清理已删除的资源文件

- 移除 public 目录（由 hugo 命令自动生成）
- 清理 resources/_gen 缓存文件（Hugo 会自动重新生成）

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

Author: 3 people

.github/workflows/hugo.yml

@@ -22,7 +22,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     env:
-      HUGO_VERSION: 0.139.3
+      HUGO_VERSION: 0.154.5
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -64,4 +64,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v4