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/en.json

@@ -3,15 +3,19 @@
     "search": "Search",
     "loading": "Loading...",
     "noResults": "No results found",
+    "noProjects": "No projects yet",
     "viewMore": "View More",
-    "backToHome": "Back to Home"
+    "backToHome": "Back to Home",
+    "viewDetails": "VIEW DETAILS"
   },
   "home": {
     "title": "AI Project Navigator",
     "subtitle": "Discover and explore AI projects",
     "featuredProjects": "Featured Projects",
     "browseByTag": "Browse by Tag",
-    "searchPlaceholder": "Search AI projects..."
+    "searchPlaceholder": "Search AI projects...",
+    "metaTitle": "Agent Park - AI Project Navigator",
+    "metaDescription": "Discover and explore quality AI projects from across the web"
   },
   "project": {
     "details": "Project Details",
@@ -21,11 +25,34 @@
     "website": "Website",
     "github": "GitHub",
     "huggingface": "HuggingFace",
-    "paper": "Paper"
+    "paper": "Paper",
+    "submitYourProject": "Submit Your Project",
+    "submitProjectTitle": "Submit Your Project",
+    "submitProjectDescription": "Have an AI tool worth sharing? Add it to Agent Park.",
+    "submitNow": "SUBMIT NOW"
   },
   "navigation": {
     "home": "Home",
     "projects": "Projects",
-    "about": "About"
+    "blog": "Blog",
+    "about": "About",
+    "submitProject": "SUBMIT PROJECT"
+  },
+  "layout": {
+    "announcement": "DISCOVER THE FUTURE OF AI AGENTS",
+    "announcementHref": "/projects",
+    "stayUpdated": "STAY UPDATED",
+    "stayUpdatedDesc": "Get the latest AI tools and trends delivered straight to your inbox. No spam, just intelligence.",
+    "email": "E-mail",
+    "subscribe": "SUBSCRIBE",
+    "subscribeConsent": "Subscribe to Agent Park updates",
+    "footerDesc": "Discover and explore high-quality AI projects from across the web. Curated for developers and enthusiasts.",
+    "resources": "Resources",
+    "legal": "Legal",
+    "privacyPolicy": "Privacy Policy",
+    "termsOfService": "Terms of Service",
+    "followUs": "Follow Us",
+    "copyright": "© 2025 Agent Park. All rights reserved.",
+    "designedFor": "DESIGNED FOR AI BUILDERS"
   }
 }