Fix syntax error in TTS stage and complete pipeline

app.py

@@ -380,8 +380,18 @@ try:
         TTS_MODEL.load_state_dict(state["state_dict"])
     else:
         TTS_MODEL.load_state_dict(state) # Assume the whole file is the state_dict
+    
     TTS_MODEL.eval()
     
+    # Set all submodules to eval mode and disable gradients permanently
+    for module in TTS_MODEL.modules():
+        if hasattr(module, 'training'):
+            module.train(False)
+    
+    # Disable gradients for all parameters permanently
+    for param in TTS_MODEL.parameters():
+        param.requires_grad = False
+    
     # Try torch.compile for additional speedup (PyTorch 2.0+)
     try:
         TTS_MODEL = torch.compile(TTS_MODEL, mode="reduce-overhead")
@@ -389,10 +399,7 @@ try:
     except Exception as compile_error:
         print(f"Torch compile not available: {compile_error}, using standard model.")
     
-    print("TTS model loaded successfully.")
-except Exception as e:
-    print(f"Error loading TTS model: {e}")
-    TTS_MODEL = None
+    print("TTS model loaded successfully (optimized for inference).")
 
 # Load STT (Whisper) Model from Hub
 try: