Add MiniMax and PinkCherry LTX as pickable video engines, with still or text start.

Shot 1 can run text-to-video; later shots still extend from the last frame. Recommend output is also normalized into shot-script cards.

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

server/utils/shotQueue.ts

@@ -38,7 +38,7 @@ export interface ShotQueue {
   fps?: number
   samplerName?: string
   scheduler?: string
-  workflow?: 'v1' | 'v2'
+  workflow?: import('~/utils/videoModels').VideoWorkflowId
   sound?: boolean
   useIdentityRefs?: boolean
   referenceStillIds?: Array<string | null>
@@ -153,7 +153,7 @@ export async function createShotQueue(params: {
   fps?: number
   samplerName?: string
   scheduler?: string
-  workflow?: 'v1' | 'v2'
+  workflow?: import('~/utils/videoModels').VideoWorkflowId
   sound?: boolean
   useIdentityRefs?: boolean
   referenceStillIds?: Array<string | null>