添加 IMU 节点时间戳，优化日志

src/uart_transmitter_node.cpp

@@ -252,7 +252,7 @@ private:
       snprintf(buf, sizeof(buf), "%02X ", frame[i]);
       frame_hex += buf;
     }
-    RCLCPP_INFO(this->get_logger(), "[发包](%d字节): %s", FRAME_LENGTH,
+    RCLCPP_INFO(this->get_logger(), "[TX](%dB): %s", FRAME_LENGTH,
                 frame_hex.c_str());
 
     // 发送数据
@@ -321,7 +321,7 @@ private:
 
                   // 输出详细日志
                   RCLCPP_INFO(this->get_logger(),
-                              "[收包]: %02X %02X | x:%d y:%d yaw:%d "
+                              "[RX]: %02X %02X | x:%d y:%d yaw:%d "
                               "pitch:%d feed:%d | L:%d R:%d | CRC:%02X | %02X",
                               frame_buffer[0], frame_buffer[1], x_move, y_move,
                               yaw, pitch, feed, left_switch, right_switch,