feat: migrate from Vue 3 to Astro 5 with blog system

- Replace Vue 3 + Vite with Astro 5 + Vue islands architecture
- Implement i18n routing with zh/en/ja language support
- Add Content Collections for blog system
- Create blog pages with PostCard, TableOfContents components
- Keep interactive Vue components (NavBar, AboutSection, BackToTop)
- Convert static sections to Astro components
- Add RSS feeds for each language
- Update GitHub Actions for Astro deployment
- Simplify navigation bar layout

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: Kosthi

.github/workflows/deploy.yml

@@ -11,8 +11,8 @@ permissions:
   id-token: write
 
 concurrency:
-  group: pages
-  cancel-in-progress: true
+  group: "pages"
+  cancel-in-progress: false
 
 jobs:
   build:
@@ -24,26 +24,29 @@ jobs:
       - name: Setup Node
         uses: actions/setup-node@v4
         with:
-          node-version: 20
-          cache: npm
+          node-version: "20"
+          cache: "npm"
+
+      - name: Setup Pages
+        uses: actions/configure-pages@v5
 
       - name: Install dependencies
         run: npm ci
 
-      - name: Build
+      - name: Build with Astro
         run: npm run build
 
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v3
         with:
-          path: dist
+          path: ./dist
 
   deploy:
-    needs: build
-    runs-on: ubuntu-latest
     environment:
       name: github-pages
-      url: ${{ steps.deployment.outputs.page_url }}
+      url: $${{ steps.deployment.outputs.page_url }}
+    runs-on: ubuntu-latest
+    needs: build
     steps:
       - name: Deploy to GitHub Pages
         id: deployment

astro.config.mjs

@@ -0,0 +1,28 @@
+import { defineConfig } from 'astro/config';
+import vue from '@astrojs/vue';
+import sitemap from '@astrojs/sitemap';
+
+export default defineConfig({
+  site: 'https://rushdb-lab.github.io',
+  integrations: [
+    vue(),
+    sitemap({
+      i18n: {
+        defaultLocale: 'zh',
+        locales: {
+          zh: 'zh-CN',
+          en: 'en-US',
+          ja: 'ja-JP',
+        },
+      },
+    }),
+  ],
+  i18n: {
+    defaultLocale: 'zh',
+    locales: ['zh', 'en', 'ja'],
+    routing: {
+      prefixDefaultLocale: true,
+      redirectToDefaultLocale: false,
+    },
+  },
+});