Wire Qwen 2.1 as Generate-only engine with 25/1 sampler defaults.

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

components/studio2/Bench.vue

@@ -143,8 +143,10 @@
      <div class="mb-3 flex flex-wrap items-start justify-between gap-3">
       <h2 class="text-xs uppercase tracking-wider text-zinc-400">Source</h2>
       <div v-if="isStudio" class="flex flex-wrap gap-4 text-sm text-zinc-300" aria-label="Identity locks">
+       <template v-if="form.engine!=='qwen21'">
        <label class="flex items-start gap-2"><input v-model="form.lockFace" type="checkbox" class="mt-1 accent-amber-400"><span>Lock face<span class="block text-xs text-zinc-500">Hero encode + lock on Klein / Krea stills</span></span></label>
        <label class="flex items-start gap-2"><input v-model="form.lockOutfit" type="checkbox" class="mt-1 accent-amber-400"><span>Lock outfit<span class="block text-xs text-zinc-500">Hero encode + lock on Klein / Krea stills</span></span></label>
+       </template>
       </div>
      </div>
      <div class="flex flex-wrap gap-4">
@@ -206,6 +208,7 @@
      </details>
      <button type="button" class="text-sm text-amber-200 outline-none ring-amber-300/40 focus-visible:ring-2" @click="settingsOpen=true">Generation settings</button>
      <p v-if="!video && form.engine==='krea'" class="text-sm text-zinc-400">Krea does not attach the hero identity reference.</p>
+     <p v-if="!video && form.engine==='qwen21'" class="text-sm text-zinc-400">Qwen 2.1 is T2I — no hero, locks, or LoRA stack in this build.</p>
      <p v-if="form.mode==='extend'" class="text-sm text-amber-200">{{ form.startClipId ? 'Extend · '+(clips.find((c:any)=>c.id===form.startClipId)?.name || form.startClipId)+' · last frame' : 'Select the clip in the family strip or Previous clip.' }}</p>
     </template>
 
@@ -249,8 +252,10 @@
      </label>
      <button type="button" class="mb-4 text-sm text-amber-200 outline-none ring-amber-300/40 focus-visible:ring-2" @click="form.settings.seedMode='random';form.settings.seed=randomSeed()">Random</button>
      <label v-if="video"><input v-model="form.settings.turbo" type="checkbox" class="accent-amber-400"> Turbo</label>
+     <template v-if="form.engine!=='qwen21'">
      <LoraSelect v-model="form.settings.loraStack" class="mt-5" :names="pickerLoras" :use="currentLoraUse" :clip-strength="!video" filename-subtitle :aliases="{...loraNames.aliases,...library.loraAliases}" :triggers="{...loraNames.triggers,...library.loraTriggers}" missing-label="No cached LoRAs yet — Refresh to check Comfy" @insert-trigger="form.promptSections.action += ' '+$event" />
      <button type="button" class="mt-2 text-sm text-amber-200 outline-none ring-amber-300/40 focus-visible:ring-2" @click="loadLoras(true)">Refresh LoRAs</button>
+     </template>
      <details class="mt-6"><summary>Compiled prompt</summary>
       <pre class="whitespace-pre-wrap text-xs text-zinc-400">{{ compiled }}</pre>
       <p v-if="!video" class="mt-3 text-xs text-zinc-400">Negative: {{ stylePrompt(form.imageStyles,true) || 'None' }}</p>
@@ -316,6 +321,7 @@ const tasks=['generate','edit','compose','refine','video','extend','music']
 const settingsOpen=ref(false),detailsOpen=ref(false),submitting=ref(false),error=ref(''),batchText=ref('')
 const video=computed(()=>['video','extend'].includes(form.mode))
 const kreaSticky=computed(()=>['edit','compose','iterate'].includes(form.mode))
+const qwenOnlyGenerate=computed(()=>form.mode!=='generate')
 const engineOptions=computed(()=>{
  if(video.value){
   return [
@@ -325,13 +331,23 @@ const engineOptions=computed(()=>{
  }
  return [
   {value:'flux',label:'Klein',disabled:false,hint:''},
-  {value:'krea',label:'Krea 2',disabled:kreaSticky.value,hint:kreaSticky.value?'sticky hero = Klein':''}
+  {value:'krea',label:'Krea 2',disabled:kreaSticky.value,hint:kreaSticky.value?'sticky hero = Klein':''},
+  {value:'qwen21',label:'Qwen 2.1',disabled:qwenOnlyGenerate.value,hint:qwenOnlyGenerate.value?'Qwen 2.1 is T2I in this build':''}
  ]
 })
 watch(engineOptions,opts=>{
  const current=opts.find(o=>o.value===form.engine)
  if(!current || current.disabled)form.engine=opts.find(o=>!o.disabled)?.value || form.engine
 })
+watch(()=>form.engine,(engine,prev)=>{
+ if(engine==='qwen21' && prev!=='qwen21'){
+  form.settings.steps=25
+  form.settings.cfg=1
+  form.lockFace=false
+  form.lockOutfit=false
+  form.settings.loraStack=[]
+ }
+})
 const stills=computed(()=>library.value.stills.filter((s:any)=>s.folderId===form.folderId))
 const clips=computed(()=>library.value.clips.filter((s:any)=>s.folderId===form.folderId))
 const compiled=computed(()=>compilePrompt(form.promptSections,video.value,form))
@@ -348,7 +364,7 @@ const inputStill=computed(()=>stills.value.find((s:any)=>s.id===form.imageAId))
 const family=computed(()=>folderAssets(library.value,jobs.value,form.folderId))
 const sourceAsset=computed(()=>form.startClipId?clips.value.find((c:any)=>c.id===form.startClipId):stills.value.find((s:any)=>s.id===(form.imageAId||form.identityStillId)))
 const sourceSize=computed(()=>measured[sourceAsset.value?.id] || sourceAsset.value)
-const resolvedSize=computed(()=>resolveSize(form.settings.aspect,sourceSize.value))
+const resolvedSize=computed(()=>resolveSize(form.settings.aspect,sourceSize.value,undefined,form.engine))
 
 function isHidden(asset:any){
  if(!xaigen || !asset?.id)return false