Add Krea as a second Image v2 Generate engine beside Flux.

Generate can queue krea_v2_generate.json without sharing Klein encoders or falling back if Krea assets are missing.

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

server/utils/studioQueue.ts

@@ -54,6 +54,7 @@ export interface StudioJobPayload {
   imagePipeline?: 'v1' | 'v2'
   v2Mode?: 'edit' | 'compose' | 'refine' | 'generate'
   v2Task?: 'scene' | 'identity' | 'outfit' | 'face_lock' | 'refine' | 't2i'
+  engine?: 'flux' | 'krea'
   snofsModel?: number
   snofsClip?: number
   consistencyModel?: number
@@ -753,6 +754,7 @@ async function startStudioEditJob(item: StudioJob) {
       await markStudioLive(item.ownerKey, item.id, live.id)
       void runEditV2(live, {
         mode,
+        engine: mode === 'generate' && payload.engine === 'krea' ? 'krea' : 'flux',
         task: payload.v2Task || 'scene',
         image: mode === 'generate' ? null : image,
         reference: mode === 'refine' || mode === 'generate' ? null : reference,