Allow Studio 2 MiniMax text-to-video with empty start when locks are off.

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

tests/studio2-controls.test.mjs

@@ -36,6 +36,17 @@ test('appearance roles distinguish wardrobe lock and both-off graph excludes her
  const graph=nativeVideoGraph(template,r,{hero:'ignored.png',start:'start.png'},'preview')
  assert.equal(graph.hero,undefined);assert.equal(graph['155'].inputs['ref_images.ref_image_0'],undefined);assert.equal(graph.load_start.inputs.image,'start.png');assert.equal(r.identityStillId,'hero')
 })
+test('video with locks off and no assets is MiniMax T2V empty first frame',()=>{
+ const r=validateRequest({mode:'video',engine:'minimax',folderId:'f',lockFace:false,lockOutfit:false,identityStillId:'',imageAId:'',promptSections:{action:'Wide empty street at dawn'}})
+ assert.equal(r.lockFace,false);assert.equal(r.lockOutfit,false);assert.equal(r.imageAId,'');assert.equal(r.startClipId,'')
+ const template=JSON.parse(fs.readFileSync(new URL('../server/assets/studio2_minimax_native.json',import.meta.url)))
+ const graph=nativeVideoGraph(template,r,{hero:'',start:''},'preview/t2v')
+ assert.equal(graph['155'].class_type,'MiniMaxH3ImageToVideo')
+ assert.equal(graph['155'].inputs.first_frame,undefined)
+ assert.equal(graph.load_start,undefined)
+ assert.equal(graph.hero,undefined)
+ assert.throws(()=>validateRequest({mode:'extend',engine:'minimax',folderId:'f',lockFace:false,lockOutfit:false,promptSections:{action:'Continue'}}),e=>/Previous clip|family strip/i.test(e.message))
+})
 test('sound/dialogue/music compile without empty invented audio',()=>{
  const empty=compilePrompt({},true);assert.doesNotMatch(empty,/Soundscape:|<d>/);assert.match(empty,/non_diegetic_music: N\/A/)
  const text=compilePrompt({soundscapeChips:['footsteps'],dialogue:{mode:'spoken off-screen',line:'Hello'}},true);assert.match(text,/lips remain closed/);assert.match(text,/<Subject 1> \(S1\) says <d>\[English\]Hello<\/d>/)