feat(home): 更新完成页面UI并优化串口连接状态管理

- 更新设备屏幕尺寸配置从1920*1080调整为1024x600
- 添加完成页面的AppBar导航和返回功能
- 重构CompletePage布局，使用SafeArea和ConstrainedBox适配不同屏幕
- 添加国际化支持的完成按钮文本
- 优化完成页面视觉元素，包括图标大小和间距调整
- 实现串口连接状态的响应式管理，解决UI状态同步问题
- 优化串口运行器的状态更新逻辑，实现乐观更新机制
- 调整完成页面按钮布局，提供完成和重新运行选项

AGENTS.md

@@ -163,4 +163,4 @@ AppLocalizations 支持中文(zh)和英文(en)，使用 `AppLocalizations.of(con
 ## 其他说明
 
 1. 需求文档：[已确认-污水毒品快检一体机_功能需求文档.md](docs/%E5%B7%B2%E7%A1%AE%E8%AE%A4-%E6%B1%A1%E6%B0%B4%E6%AF%92%E5%93%81%E5%BF%AB%E6%A3%80%E4%B8%80%E4%BD%93%E6%9C%BA_%E5%8A%9F%E8%83%BD%E9%9C%80%E6%B1%82%E6%96%87%E6%A1%A3.md)
-2. 运行设备屏幕尺寸为1920*1080(横屏),UI设计必须支持此尺寸
+2. 运行设备屏幕尺寸为1024x600(横屏),屏幕密度为200，UI设计必须支持此尺寸

lib/core/localization/app_localizations.dart

@@ -93,6 +93,7 @@ class AppLocalizations {
   // 完成提示
   String get runComplete => _localizedValues[locale.languageCode]?['runComplete'] ?? '运行完成';
   String get sampleDropGuide => _localizedValues[locale.languageCode]?['sampleDropGuide'] ?? '请将样本滴入检测卡';
+  String get complete => _localizedValues[locale.languageCode]?['complete'] ?? '完成';
 
   // 补充缺失的翻译
   String get lightOn => _localizedValues[locale.languageCode]?['lightOn'] ?? '亮';
@@ -198,6 +199,7 @@ class AppLocalizations {
       'noData': '暂无数据',
       'runComplete': '运行完成',
       'sampleDropGuide': '请将样本滴入检测卡',
+      'complete': '完成',
       'lightOn': '亮',
       'lightOff': '暗',
       'enabled': '启用',
@@ -300,6 +302,7 @@ class AppLocalizations {
       'noData': 'No Data',
       'runComplete': 'Complete',
       'sampleDropGuide': 'Drop sample to test card',
+      'complete': 'Done',
       'lightOn': 'On',
       'lightOff': 'Off',
       'enabled': 'Enabled',

lib/features/device/providers/serial_provider.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 
 import '../../../core/database/database_service.dart';
@@ -16,6 +18,34 @@ final serialPortServiceProvider = Provider<SerialPortService>((ref) {
   return service;
 });
 
+/// 串口连接状态（响应式）
+///
+/// 直接 `ref.watch(serialPortServiceProvider).state` 不会触发 UI 重建，
+/// 因为 [SerialPortService] 内部 `_state` 的变化不会冒泡到 Provider 层。
+/// 这里把状态抽出为独立的 StateNotifierProvider，让状态栏等 UI 能即时
+/// 反映连接/断开事件，避免出现"标题栏显示已连接、实际下发失败"的错觉。
+class SerialConnectionStateNotifier
+    extends StateNotifier<SerialConnectionState> {
+  SerialConnectionStateNotifier(this._service) : super(_service.state) {
+    _sub = _service.connectionStateChanges.listen((s) => state = s);
+  }
+
+  final SerialPortService _service;
+  late final StreamSubscription<SerialConnectionState> _sub;
+
+  @override
+  void dispose() {
+    _sub.cancel();
+    super.dispose();
+  }
+}
+
+final serialConnectionStateProvider = StateNotifierProvider<
+    SerialConnectionStateNotifier, SerialConnectionState>((ref) {
+  final service = ref.watch(serialPortServiceProvider);
+  return SerialConnectionStateNotifier(service);
+});
+
 /// 启动自动连接服务
 ///
 /// 通过 [main] 中的 ProviderContainer 在 runApp 之前触发一次，

