Keep queued extension chains running after refresh instead of saving the first clip as final.

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

server/utils/jobs.ts

@@ -67,6 +67,8 @@ export interface Job {
     stillId?: string
     stillFilename?: string
     referenceImageNames?: string[]
+    referenceStillIds?: Array<string | null>
+    useIdentityRefs?: boolean
     duration?: number
     sound?: boolean
     draftId?: string
@@ -81,6 +83,7 @@ export interface Job {
     familyId?: string
     parentClipId?: string
     workflow?: 'v1' | 'v2'
+    chainContinuing?: boolean
   }
   error?: string
   socketReady?: boolean