feat: add waveform generation and timeline display

Co-authored-by: Cursor <cursoragent@cursor.com>

src/lib/bindings/mediaAnalysis.ts

@@ -13,3 +13,10 @@ export interface ThumbnailSpritesheet {
 export async function extractKeyframes(filePath: string): Promise<number[]> {
   return invoke<number[]>('extract_keyframes', { filePath });
 }
+
+export async function extractWaveform(
+  filePath: string,
+  sampleCount: number
+): Promise<number[]> {
+  return invoke<number[]>('extract_waveform', { filePath, sampleCount });
+}