- manifest.json + icon.svg for installability on mobile (standalone mode)
- index.html: theme-color, apple-mobile-web-app meta tags, manifest link
- Settings: Import CSV section reads Google Takeout subscriptions.csv,
extracts UC... channel IDs, calls follow-bulk to follow them all at once
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
