refactor(blog): update blog post layouts and remove index pages

- Replace BlogLayout with new BlogPostLayout for better post styling
- Remove unused blog post index pages
- Add new blog post layout with enhanced typography and metadata

src/pages/zh/blog/posts/index.astro

@@ -1,22 +0,0 @@
----
-import BlogLayout from '../../../../layouts/BlogLayout.astro';
-import type { Lang } from '../../../../i18n/utils';
-
-const lang = (Astro.currentLocale || 'zh') as Lang;
----
-
-<BlogLayout title="博客文章">
-  <div class="container mx-auto px-4 py-8">
-    <h1 class="text-4xl font-bold text-center mb-8">所有博客文章</h1>
-    <p class="text-center text-muted-foreground mb-8">
-      浏览按分类和主题组织的所有博客文章。
-    </p>
-    
-    <!-- 此页面可用于其他博客组织功能 -->
-    <div class="text-center">
-      <a href="/zh/blog" class="text-primary hover:underline">
-        ← 返回博客首页
-      </a>
-    </div>
-  </div>
-</BlogLayout>

src/pages/zh/blog/posts/mastering-react-hooks.md

@@ -6,7 +6,7 @@ date: "2025年5月10日"
 readTime: "5分钟阅读"
 tags: ["React", "JavaScript", "前端"]
 slug: "mastering-react-hooks"
-layout: "../../../../layouts/BlogLayout.astro"
+layout: "../../../../layouts/BlogPostLayout.astro"
 ---
 
 # 精通 React Hooks：深入探索

src/pages/zh/blog/posts/modern-ui-tailwind.md

@@ -6,7 +6,7 @@ date: "2025年4月20日"
 readTime: "6分钟阅读"
 tags: ["CSS", "Tailwind", "UI/UX"]
 slug: "modern-ui-tailwind"
-layout: "../../../../layouts/BlogLayout.astro"
+layout: "../../../../layouts/BlogPostLayout.astro"
 ---
 
 # 使用 Tailwind CSS 构建现代 UI

src/pages/zh/blog/posts/scaling-nodejs-docker.md

@@ -6,7 +6,7 @@ date: "2025年4月25日"
 readTime: "7分钟阅读"
 tags: ["Node.js", "Docker", "DevOps"]
 slug: "scaling-nodejs-docker"
-layout: "../../../../layouts/BlogLayout.astro"
+layout: "../../../../layouts/BlogPostLayout.astro"
 ---
 
 # 使用 Docker 扩展 Node.js 应用

src/pages/zh/blog/posts/typescript-best-practices.md

@@ -6,7 +6,7 @@ date: "2025年4月15日"
 readTime: "8分钟阅读"
 tags: ["TypeScript", "架构", "最佳实践"]
 slug: "typescript-best-practices"
-layout: "../../../../layouts/BlogLayout.astro"
+layout: "../../../../layouts/BlogPostLayout.astro"
 ---
 
 # TypeScript 在大型项目中的最佳实践