feat: add two-tab timetable UI and glass dock

mobile/lib/app/app_controller.dart

@@ -2,7 +2,6 @@ import 'package:flutter/foundation.dart';
 
 import '../domain/app_snapshot.dart';
 import '../domain/app_settings.dart';
-import '../domain/course.dart';
 import '../data/snapshot_store.dart';
 import '../data/json_schedule_import.dart';
 import '../services/notification_service.dart';
@@ -29,6 +28,9 @@ class AppController extends ChangeNotifier {
       isDemo ? _demoSettings! : snapshot.settings;
   Future<void> _run(Future<void> Function() operation) {
     final next = _queue.then((_) async {
+      if (storageReady) {
+        lastError = null;
+      }
       try {
         await operation();
       } catch (error) {
@@ -84,14 +86,16 @@ class AppController extends ChangeNotifier {
     isDemo = false;
   });
   Future<void> updateSettings(AppSettings value) => _run(() async {
-    if (![5, 10, 15, 30, 60].contains(value.reminderMinutes))
+    if (![5, 10, 15, 30, 60].contains(value.reminderMinutes)) {
       throw ArgumentError('提醒时间无效');
+    }
     await _save(snapshot.copyWith(settings: value));
-    if (isDemo)
+    if (isDemo) {
       _demoSettings = _demoSettings!.copyWith(
         colorMode: value.colorMode,
         singleColorArgb: value.singleColorArgb,
       );
+    }
     await _reconcile();
   });
   Future<void> applyImport(
@@ -101,8 +105,9 @@ class AppController extends ChangeNotifier {
     if (draft.courses.isEmpty && (!draft.explicitlyEmpty || !confirmedEmpty)) {
       throw const FormatException('未检测到课程，已有课表保持不变');
     }
-    if (draft.courses.map((c) => c.id).toSet().length != draft.courses.length)
+    if (draft.courses.map((c) => c.id).toSet().length != draft.courses.length) {
       throw const FormatException('课程标识重复');
+    }
     if (draft.source == CourseSource.demo) {
       _demo = draft.courses;
       isDemo = true;
@@ -117,8 +122,9 @@ class AppController extends ChangeNotifier {
       );
       return;
     }
-    if (draft.courses.any((c) => c.source != draft.source))
+    if (draft.courses.any((c) => c.source != draft.source)) {
       throw const FormatException('课程来源不一致');
+    }
     await _save(
       snapshot.copyWith(
         courses: draft.courses,
@@ -195,6 +201,9 @@ class AppController extends ChangeNotifier {
   });
   Future<void> refreshServices() => _run(_reconcile);
   Future<void> _reconcile() async {
+    if (!storageReady) {
+      return;
+    }
     final settings = snapshot.settings;
     final occurrences = settings.semester == null
         ? <CourseOccurrence>[]

mobile/lib/app/app_theme.dart

@@ -0,0 +1,78 @@
+import 'package:flutter/material.dart';
+
+import '../domain/app_settings.dart';
+
+const river = Color(0xFF348F91);
+const ink = Color(0xFF183F43);
+const canvas = Color(0xFFF3F7F6);
+const coursePalette = [
+  Color(0xFFDDEEEF),
+  Color(0xFFE3E7F6),
+  Color(0xFFF6E7D6),
+  Color(0xFFE6EDDE),
+  Color(0xFFF3DFE7),
+  Color(0xFFE6E3F4),
+];
+Color courseColor(String id, AppSettings settings) =>
+    settings.colorMode == ColorMode.single
+    ? Color(settings.singleColorArgb).withValues(alpha: 0.18)
+    : coursePalette[id.codeUnits.fold<int>(0, (a, b) => a + b) %
+          coursePalette.length];
+ThemeData hepanTheme() => ThemeData(
+  useMaterial3: true,
+  colorScheme: ColorScheme.fromSeed(seedColor: river, surface: Colors.white),
+  scaffoldBackgroundColor: canvas,
+  textTheme: ThemeData.light().textTheme.apply(
+    bodyColor: ink,
+    displayColor: ink,
+  ),
+  appBarTheme: const AppBarTheme(
+    backgroundColor: canvas,
+    foregroundColor: ink,
+    centerTitle: false,
+    elevation: 0,
+  ),
+  inputDecorationTheme: InputDecorationTheme(
+    filled: true,
+    fillColor: canvas,
+    border: OutlineInputBorder(
+      borderRadius: BorderRadius.circular(14),
+      borderSide: BorderSide.none,
+    ),
+  ),
+  filledButtonTheme: FilledButtonThemeData(
+    style: FilledButton.styleFrom(
+      backgroundColor: river,
+      foregroundColor: Colors.white,
+      padding: const EdgeInsets.symmetric(horizontal: 22, vertical: 15),
+      shape: RoundedRectangleBorder(borderRadius: BorderRadius.circular(16)),
+    ),
+  ),
+);
+
+class SurfaceCard extends StatelessWidget {
+  const SurfaceCard({
+    super.key,
+    required this.child,
+    this.padding = const EdgeInsets.all(20),
+  });
+  final Widget child;
+  final EdgeInsets padding;
+  @override
+  Widget build(BuildContext context) => Container(
+    padding: padding,
+    decoration: BoxDecoration(
+      color: Colors.white.withValues(alpha: 0.92),
+      borderRadius: BorderRadius.circular(24),
+      border: Border.all(color: Colors.white),
+      boxShadow: [
+        BoxShadow(
+          color: ink.withValues(alpha: 0.035),
+          blurRadius: 20,
+          offset: const Offset(0, 5),
+        ),
+      ],
+    ),
+    child: Material(type: MaterialType.transparency, child: child),
+  );
+}

