feat: 添加顶部公告栏跳转链接和关闭按钮功能

- 新增 AnnouncementBar 客户端组件支持点击跳转
- 添加关闭按钮，状态保存至 localStorage
- 刷新页面后记住用户关闭状态
- 支持 i18n 配置公告内容和链接

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/messages/zh.json

@@ -3,15 +3,19 @@
     "search": "搜索",
     "loading": "加载中...",
     "noResults": "未找到结果",
+    "noProjects": "暂无项目",
     "viewMore": "查看更多",
-    "backToHome": "返回首页"
+    "backToHome": "返回首页",
+    "viewDetails": "查看详情"
   },
   "home": {
     "title": "AI 项目导航",
     "subtitle": "发现和探索全网优质 AI 项目",
     "featuredProjects": "精选项目",
     "browseByTag": "按标签浏览",
-    "searchPlaceholder": "搜索 AI 项目..."
+    "searchPlaceholder": "搜索 AI 项目...",
+    "metaTitle": "Agent Park - AI 项目导航",
+    "metaDescription": "发现和探索全网优质 AI 项目"
   },
   "project": {
     "details": "项目详情",
@@ -21,11 +25,34 @@
     "website": "官网",
     "github": "GitHub",
     "huggingface": "HuggingFace",
-    "paper": "论文"
+    "paper": "论文",
+    "submitYourProject": "提交你的项目",
+    "submitProjectTitle": "提交你的项目",
+    "submitProjectDescription": "有值得分享的 AI 工具吗？将其添加到 Agent Park。",
+    "submitNow": "立即提交"
   },
   "navigation": {
     "home": "首页",
     "projects": "项目列表",
-    "about": "关于"
+    "blog": "博客",
+    "about": "关于",
+    "submitProject": "提交项目"
+  },
+  "layout": {
+    "announcement": "发现 AI 代理的未来",
+    "announcementHref": "/projects",
+    "stayUpdated": "保持更新",
+    "stayUpdatedDesc": "获取最新的 AI 工具和趋势，直接发送到您的收件箱。没有垃圾邮件，只有智能。",
+    "email": "电子邮箱",
+    "subscribe": "订阅",
+    "subscribeConsent": "订阅 Agent Park 更新",
+    "footerDesc": "发现和探索来自全网的高质量 AI 项目。为开发者和爱好者精心策划。",
+    "resources": "资源",
+    "legal": "法律",
+    "privacyPolicy": "隐私政策",
+    "termsOfService": "服务条款",
+    "followUs": "关注我们",
+    "copyright": "© 2025 Agent Park. 保留所有权利。",
+    "designedFor": "专为 AI 构建者设计"
   }
 }