feat(flutter): 首页顶栏改为通知铃铛入口

lib/pages/home/widgets/home_browse_header.dart

@@ -5,10 +5,11 @@ import 'package:flutter/material.dart';
 import '../../../core/theme/app_colors.dart';
 import '../../../core/theme/app_dimens.dart';
 import '../../../l10n/app_localizations.dart';
+import '../../notices/notices_page.dart';
 
 const double _searchHeight = 36;
 
-/// 首页固定顶栏：搜索、星期与头像入口。
+/// 首页固定顶栏：搜索、通知与头像入口。
 class HomeBrowseHeader extends StatelessWidget {
   const HomeBrowseHeader({
     super.key,
@@ -22,7 +23,6 @@ class HomeBrowseHeader extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     final l10n = AppLocalizations.of(context)!;
-    final weekday = _weekday(l10n);
     return SizedBox(
       height: AppDimens.contentHeaderHeight,
       child: Padding(
@@ -33,7 +33,7 @@ class HomeBrowseHeader extends StatelessWidget {
           children: [
             Expanded(child: _search(l10n, onSearch)),
             const SizedBox(width: AppDimens.spaceSm),
-            _weekdayText(weekday),
+            _notifications(context, l10n),
             const SizedBox(width: AppDimens.spaceSm),
             _profile(l10n),
           ],
@@ -42,18 +42,6 @@ class HomeBrowseHeader extends StatelessWidget {
     );
   }
 
-  String _weekday(AppLocalizations l10n) {
-    return switch (DateTime.now().weekday) {
-      DateTime.monday => l10n.weekdayMon,
-      DateTime.tuesday => l10n.weekdayTue,
-      DateTime.wednesday => l10n.weekdayWed,
-      DateTime.thursday => l10n.weekdayThu,
-      DateTime.friday => l10n.weekdayFri,
-      DateTime.saturday => l10n.weekdaySat,
-      _ => l10n.weekdaySun,
-    };
-  }
-
   Widget _search(AppLocalizations l10n, VoidCallback onTap) {
     return Semantics(
       button: true,
@@ -95,14 +83,29 @@ class HomeBrowseHeader extends StatelessWidget {
     );
   }
 
-  Widget _weekdayText(String value) {
-    return Text(
-      value,
-      key: const Key('home-weekday'),
-      style: const TextStyle(
-        color: AppColors.muted,
-        fontSize: AppDimens.caption,
-        fontWeight: FontWeight.w600,
+  Widget _notifications(BuildContext context, AppLocalizations l10n) {
+    return Semantics(
+      button: true,
+      label: l10n.notices,
+      child: InkWell(
+        key: const Key('home-notifications'),
+        customBorder: const CircleBorder(),
+        onTap: () => Navigator.of(
+          context,
+        ).push(MaterialPageRoute<void>(builder: (_) => const NoticesPage())),
+        child: Container(
+          width: AppDimens.tapTarget,
+          height: AppDimens.tapTarget,
+          decoration: const BoxDecoration(
+            color: AppColors.card,
+            shape: BoxShape.circle,
+          ),
+          child: const Icon(
+            Icons.notifications_none_rounded,
+            color: AppColors.onSurface,
+            size: AppDimens.accountIcon,
+          ),
+        ),
       ),
     );
   }