feat(device): TX/RX 日志附加完整 JSON 字符串

lib/features/device/services/serial_runner.dart

@@ -2,6 +2,7 @@ import 'dart:async';
 
 import '../../programs/models/program.dart';
 import '../../programs/models/step.dart';
+import 'device_log.dart';
 import 'device_message.dart';
 import 'device_message_service.dart';
 import 'runner_interface.dart';
@@ -65,6 +66,8 @@ class JsonSerialRunner implements Runner {
     final messageId = _msg.nextId();
     _pendingCreateTaskId = messageId;
     final msg = payload.toMessage(messageId, needAck: true);
+    DeviceLog.info('Runner.start: program="${program.name}" steps=${steps.length} '
+        'temperature=${program.temperature} airflow=${program.airflowTime}');
     _msg.send(msg).then((ok) {
       if (!ok) {
         _pendingCreateTaskId = null;
@@ -77,6 +80,7 @@ class JsonSerialRunner implements Runner {
   @override
   void pause() {
     if (status != RunnerStatus.running) return;
+    DeviceLog.info('Runner.pause');
     _sendControl('pause');
     _stopLocalTicker();
     status = RunnerStatus.paused;
@@ -85,6 +89,7 @@ class JsonSerialRunner implements Runner {
   @override
   void resume() {
     if (status != RunnerStatus.paused) return;
+    DeviceLog.info('Runner.resume');
     _sendControl('continue');
     status = RunnerStatus.running;
     _startLocalTicker();
@@ -93,6 +98,7 @@ class JsonSerialRunner implements Runner {
   @override
   void stop() {
     if (status == RunnerStatus.idle) return;
+    DeviceLog.info('Runner.stop');
     _sendControl('stop');
     _teardown();
     status = RunnerStatus.idle;
@@ -125,6 +131,7 @@ class JsonSerialRunner implements Runner {
   void _onCreateTaskAck(DeviceMessage ack) {
     if (ack.ack != _pendingCreateTaskId) return;
     _pendingCreateTaskId = null;
+    DeviceLog.info('Runner received create_task ack: id=${ack.messageId}');
     // ack 即视为下位机已接受任务，进入 running 状态
     if (status == RunnerStatus.idle || status == RunnerStatus.error) {
       status = RunnerStatus.running;
@@ -135,6 +142,7 @@ class JsonSerialRunner implements Runner {
   void _onControlAck(DeviceMessage ack) {
     if (ack.ack != _pendingControlId) return;
     _pendingControlId = null;
+    DeviceLog.info('Runner received control ack: id=${ack.messageId}');
     // control ack 不修改状态，状态机在调用 pause/resume/stop 时已切过
   }
 
@@ -149,6 +157,7 @@ class JsonSerialRunner implements Runner {
       if (_remainingSeconds <= 0) {
         _currentStepIndex++;
         if (_currentStepIndex >= _steps.length) {
+          DeviceLog.info('Runner 本地倒计时完成 (timeout fallback)');
           _stopLocalTicker();
           status = RunnerStatus.completed;
           _callbacks?.onComplete?.call();