Join pre/prompt/post into the first MiniMax prompt, not only later shots.

The motion prompt field is what Comfy actually runs. Wrappers are now composed into that string on submit, and shot 1 falls back to it if the separate pre/post fields do not arrive.

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

server/utils/imageChainV2.ts

@@ -8,7 +8,7 @@ import { imageDimensions } from '~/server/utils/resolution'
 import { emitChainJob } from '~/server/utils/watch'
 import { saveStill, stillChainName } from '~/server/utils/library'
 import { comfyJobPrefix } from '~/utils/outputNames'
-import { joinPromptParts } from '~/utils/promptParts'
+import { restorePromptParts, wrappedPromptForComfy } from '~/utils/promptParts'
 import { isXaigenStudio } from '~/utils/videoModels'
 import {
   imageV2StackSpecials,
@@ -69,7 +69,14 @@ export async function runEditV2(job: Job, params: EditV2RunParams) {
   const extraPasses = canChain
     ? (params.passes || []).map(item => ({ prompt: String(item.prompt || '').trim() })).filter(item => item.prompt)
     : []
-  const prompts = [params.prompt, ...extraPasses.map(item => item.prompt)]
+  const prompts = [
+    library.promptMid || restorePromptParts(params.prompt, {
+      pre: library.promptPre,
+      prompt: params.prompt,
+      post: library.promptPost
+    }).prompt,
+    ...extraPasses.map(item => item.prompt)
+  ]
   const chainTotal = prompts.length
   const batch = params.passMode !== 'chain'
   const unit = batch ? 'Batch' : 'Pass'
@@ -218,7 +225,7 @@ export async function runEditV2(job: Job, params: EditV2RunParams) {
           mode: params.mode,
           engine,
           task: params.task,
-          prompt: joinPromptParts(library.promptPre, prompt, library.promptPost),
+          prompt: wrappedPromptForComfy(library, prompt, index === 0 ? params.prompt : prompt),
           negative: params.negative,
           imageAName: uploaded?.name,
           imageBName: uploadedRef?.name,