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

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

tests/studio2-bench.test.mjs

@@ -74,3 +74,10 @@ test('image chips compile positive and negative independently; video chips do no
  assert.doesNotMatch(compilePrompt(q.promptSections,false,q),/Picture 1/)
  assert.deepEqual(parseBatch('A wrapped\nsentence\n\nSecond shot\r\n\r\nThird'),['A wrapped\nsentence','Second shot','Third'])
 })
+test('qwen21 is generate-only T2I with 25/1 defaults and no locks',()=>{
+ const q=validateRequest({mode:'generate',engine:'qwen21',folderId:'f',promptSections:{action:'a red bicycle'},settings:{aspect:'1:1'}})
+ assert.equal(q.engine,'qwen21');assert.equal(q.settings.steps,25);assert.equal(q.settings.cfg,1)
+ assert.equal(q.settings.width,1024);assert.equal(q.settings.height,1024)
+ assert.equal(q.lockFace,false);assert.equal(q.lockOutfit,false);assert.deepEqual(q.settings.loraStack,[])
+ assert.throws(()=>validateRequest({mode:'edit',engine:'qwen21',folderId:'f',imageAId:'s',promptSections:{action:'x'}}),/T2I in this build/)
+})