Ship extension queues, library extend, and smoother seam stitching.

Users can pre-queue extensions, extend from the library with p2 titles, blend seams with xfade, and a unreadable catalog is no longer replaced with an empty one.

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

server/utils/jobs.ts

@@ -20,6 +20,9 @@ export interface JobEvent {
   folderLocked?: boolean
   jobId?: string
   draftId?: string
+  chainStep?: number
+  chainTotal?: number
+  chainLabel?: string
 }
 
 export interface Job {
@@ -61,12 +64,18 @@ export interface Job {
     duration?: number
     sound?: boolean
     draftId?: string
+    extensions?: { prompt: string; duration: number }[]
+    chainIndex?: number
+    chainStep?: number
+    chainTotal?: number
+    chainLabel?: string
     extendTmpDir?: string
     extendPart1Path?: string
     extendSourceClipId?: string
   }
   error?: string
   socketReady?: boolean
+  segmentBuffer?: Buffer
   events: JobEvent[]
   listeners: Set<(event: JobEvent) => void>
 }
@@ -121,7 +130,10 @@ export function jobSnapshot(job: Job) {
     hideThumbnail: job.hideThumbnail,
     error: job.error,
     folderLocked: job.library?.folderLocked,
-    draftId: job.library?.draftId
+    draftId: job.library?.draftId,
+    chainStep: job.library?.chainStep,
+    chainTotal: job.library?.chainTotal,
+    chainLabel: job.library?.chainLabel
   }
 }
 
@@ -131,6 +143,13 @@ export function emitJob(job: Job, event: JobEvent) {
   if (typeof event.progress === 'number') job.progress = event.progress
   if (typeof event.step === 'number') job.step = event.step
   if (typeof event.maxStep === 'number') job.maxStep = event.maxStep
+  if (typeof event.chainStep === 'number') {
+    if (job.library) job.library.chainStep = event.chainStep
+  }
+  if (typeof event.chainTotal === 'number') {
+    if (job.library) job.library.chainTotal = event.chainTotal
+  }
+  if (event.chainLabel && job.library) job.library.chainLabel = event.chainLabel
   event.elapsedMs = Date.now() - job.startedAt
   job.events.push(event)
   if (job.events.length > 200) job.events.shift()