lib/features/device/services/serial_runner.dart

@@ -66,6 +66,9 @@ class JsonSerialRunner implements Runner {
     final messageId = _msg.nextId();
     _pendingCreateTaskId = messageId;
     final msg = payload.toMessage(messageId, needAck: true);
+    // 乐观更新：与 RunStateNotifier 的运行态保持一致，
+    // 避免在 create_task 应答到达前的窗口里，pause/stop 被状态守卫静默丢弃。
+    status = RunnerStatus.running;
     DeviceLog.info('Runner.start: program="${program.name}" steps=${steps.length} '
         'temperature=${program.temperature} airflow=${program.airflowTime}');
     _msg.send(msg).then((ok) {
@@ -132,9 +135,9 @@ class JsonSerialRunner implements Runner {
     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
+    // 状态已由 start() 乐观置为 running，此处仅启动本地兜底倒计时。
-    if (status == RunnerStatus.idle || status == RunnerStatus.error) {
+    // 若发送失败，.then() 已将 status 置为 error，不应再启动倒计时。
-      status = RunnerStatus.running;
+    if (status == RunnerStatus.running) {
       _startLocalTicker();
     }
   }

lib/features/home/pages/complete_page.dart

@@ -7,6 +7,12 @@ import '../../../shared/widgets/common_button.dart';
 import '../../device/providers/run_state_provider.dart';
 
 /// 运行完成提示页面
+///
+/// 页面提供两种返回设备控制页的方式：
+/// 1. 顶部 AppBar 的返回箭头
+/// 2. 卡片底部的「完成」主按钮
+///
+/// 内部使用 [SingleChildScrollView] 包裹，避免在父级高度受限时按钮被裁切。
 class CompletePage extends ConsumerWidget {
   const CompletePage({super.key});
 
@@ -16,115 +22,143 @@ class CompletePage extends ConsumerWidget {
     final runState = ref.watch(runStateProvider);
     final runNotifier = ref.read(runStateProvider.notifier);
 
