Generic Platform:
- New 'generic' platform type — catch-all for any URL yt-dlp supports
- GenericSource resolves channel metadata from any URL via yt-dlp extractors
- Content type auto-detection (video/audio/livestream) from yt-dlp metadata
- Works with Vimeo, Twitch, Bandcamp, Dailymotion, and 1000+ other sites
- Registered in both scheduler registry and channel route registry
- Frontend: indigo badge, URL detection fallback, AddChannelModal support
YouTube Enhancements:
- embedChapters: --embed-chapters flag on FormatProfile
- embedThumbnail: --embed-thumbnail flag on FormatProfile
- sponsorBlockRemove: --sponsorblock-remove with configurable categories
(sponsor, selfpromo, interaction, intro, outro, preview, music_offtopic, filler)
- Migration 0011: adds columns to format_profiles table
- All three configurable per format profile via API and (future) Settings UI
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