lil fix + add flush queue feat

src/app/video-processing.service.ts

@@ -34,4 +34,8 @@ export class VideoProcessingService {
   downloadFile(filePath: string): Observable<Blob> {
     return this.http.get(`${this.apiUrl}/download/${filePath}`, { responseType: 'blob' });
   }
+
+  flushQueue(): Observable<any> {
+    return this.http.delete<any>(`${this.apiUrl}/jobs/completed`, {});
+  }
 }