+    /// 完成并返回设备控制页
+    void finishAndGoHome() {
+      runNotifier.reset();
+      context.go('/');
+    }
+
     return Scaffold(
-      body: Container(
+      backgroundColor: AppTheme.backgroundColor,
-        color: AppTheme.backgroundColor,
+      appBar: AppBar(
+        backgroundColor: AppTheme.backgroundColor,
+        elevation: 0,
+        leading: IconButton(
+          icon: const Icon(Icons.arrow_back),
+          color: AppTheme.textPrimary,
+          tooltip: l10n?.complete ?? '完成',
+          onPressed: finishAndGoHome,
+        ),
+        title: Text(
+          l10n?.runComplete ?? '运行完成',
+          style: TextStyle(
+            color: AppTheme.textPrimary,
+            fontSize: 18,
+            fontWeight: FontWeight.w600,
+          ),
+        ),
+      ),
+      body: SafeArea(
         child: Center(
-          child: Container(
+          child: ConstrainedBox(
-            width: 600,
+            constraints: const BoxConstraints(maxWidth: 600),
-            padding: const EdgeInsets.all(40),
+            child: SingleChildScrollView(
-            decoration: BoxDecoration(
+              padding: const EdgeInsets.symmetric(horizontal: 24, vertical: 16),
-              color: Colors.white,
+              child: Container(
-              borderRadius: BorderRadius.circular(16),
+                padding: const EdgeInsets.all(32),
-              boxShadow: [
+                decoration: BoxDecoration(
-                BoxShadow(
+                  color: Colors.white,
-                  color: Colors.black.withValues(alpha: 0.15),
+                  borderRadius: BorderRadius.circular(16),
-                  blurRadius: 20,
+                  boxShadow: [
-                  offset: const Offset(0, 10),
+                    BoxShadow(
-                ),
+                      color: Colors.black.withValues(alpha: 0.15),
-              ],
+                      blurRadius: 20,
-            ),
+                      offset: const Offset(0, 10),
-            child: Column(
-              mainAxisSize: MainAxisSize.min,
-              children: [
-                // 成功图标
-                Container(
-                  width: 100,
-                  height: 100,
-                  decoration: BoxDecoration(
-                    color: AppTheme.successColor.withValues(alpha: 0.1),
-                    shape: BoxShape.circle,
-                  ),
-                  child: Icon(
-                    Icons.check_circle,
-                    size: 60,
-                    color: AppTheme.successColor,
-                  ),
-                ),
-
-                const SizedBox(height: 24),
-
-                // 标题
-                Text(
-                  l10n?.runComplete ?? '程序运行完成',
-                  style: TextStyle(
-                    color: AppTheme.textPrimary,
-                    fontSize: 28,
-                    fontWeight: FontWeight.bold,
-                  ),
-                ),
-
-                const SizedBox(height: 16),
-
-                // 提示信息
-                Container(
-                  padding: const EdgeInsets.symmetric(
-                    horizontal: 24,
-                    vertical: 12,
-                  ),
-                  decoration: BoxDecoration(
-                    color: AppTheme.warningColor.withValues(alpha: 0.1),
-                    borderRadius: BorderRadius.circular(8),
-                  ),
-                  child: Text(
-                    l10n?.sampleDropGuide ?? '请将样本滴入检测卡',
-                    style: TextStyle(
-                      color: AppTheme.warningColor,
-                      fontSize: 16,
-                    ),
-                  ),
-                ),
-
-                const SizedBox(height: 32),
-
-                // 操作示意图
-                _buildOperationGuide(),
-
-                const SizedBox(height: 32),
-
-                // 按钮区域
-                Row(
-                  mainAxisAlignment: MainAxisAlignment.center,
-                  children: [
-                    // 返回首页按钮
-                    CommonButton(
-                      text: l10n?.backToHome ?? '返回首页',
-                      icon: Icons.home,
-                      type: ButtonType.primary,
-                      onPressed: () {
-                        runNotifier.reset();
-                        context.go('/');
-                      },
-                    ),
-                    const SizedBox(width: 24),
-
-                    // 重新运行按钮
-                    CommonButton(
-                      text: l10n?.runAgain ?? '重新运行',
-                      icon: Icons.refresh,
-                      type: ButtonType.secondary,
-                      onPressed: () {
-                        final program = runState.currentProgram;
-                        if (program != null) {
-                          runNotifier.reset();
-                          runNotifier.start(program);
-                          context.go('/');
-                        }
-                      },
                     ),
                   ],
                 ),
-              ],
+                child: Column(
+                  mainAxisSize: MainAxisSize.min,
+                  children: [
+                    // 成功图标
+                    Container(
+                      width: 80,
+                      height: 80,
+                      decoration: BoxDecoration(
