Move timeline and preview gestures into dedicated controllers so hooks stay thin around editor state and DOM events.
This also routes drag and playback synchronization through manager APIs and reuses persistent wasm surfaces so scrubbing, seeking, and preview rendering stay in sync.
Made-with: Cursor
Introduce `bridge` proc-macro crate with `#[export]` attribute that conditionally applies `wasm_bindgen` for WASM builds, and `time` crate porting all timecode/frame utilities from TypeScript to Rust.