Integrate YuE2 as an exclusive Athena mode

dev/test_dashboard_modes.py

@@ -80,6 +80,13 @@ class DashboardModeTests(unittest.TestCase):
         self.assertEqual(body, {"status": "accepted"})
         self.assertEqual(json.loads(urlopen.call_args.args[0].data), {"mode": "applio"})
 
+    def test_yue2_mode_is_forwarded_to_router(self):
+        with patch.object(self.dashboard.urllib.request, "urlopen", return_value=_Response()) as urlopen:
+            status, body = self.dashboard.change_mode("yue2")
+        self.assertEqual(status, 202)
+        self.assertEqual(body, {"status": "accepted"})
+        self.assertEqual(json.loads(urlopen.call_args.args[0].data), {"mode": "yue2"})
+
     def test_unknown_mode_is_rejected_without_router_request(self):
         with patch.object(self.dashboard.urllib.request, "urlopen") as urlopen:
             status, body = self.dashboard.change_mode("unknown")
@@ -104,6 +111,15 @@ class DashboardModeTests(unittest.TestCase):
         self.assertIn("http://192.168.1.212:8011/", html)
         self.assertIn("http://192.168.1.212:8012/", html)
 
+    def test_dashboard_keeps_ace_step_and_offers_yue2_separately(self):
+        html = self.dashboard.HTML
+
+        self.assertIn("ACE-Step Studio", html)
+        self.assertIn("YuE2 Studio", html)
+        self.assertIn("setMode('music')", html)
+        self.assertIn("setMode('yue2')", html)
+        self.assertIn("http://192.168.1.212:8014/", html)
+
     def test_dashboard_lists_only_portable_encrypted_backups(self):
         valid = self.backup_dir / "athena-portable-2026-09-10T10-00-00Z.tar.zst.age"
         valid.write_bytes(b"encrypted")