Add feedback service, reminder diagnostics and smooth week transitions

mobile/lib/features/profile/profile_page.dart

@@ -6,7 +6,10 @@ import 'package:flutter/material.dart';
 
 import '../../app/app_controller.dart';
 import '../../app/app_theme.dart';
+import '../../app/app_version.dart';
 import '../../data/schedule_file_import.dart';
+import '../feedback/feedback_page.dart';
+import '../feedback/feedback_submission.dart';
 import 'settings_page.dart';
 import 'import_preview.dart';
 
@@ -19,12 +22,14 @@ class ProfilePage extends StatelessWidget {
     this.onLogout,
     this.logoutLabel = '退出学校登录',
     this.onUpdateTerm,
+    this.feedbackSender = const UnconfiguredFeedbackSender(),
   });
   final AppController controller;
   final VoidCallback onLogin;
   final VoidCallback? onLogout;
   final VoidCallback? onUpdateTerm;
   final String authStatus, logoutLabel;
+  final FeedbackSender feedbackSender;
   Future<void> _import(BuildContext context) async {
     try {
       final file = await FilePicker.pickFile(
@@ -212,6 +217,18 @@ class ProfilePage extends StatelessWidget {
                 '无需登录，预览课表样式',
                 controller.showDemo,
               ),
+              Divider(height: 1, color: ink.withValues(alpha: 0.06)),
+              _tile(
+                Icons.chat_bubble_outline_rounded,
+                '反馈与共建',
+                '反馈问题和建议 · 我要参与开发',
+                () => Navigator.push(
+                  context,
+                  MaterialPageRoute<void>(
+                    builder: (_) => FeedbackPage(sender: feedbackSender),
+                  ),
+                ),
+              ),
             ],
           ),
         ),
@@ -224,6 +241,14 @@ class ProfilePage extends StatelessWidget {
                 style: TextStyle(fontSize: 13, fontWeight: FontWeight.w600),
               ),
               const SizedBox(height: 6),
+              Text(
+                '版本 $appVersion',
+                style: TextStyle(
+                  fontSize: 11,
+                  color: ink.withValues(alpha: 0.45),
+                ),
+              ),
+              const SizedBox(height: 6),
               Text(
                 '今天也有值得期待的小事。',
                 style: TextStyle(

