Keep YuE2 jobs live on the bench and wire target length to semantic tokens.

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

tests/studio2-status-playback.test.mjs

@@ -10,6 +10,8 @@ test('waiting records never replace the idle GPU status after completion',()=>{
  assert.deepEqual(gpuStatus([waiting,{...running,state:'complete'}],health),{label:'Ready',tone:'ready',detail:'No job running'});
  assert.equal(gpuStatus([waiting],health,[{status:'running',name:'Upscale current clip'}]).label,'Upscaling');
  assert.equal(gpuStatus([waiting],{comfy:{asleep:true}}).label,'Sleeping');
+ assert.equal(gpuStatus([waiting],{comfy:{asleep:true},yue2:{busy:true}}).label,'Generating');
+ assert.equal(gpuStatus([waiting],{comfy:{asleep:true}},[],[{status:'running',name:'song',live:{message:'Planning'}}]).label,'Generating');
 });
 test('Unicode video titles produce valid response headers and retain UTF-8 filename',()=>{
  for(const title of ['A scene… “hello” — 🎥.mp4','日本語.mp4','bad\r\nheader".mp4']){

tests/test_yue2_worker.py

@@ -32,6 +32,12 @@ class WorkerTests(unittest.TestCase):
         self.assertNotEqual(attention, 'flash')
         self.assertTrue(os.environ.get('PYTORCH_CUDA_ALLOC_CONF', '').startswith('expandable_segments'))
 
+    def test_target_length_maps_to_semantic_max_tokens(self):
+        # 48000 / 1920 = 25 latent frames per second.
+        self.assertEqual(max(200, min(9000, 30 * 25)), 750)
+        self.assertEqual(max(200, min(9000, 15 * 25)), 375)
+        self.assertEqual(max(200, min(9000, 150 * 25)), 3750)
+
     def test_cuda_oom_detection(self):
         self.assertTrue(worker.is_cuda_oom(RuntimeError('CUDA out of memory. Tried to allocate 2.49 GiB')))
         self.assertFalse(worker.is_cuda_oom(RuntimeError('bad lyrics')))

tests/yue2.test.mjs

@@ -18,7 +18,8 @@ test('YuE2 defaults are 60 seconds and allow multiple lyric sections', () => {
     '[Verse]\nA\n[Chorus]\nB'
   )
   assert.throws(() => validateYue2Request({ ...request, lyrics: '' }))
-  assert.throws(() => validateYue2Request({ ...request, duration: 20 }))
+  assert.throws(() => validateYue2Request({ ...request, duration: 10 }))
+  assert.deepEqual(validateYue2Request({ ...request, duration: 15 }).duration, 15)
   assert.throws(() => validateYue2Request({ ...request, id: '../escape' }))
 })