feat(app): 多页面动态化 — 搜索/资料/教师/贴纸库/模板/日历

- SearchPage: 热搜词从日记标签频率动态生成 + 模板搜索网格
- ProfilePage: 成就徽章从 AchievementBloc 动态加载 + 头像首字母
- TeacherPage: 班级码改为对话框展示 (班级名+码+人数)
- StickerLibraryPage: 分类从 API 动态合并 + 精选包卡片动态化
- TemplateGalleryPage: 适配动态数据
- ClassPage: 微调
- HomePage: 路由适配
- CalendarBloc: 新增测试
- AppRouter: 路由更新

app/lib/features/stickers/views/sticker_library_page.dart

@@ -19,10 +19,19 @@ class _StickerLibraryPageState extends State<StickerLibraryPage> {
   late final StickerBloc _bloc;
   final _searchController = TextEditingController();
 
-  /// 设计规格中的 8 个分类
-  static const _specCategories = [
-    '推荐', '可爱', '植物', '手绘', '校园', '节日', '文字', '和纸胶带',
-  ];
+  /// 默认分类 — 从 API 数据动态补充
+  static const _defaultCategories = ['推荐', '可爱', '植物', '手绘', '校园', '节日', '文字', '和纸胶带'];
+
+  List<String> get _categories {
+    final apiCategories = _bloc.state.packs
+        .map((p) => p.category)
+        .whereType<String>()
+        .toSet()
+        .toList();
+    if (apiCategories.isEmpty) return _defaultCategories;
+    // 合并：推荐 + API 返回的分类
+    return ['推荐', ...apiCategories];
+  }
 
   @override
   void initState() {
@@ -120,7 +129,7 @@ class _StickerLibraryPageState extends State<StickerLibraryPage> {
                   child: ListView(
                     scrollDirection: Axis.horizontal,
                     padding: const EdgeInsets.symmetric(horizontal: 16),
-                    children: _specCategories.map((cat) {
+                    children: _categories.map((cat) {
                       final isSelected = cat == state.selectedCategory ||
                           (cat == '推荐' && state.selectedCategory == '全部');
                       return Padding(
@@ -148,13 +157,13 @@ class _StickerLibraryPageState extends State<StickerLibraryPage> {
                 ),
                 const SizedBox(height: 12),
 
-                // ---- 精选贴纸包卡片 ----
-                if (state.selectedCategory == '全部')
+                // ---- 精选贴纸包卡片（动态数据） ----
+                if (state.selectedCategory == '全部' && state.filteredPacks.isNotEmpty)
                   Padding(
                     padding: const EdgeInsets.symmetric(horizontal: 16),
-                    child: const _FeaturedPackCard(),
+                    child: _FeaturedPackCard(pack: state.filteredPacks.first),
                   ),
-                if (state.selectedCategory == '全部')
+                if (state.selectedCategory == '全部' && state.filteredPacks.isNotEmpty)
                   const SizedBox(height: 16),
 
                 // ---- 贴纸包网格 ----
@@ -188,9 +197,10 @@ class _StickerLibraryPageState extends State<StickerLibraryPage> {
   }
 }
 
-/// 精选贴纸包卡片 — 渐变背景 + 限时免费标签
+/// 精选贴纸包卡片 — 渐变背景 + 动态数据
 class _FeaturedPackCard extends StatelessWidget {
-  const _FeaturedPackCard();
+  const _FeaturedPackCard({required this.pack});
+  final StickerPack pack;
 
   @override
   Widget build(BuildContext context) {
@@ -198,7 +208,7 @@ class _FeaturedPackCard extends StatelessWidget {
     return GestureDetector(
       onTap: () {
         ScaffoldMessenger.of(context).showSnackBar(
-          const SnackBar(content: Text('打开精选贴纸包: 治愈小动物')),
+          SnackBar(content: Text('打开精选贴纸包: ${pack.name}')),
         );
       },
       child: Container(
@@ -214,7 +224,6 @@ class _FeaturedPackCard extends StatelessWidget {
         ),
         child: Row(
           children: [
-            // emoji 图标区域
             Container(
               width: 64,
               height: 64,
@@ -223,30 +232,38 @@ class _FeaturedPackCard extends StatelessWidget {
                 borderRadius: AppRadius.mdBorder,
               ),
               alignment: Alignment.center,
-              child: const Text('🧸', style: TextStyle(fontSize: 36)),
+              child: Text(pack.displayCover, style: const TextStyle(fontSize: 36)),
             ),
             const SizedBox(width: 16),
             Expanded(
               child: Column(
                 crossAxisAlignment: CrossAxisAlignment.start,
                 children: [
-                  Text('治愈小动物', style: theme.textTheme.titleMedium?.copyWith(
+                  Text(pack.name, style: theme.textTheme.titleMedium?.copyWith(
                     fontWeight: FontWeight.w700, color: Colors.white,
                   )),
                   const SizedBox(height: 4),
-                  Text('超可爱的手绘小动物贴纸', style: theme.textTheme.bodySmall?.copyWith(
-                    color: Colors.white.withValues(alpha: 0.85),
-                  )),
+                  Text(
+                    pack.description ?? '${pack.stickerCount} 张精选贴纸',
+                    style: theme.textTheme.bodySmall?.copyWith(
+                      color: Colors.white.withValues(alpha: 0.85),
+                    ),
+                    maxLines: 1,
+                    overflow: TextOverflow.ellipsis,
+                  ),
                   const SizedBox(height: 8),
                   Container(
                     padding: const EdgeInsets.symmetric(horizontal: 8, vertical: 3),
                     decoration: BoxDecoration(
-                      color: AppColors.secondary,
+                      color: pack.isFree ? AppColors.secondary : AppColors.rose,
                       borderRadius: AppRadius.pillBorder,
                     ),
-                    child: const Text('限时免费', style: TextStyle(
-                      fontSize: 11, fontWeight: FontWeight.w600, color: Colors.white,
-                    )),
+                    child: Text(
+                      pack.isFree ? '免费' : '精品',
+                      style: const TextStyle(
+                        fontSize: 11, fontWeight: FontWeight.w600, color: Colors.white,
+                      ),
+                    ),
                   ),
                 ],
               ),