mobile/lib/features/profile/reminder_tools.dart

@@ -0,0 +1,232 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+import 'package:flutter/services.dart';
+
+import '../../app/app_controller.dart';
+import '../../app/app_theme.dart';
+import '../../app/app_version.dart' as release;
+import '../../services/notification_service.dart';
+
+class ReminderTools extends StatefulWidget {
+  const ReminderTools({super.key, required this.controller});
+
+  final AppController controller;
+
+  @override
+  State<ReminderTools> createState() => _ReminderToolsState();
+}
+
+class _ReminderToolsState extends State<ReminderTools> {
+  bool _busy = false;
+  Map<String, Object?>? _diagnosis;
+  String? _report;
+
+  void _notice(String text) =>
+      ScaffoldMessenger.of(context).showSnackBar(SnackBar(content: Text(text)));
+
+  Future<void> _run(Future<void> Function() action) async {
+    if (_busy) return;
+    setState(() => _busy = true);
+    try {
+      await action();
+    } catch (error) {
+      if (mounted) {
+        _notice(
+          error is ReminderSetupException ? error.message : '操作未完成，请检查系统设置后重试',
+        );
+      }
+    } finally {
+      if (mounted) setState(() => _busy = false);
+    }
+  }
+
+  Future<void> _test(bool scheduled) => _run(() async {
+    final message = await widget.controller.notifications.sendTestReminder(
+      scheduled: scheduled,
+    );
+    if (mounted) _notice(message);
+  });
+
+  Future<void> _check() => _run(() async {
+    await widget.controller.refreshServices();
+    final diagnosis = await widget.controller.notifications.diagnose();
+    if (!mounted) return;
+    final c = widget.controller;
+    final s = c.snapshot.settings;
+    final rawSystem = diagnosis['system'];
+    final system = rawSystem is Map ? rawSystem : const {};
+    // Copy an explicit allowlist, never raw platform errors, courses or account.
+    final report = <String, Object?>{
+      'appVersion': '${release.appVersion}+${release.appBuildNumber}',
+      'checkedAt': c.clock().toIso8601String(),
+      'remindersEnabled': s.remindersEnabled,
+      'semesterStart': s.semester?.startDate.toIso8601String(),
+      'semesterWeeks': s.semester?.totalWeeks,
+      'reminderOffsets': s.reminderOffsets,
+      'courseCount': c.snapshot.courses.length,
+      'scheduledCount': c.reminderResult.scheduledCount,
+      'reminderStatus': c.reminderResult.status.name,
+      for (final key in [
+        'notifications',
+        'exactAlarm',
+        'pendingCount',
+        'channelImportance',
+        'channelSound',
+      ])
+        key: _scalar(diagnosis[key]),
+      'activeQueryWarning': diagnosis['activeQueryWarning'] != null,
+      'errorCode': _errorCode(c.reminderErrorCode),
+      'systemError': _errorCode(diagnosis['systemError']),
+      'system': {
+        for (final key in [
+          'manufacturer',
+          'model',
+          'androidVersion',
+          'sdk',
+          'backgroundRestricted',
+          'batteryOptimizationsIgnored',
+          'powerSaveMode',
+          'interruptionFilter',
+        ])
+          key: _scalar(system[key]),
+      },
+    };
+    setState(() {
+      _diagnosis = diagnosis;
+      _report = const JsonEncoder.withIndent('  ').convert(report);
+    });
+  });
+
+  Object? _scalar(Object? value) =>
+      value is String || value is bool || value is num ? value : null;
+
+  String _errorCode(Object? value) {
+    if (value is String && RegExp(r'^[a-zA-Z0-9_]{1,64}$').hasMatch(value)) {
+      return value;
+    }
+    return value == null ? 'none' : 'unknown';
+  }
+
+  Future<void> _copy() => _run(() async {
+    final report = _report;
+    if (report == null) return;
+    await Clipboard.setData(ClipboardData(text: report));
+    if (mounted) _notice('提醒诊断已复制，可粘贴到意见反馈中');
+  });
+
+  String _permission(Object? value) => switch (value) {
+    true => '已允许',
+    false => '未允许',
+    _ => '暂时无法确认',
+  };
+
+  List<String> _summary(Map<String, Object?> diagnosis) {
+    final rawSystem = diagnosis['system'];
+    final system = rawSystem is Map ? rawSystem : const {};
+    final pending = diagnosis['pendingCount'];
+    return [
+      '通知权限：${_permission(diagnosis['notifications'])}',
+      '精确提醒：${_permission(diagnosis['exactAlarm'])}',
+      if (pending is int) '待发送提醒：$pending 条',
+      if (diagnosis['notifications'] == false) '系统通知已关闭，请在通知设置中开启。',
+      if (diagnosis['channelImportance'] == 0) '提醒通道已关闭，请在通知设置中开启。',
+      if (diagnosis['channelSound'] == false) '提醒通道处于静音，请在通知设置中检查声音。',
+      if (diagnosis['exactAlarm'] == false) '精确提醒未获允许，系统发送时间可能延迟。',
+      if (system['backgroundRestricted'] == true ||
+          system['powerSaveMode'] == true)
+        '系统正在限制后台运行，可在后台运行设置中检查。',
+      if (system['interruptionFilter'] is int &&
+          system['interruptionFilter'] != 0 &&
+          system['interruptionFilter'] != 1)
+        '勿扰模式可能影响提醒声音。',
+      if (pending == 0 && widget.controller.snapshot.settings.remindersEnabled)
+        '当前没有待发送提醒，请核对学期、课程日期和提醒提前时间。',
+      if (diagnosis['activeQueryWarning'] != null) '部分系统提醒状态暂时无法读取，可稍后再检查。',
+      if (diagnosis['systemError'] != null) '设备后台状态暂时无法读取，可在系统设置中检查。',
+    ];
+  }
+
+  @override
+  Widget build(BuildContext context) => SurfaceCard(
+    child: Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        const Text(
+          '测试与检查',
+          style: TextStyle(fontSize: 14, fontWeight: FontWeight.w600),
+        ),
+        const SizedBox(height: 8),
+        Wrap(
+          spacing: 8,
+          runSpacing: 4,
+          children: [
+            TextButton(
+              onPressed: _busy ? null : () => _test(false),
+              child: const Text('立即测试提醒'),
+            ),
+            TextButton(
+              onPressed: _busy ? null : () => _test(true),
+              child: const Text('10 秒后台测试'),
+            ),
+          ],
+        ),
+        const Text(
+          '后台测试：点击后按 Home 键回到桌面，等待约 10 秒；请勿强行停止应用。',
+          style: TextStyle(fontSize: 12, height: 1.6, color: river),
+        ),
+        const SizedBox(height: 8),
+        Wrap(
+          spacing: 8,
+          runSpacing: 4,
+          children: [
+            TextButton(
+              onPressed: _busy ? null : _check,
+              child: const Text('检查提醒'),
+            ),
+            TextButton(
+              onPressed: _busy
+                  ? null
+                  : () => _run(
+                      () => widget.controller.notifications.openSettings(
+                        background: false,
+                      ),
+                    ),
+              child: const Text('通知设置'),
+            ),
+            TextButton(
+              onPressed: _busy
+                  ? null
+                  : () => _run(
+                      () => widget.controller.notifications.openSettings(
+                        background: true,
+                      ),
+                    ),
+              child: const Text('后台运行设置'),
+            ),
+          ],
+        ),
+        if (_busy)
+          const Padding(
+            padding: EdgeInsets.symmetric(vertical: 8),
+            child: LinearProgressIndicator(),
+          ),
+        if (_diagnosis != null) ...[
+          const SizedBox(height: 8),
+          for (final line in _summary(_diagnosis!))
+            Padding(
+              padding: const EdgeInsets.only(bottom: 5),
+              child: Text(
+                line,
+                style: const TextStyle(fontSize: 12, height: 1.5),
+              ),
+            ),
+          TextButton(
+            onPressed: _busy ? null : _copy,
+            child: const Text('复制提醒诊断'),
+          ),
+        ],
+      ],
+    ),
+  );
+}

mobile/lib/features/profile/settings_page.dart

@@ -6,6 +6,7 @@ import '../../app/app_theme.dart';
 import '../../domain/app_settings.dart';
 import '../../domain/semester.dart';
 import '../../services/notification_service.dart';
+import 'reminder_tools.dart';
 
 class SettingsPage extends StatefulWidget {
   const SettingsPage({
@@ -373,6 +374,8 @@ class _SettingsPageState extends State<SettingsPage> {
               ),
             ),
             const SizedBox(height: 22),
+            if (!c.isDemo) ReminderTools(controller: c),
+            if (!c.isDemo) const SizedBox(height: 22),
             _heading('手机日历'),
             SurfaceCard(
               child: Column(