Add debug logging to backend SocketServer message processing

vidai/comm.py

@@ -153,6 +153,7 @@ class SocketServer:
                 messages = decoded.split('\n')
                 for msg_str in messages:
                     if msg_str.strip():
+                        print(f"DEBUG: SocketServer processing message: {repr(msg_str)}")
                         try:
                             msg_data = json.loads(msg_str)
                             message = Message(
@@ -160,6 +161,7 @@ class SocketServer:
                                 msg_id=msg_data['msg_id'],
                                 data=msg_data['data']
                             )
+                            print(f"DEBUG: SocketServer parsed message: {message}")
                             response = self.message_handler(message)
                             if response:
                                 resp_data = json.dumps({
@@ -168,7 +170,8 @@ class SocketServer:
                                     'data': response.data
                                 }).encode('utf-8')
                                 client_sock.sendall(resp_data + b'\n')
-                        except json.JSONDecodeError:
+                        except json.JSONDecodeError as e:
+                            print(f"DEBUG: SocketServer JSON decode error: {e}")
                             pass
         except:
             pass