Implement timeline chapters for webinar and bootcamp videos with click-to-jump functionality:
**Components:**
- VideoPlayerWithChapters: Plyr.io-based player with chapter support
- TimelineChapters: Clickable chapter markers with active state
- ChaptersEditor: Admin UI for managing video chapters
**Features:**
- YouTube videos: Clickable timestamps that jump to specific time
- Embed videos: Static timeline display (non-clickable)
- Real-time chapter tracking during playback
- Admin-defined accent color for Plyr theme
- Auto-hides timeline when no chapters configured
**Database:**
- Add chapters JSONB column to products table (webinars)
- Add chapters JSONB column to bootcamp_lessons table
- Create indexes for faster queries
**Updated Pages:**
- WebinarRecording: Two-column layout (video + timeline)
- Bootcamp: Per-lesson chapter support
- AdminProducts: Chapter editor for webinars
- CurriculumEditor: Chapter editor for lessons
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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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