feat(anki): add waveform-guided timing controls

- Add speech-weighted waveform analysis and playback playhead
- Support dragging, sliding, and keyboard nudging for clip timing

src/types/anki.ts

@@ -49,6 +49,16 @@ export interface MediaTimingReviewPreviewRequest {
   endTime: number;
 }
 
+export interface MediaTimingReviewWaveformRequest {
+  reviewId: string;
+  startTime: number;
+  endTime: number;
+}
+
+export interface MediaTimingReviewWaveformResult extends MediaTimingReviewActionResult {
+  peaks?: number[];
+}
+
 export interface MediaTimingReviewResolveRequest {
   reviewId: string;
   decision: MediaTimingReviewDecision;