mobile/lib/app/hepan_app.dart

@@ -0,0 +1,145 @@
+import 'package:flutter/material.dart';
+
+import 'app_controller.dart';
+import 'app_theme.dart';
+import '../widgets/glass_dock.dart';
+import '../features/timetable/timetable_page.dart';
+import '../features/profile/profile_page.dart';
+
+class HepanApp extends StatelessWidget {
+  const HepanApp({super.key, required this.controller, this.schoolBuilder});
+  final AppController controller;
+  final Widget Function()? schoolBuilder;
+  @override
+  Widget build(BuildContext context) => MaterialApp(
+    debugShowCheckedModeBanner: false,
+    title: '河畔Everyday',
+    theme: hepanTheme(),
+    home: _Shell(controller: controller, schoolBuilder: schoolBuilder),
+  );
+}
+
+class _Shell extends StatefulWidget {
+  const _Shell({required this.controller, this.schoolBuilder});
+  final AppController controller;
+  final Widget Function()? schoolBuilder;
+  @override
+  State<_Shell> createState() => _ShellState();
+}
+
+class _ShellState extends State<_Shell> with WidgetsBindingObserver {
+  int _tab = 0;
+  @override
+  void initState() {
+    super.initState();
+    WidgetsBinding.instance.addObserver(this);
+  }
+
+  @override
+  void dispose() {
+    WidgetsBinding.instance.removeObserver(this);
+    super.dispose();
+  }
+
+  @override
+  void didChangeAppLifecycleState(AppLifecycleState state) {
+    if (state == AppLifecycleState.resumed) {
+      widget.controller.refreshServices();
+    }
+  }
+
+  void _school() {
+    if (widget.schoolBuilder != null) {
+      Navigator.push(
+        context,
+        MaterialPageRoute<void>(builder: (_) => widget.schoolBuilder!()),
+      );
+    } else {
+      showDialog<void>(
+        context: context,
+        builder: (context) => AlertDialog(
+          title: const Text('学校认证'),
+          content: const Text('学校认证入口正在接入。你可以先体验示例课表或导入课表文件。'),
+          actions: [
+            TextButton(
+              onPressed: () => Navigator.pop(context),
+              child: const Text('知道了'),
+            ),
+          ],
+        ),
+      );
+    }
+  }
+
+  @override
+  Widget build(BuildContext context) => AnimatedBuilder(
+    animation: widget.controller,
+    builder: (context, _) => Scaffold(
+      body: Container(
+        decoration: const BoxDecoration(
+          gradient: LinearGradient(
+            begin: Alignment.topLeft,
+            end: Alignment.bottomRight,
+            colors: [Color(0xFFF0F7F5), Color(0xFFF7F8F5), Color(0xFFEFF5F3)],
+          ),
+        ),
+        child: SafeArea(
+          bottom: false,
+          child: Stack(
+            children: [
+              Positioned.fill(
+                child: Column(
+                  children: [
+                    if (widget.controller.lastError != null)
+                      Container(
+                        width: double.infinity,
+                        color: const Color(0xFFF8ECE6),
+                        padding: const EdgeInsets.all(12),
+                        child: Column(
+                          crossAxisAlignment: CrossAxisAlignment.start,
+                          children: [
+                            Text(
+                              widget.controller.lastError!,
+                              style: const TextStyle(fontSize: 12),
+                            ),
+                            if (!widget.controller.storageReady)
+                              TextButton(
+                                onPressed: widget.controller.restoreBackup,
+                                child: const Text('恢复最近备份'),
+                              ),
+                          ],
+                        ),
+                      ),
+                    Expanded(
+                      child: IndexedStack(
+                        index: _tab,
+                        children: [
+                          TimetablePage(controller: widget.controller),
+                          ProfilePage(
+                            controller: widget.controller,
+                            onLogin: _school,
+                          ),
+                        ],
+                      ),
+                    ),
+                  ],
+                ),
+              ),
+              Positioned(
+                left: 0,
+                right: 0,
+                bottom: 16 + MediaQuery.paddingOf(context).bottom,
+                child: Center(
+                  child: GlassDock(
+                    selectedIndex: _tab,
+                    onSelected: (index) => setState(() => _tab = index),
+                  ),
+                ),
+              ),
+            ],
+          ),
+        ),
+      ),
+    ),
+  );
+}