Add server: Express web UI + API for remote audio description generation with job queue, basic auth, resumable processing, subtitles, and muxing

src/interfaces/index.ts

@@ -81,10 +81,28 @@ export interface BatchContext {
   lastFramePaths?: string[];
 }
 
+// Progress callback for real-time tracking
+export interface ProgressInfo {
+  type: 'frame' | 'batch';
+  index: number;
+  total: number;
+  segment: AudioSegment;
+}
+
+// Extended processing options for resumability
+export interface ProcessingOptions {
+  startIndex?: number;
+  existingSegments?: AudioSegment[];
+  lastContext?: BatchContext;
+  currentTimePosition?: number;
+  onProgress?: (info: ProgressInfo) => void;
+}
+
 // Result interfaces
 export interface ProcessingResult {
   videoFile: string;
   audioDescriptionFile: string;
+  segments: AudioSegment[];
 }
 
 export interface CostBreakdown {