feat(device): TX/RX 日志附加完整 JSON 字符串

lib/features/device/services/device_message_service.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 import 'dart:typed_data';
 
 import 'serial_port_service.dart';
+import 'device_log.dart';
 import 'device_message.dart';
 import 'json_protocol.dart';
 
@@ -77,10 +78,18 @@ class DeviceMessageService {
         _emitError('写入失败：${message.type.wireName}');
         return false;
       }
+      DeviceLog.info(
+        'TX ${message.type.wireName} '
+        'id=${message.messageId} '
+        'ack=${message.ack ?? "-"} '
+        'needAck=${message.needAck} '
+        'data=${DeviceLog.summarizeData(message.data)}\n'
+        '   json=${message.encode()}',
+      );
       _messageCtrl.add(message);
       return true;
     } catch (e) {
-      _emitError('编码异常: $e');
+      _emitError('编码异常: $e', error: e);
       return false;
     }
   }
@@ -104,7 +113,7 @@ class DeviceMessageService {
     _stateSub?.cancel();
 
     _rxSub = _serial.onData.listen(_onData);
-    _errorSub = _serial.onError.listen(_emitError);
+    _errorSub = _serial.onError.listen((msg) => _emitError(msg));
     _stateSub = _serial.connectionStateChanges.listen((s) {
       if (s == SerialConnectionState.disconnected) {
         _protocol.reset();
@@ -129,6 +138,13 @@ class DeviceMessageService {
   }
 
   void _dispatch(DeviceMessage msg) {
+    DeviceLog.info(
+      'RX ${msg.type.wireName} '
+      'id=${msg.messageId} '
+      'ack=${msg.ack ?? "-"} '
+      'data=${DeviceLog.summarizeData(msg.data)}\n'
+      '   json=${msg.encode()}',
+    );
     _messageCtrl.add(msg);
     final list = _handlers[msg.type];
     if (list == null) return;
@@ -136,12 +152,18 @@ class DeviceMessageService {
       try {
         handler(msg);
       } catch (e) {
-        _emitError('消息处理异常 (${msg.type.wireName}): $e');
+        _emitError('消息处理异常 (${msg.type.wireName}): $e', error: e);
+        DeviceLog.severe('消息处理异常 (${msg.type.wireName})', error: e);
       }
     }
   }
 
-  void _emitError(String message) {
+  void _emitError(String message, {Object? error}) {
+    if (error != null) {
+      DeviceLog.warn(message, error: error);
+    } else {
+      DeviceLog.warn(message);
+    }
     if (!_errorCtrl.isClosed) _errorCtrl.add(message);
   }
 }