修复模型权重检查路径

backend/app/services/lipsync_service.py

@@ -38,9 +38,9 @@ class LipSyncService:
             return self._weights_available
         
         required_dirs = [
-            self.musetalk_dir / "models" / "musetalkV15",
+            # huggingface-cli 下载后的嵌套结构
+            self.musetalk_dir / "models" / "musetalk" / "musetalkV15",
             self.musetalk_dir / "models" / "whisper",
-            self.musetalk_dir / "models" / "sd-vae-ft-mse",
         ]
         
         self._weights_available = all(d.exists() for d in required_dirs)