BREAKING CHANGE(recorder): Remove FFmpeg-based MP4 conversion; simplify recorder/export to WebM and improve recorder/editor robustness

ts_web/services/recorder.service.ts

@@ -235,9 +235,11 @@ export class RecorderService {
     }
   }
 
-  private handleRecordingComplete(): void {
+  private async handleRecordingComplete(): Promise<void> {
     // Create blob from recorded chunks
-    this._recordedBlob = new Blob(this.recordedChunks, { type: 'video/webm' });
+    const blob = new Blob(this.recordedChunks, { type: 'video/webm' });
+
+    this._recordedBlob = blob;
 
     // Stop all tracks
     if (this.currentStream) {