Added DAW Timeline and Multi-Camera Layouts
The editor got two major upgrades:
1. The timeline is now a proper DAW-style interface, and we added a full multi-camera layout system. Each track (source video, video inserts, audio inserts, per-speaker audio) gets its own row with the label and content side by side. A tool bar at the top gives you play/pause, timecode, cut controls, and zoom without scrolling around. The Media Library panel slides over from the right. Drag files from the library onto insert tracks to add intros, outros, music beds, or b-roll.
2. Multi-Camera Layouts. If your episode has multiple camera angles, you now have several options: single, side-by-side (horizontal or vertical), picture-in-picture, 2+1, and mobile (vertical stack for Shorts/Reels). Cut between layouts with the B key, cycle layout types with Shift+B, and swap camera slot assignments with Shift+1/2/3. Toggle Follow-Active-Speaker (FAS) with F. FAS reads the transcript, maps speakers to cameras, and auto-switches the active camera based on who's talking. Manual overrides take priority.