Wire Qwen Edit Start still to image_1 and PE-I2I identity keep.

Edit no longer invents strangers when the prompt omits <image1> or PE drops image tokens; Hero stays Klein-only.

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

components/studio2/Bench.vue

@@ -109,7 +109,7 @@
        <label class="inline-flex items-center gap-2"><input v-model="form.lockOutfit" type="checkbox" class="accent-[var(--amber)]">Lock outfit</label>
        <p class="text-[11px]">hero encode + lock text — not a MiniMax face/clothes split on stills</p>
       </div>
-      <p v-else-if="form.mode==='edit'" class="text-[var(--type-sm)] text-[var(--muted)]">Qwen edit uses source as &lt;image1&gt;, not Klein hero-ref. No locks or LoRA stack.</p>
+      <p v-else-if="form.mode==='edit'" class="text-[var(--type-sm)] text-[var(--muted)]">Qwen Edit uses Start still as &lt;image1&gt;. Hero is Klein-only and is ignored.</p>
       <p v-else class="text-[var(--type-sm)] text-[var(--muted)]">Qwen 2.1 — no hero, locks, or LoRA stack.</p>
 
       <label>
@@ -521,7 +521,7 @@ const editSourceRequired=computed(()=>['edit','compose','refine'].includes(form.
 const heroSlotLabel=computed(()=>editSourceRequired.value?'Identity / reference':'Hero still')
 const sourceSlotLabel=computed(()=>{
  if(form.mode==='extend')return 'Previous clip'
- if(editSourceRequired.value)return 'Edit source'
+ if(editSourceRequired.value)return form.engine==='qwen21'?'Start still':'Edit source'
  return 'Start still'
 })
 const slotPairHint=computed(()=>{
@@ -529,7 +529,7 @@ const slotPairHint=computed(()=>{
   ? 'Krea Refine: Edit source is the picture; Mask is the refine region.'
   : 'Refine: Edit source is the picture; Mask marks the region to change.'
  if(!editSourceRequired.value)return ''
- if(form.engine==='qwen21')return 'Qwen: Edit source is <image1>. Hero is unused unless the graph maps it to <image2>.'
+ if(form.engine==='qwen21')return 'Qwen Edit uses Start still as <image1>. Hero is Klein-only and is ignored.'
  return 'Klein: Hero = identity encode. Edit source = the picture you are changing.'
 })
 const queueCards=computed(()=>{