthful UX)

Testing

• Code compiles without errors
• No dead code or unused imports
• Indentation fixed (tabs, not spaces)
• Works on all platforms (Windows, macOS, Linux)

Notes

• This is Option A implementation: Enhanced custom service with channel support
• Maintains backward compatibility with existing update flow
• No breaking changes to existing functionality