+                        color: AppTheme.successColor.withValues(alpha: 0.1),
+                        shape: BoxShape.circle,
+                      ),
+                      child: Icon(
+                        Icons.check_circle,
+                        size: 48,
+                        color: AppTheme.successColor,
+                      ),
+                    ),
+
+                    const SizedBox(height: 16),
+
+                    // 标题
+                    Text(
+                      l10n?.runComplete ?? '程序运行完成',
+                      style: TextStyle(
+                        color: AppTheme.textPrimary,
+                        fontSize: 24,
+                        fontWeight: FontWeight.bold,
+                      ),
+                    ),
+
+                    const SizedBox(height: 12),
+
+                    // 提示信息
+                    Container(
+                      padding: const EdgeInsets.symmetric(
+                        horizontal: 20,
+                        vertical: 10,
+                      ),
+                      decoration: BoxDecoration(
+                        color: AppTheme.warningColor.withValues(alpha: 0.1),
+                        borderRadius: BorderRadius.circular(8),
+                      ),
+                      child: Text(
+                        l10n?.sampleDropGuide ?? '请将样本滴入检测卡',
+                        style: TextStyle(
+                          color: AppTheme.warningColor,
+                          fontSize: 15,
+                        ),
+                      ),
+                    ),
+
+                    const SizedBox(height: 20),
+
+                    // 操作示意图
+                    _buildOperationGuide(),
+
+                    const SizedBox(height: 24),
+
+                    // 按钮区域：完成（主按钮）+ 重新运行（次按钮）
+                    Row(
+                      mainAxisAlignment: MainAxisAlignment.center,
+                      children: [
+                        // 完成按钮 - 主操作，返回设备控制页
+                        CommonButton(
+                          text: l10n?.complete ?? '完成',
+                          icon: Icons.check_circle,
+                          type: ButtonType.primary,
+                          onPressed: finishAndGoHome,
+                        ),
+                        const SizedBox(width: 16),
+
+                        // 重新运行按钮
+                        CommonButton(
+                          text: l10n?.runAgain ?? '重新运行',
+                          icon: Icons.refresh,
+                          type: ButtonType.secondary,
+                          onPressed: () {
+                            final program = runState.currentProgram;
+                            if (program != null) {
+                              runNotifier.reset();
+                              runNotifier.start(program);
+                              context.go('/');
+                            } else {
+                              finishAndGoHome();
+                            }
+                          },
+                        ),
+                      ],
+                    ),
+                  ],
+                ),
+              ),
             ),
           ),
         ),
@@ -135,7 +169,7 @@ class CompletePage extends ConsumerWidget {
   /// 操作指引示意图
   Widget _buildOperationGuide() {
     return Container(
-      padding: const EdgeInsets.all(20),
+      padding: const EdgeInsets.all(16),
       decoration: BoxDecoration(
         color: AppTheme.backgroundColor,
         borderRadius: BorderRadius.circular(8),
@@ -151,7 +185,7 @@ class CompletePage extends ConsumerWidget {
               fontWeight: FontWeight.w500,
             ),
           ),
-          const SizedBox(height: 16),
+          const SizedBox(height: 12),
           Row(
             mainAxisAlignment: MainAxisAlignment.spaceEvenly,
             children: [
@@ -171,15 +205,15 @@ class CompletePage extends ConsumerWidget {
     return Column(
       children: [
         Container(
-          width: 50,
+          width: 44,
-          height: 50,
+          height: 44,
           decoration: BoxDecoration(
             color: AppTheme.primaryColor.withValues(alpha: 0.1),
             borderRadius: BorderRadius.circular(8),
           ),
-          child: Icon(icon, color: AppTheme.primaryColor, size: 24),
+          child: Icon(icon, color: AppTheme.primaryColor, size: 22),
         ),
-        const SizedBox(height: 8),
+        const SizedBox(height: 6),
         Text(
           '$number',
           style: TextStyle(
@@ -188,7 +222,7 @@ class CompletePage extends ConsumerWidget {
             fontWeight: FontWeight.bold,
           ),
         ),
-        const SizedBox(height: 4),
+        const SizedBox(height: 2),
         Text(
           text,
           style: TextStyle(
@@ -199,4 +233,4 @@ class CompletePage extends ConsumerWidget {
       ],
     );
   }
-}
+}

lib/features/home/widgets/status_bar.dart

@@ -78,7 +78,7 @@ class _StatusBarState extends ConsumerState<StatusBar> {
   Widget build(BuildContext context) {
     final l10n = AppLocalizations.of(context);
     final deviceInfo = ref.watch(deviceInfoProvider);
-    final serialState = ref.watch(serialPortServiceProvider).state;
+    final serialState = ref.watch(serialConnectionStateProvider);
 
     return Container(
       height: 56,