Add Studio 2 caption jobs via Qwen2.5-VL GGUF on the host agent.

Exclusive llama-server load/unload on the 5080, queued Describe UI with resultText, Copy, and Use as prompt.

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

server/utils/jobs.ts

@@ -36,9 +36,11 @@ export interface Job {
   upscale?: boolean
   yueGp?: boolean
   yue2?: boolean
+  caption?: boolean
+  resultText?: string
   musicActivity?: { checkedAt: number; running: boolean }
   id: string
-  kind?: 'video' | 'edit' | 'music'
+  kind?: 'video' | 'edit' | 'music' | 'caption'
   promptId?: string
   clientId: string
   status: JobStatus