Add PR preview via GitHub Actions

.github/workflows/pr-preview.yml

@@ -0,0 +1,33 @@
+name: Deploy PR preview
+
+on:
+  pull_request:
+    types: [opened, reopened, synchronize, closed]
+
+concurrency: preview-${{ github.ref }}
+
+jobs:
+  deploy-preview:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+
+      - name: Install and build
+        if: github.event.action != 'closed'
+        run: |
+          npm install
+          npm run build
+
+      - name: Deploy preview
+        uses: rossjrw/pr-preview-action@v1
+        with:
+          source-dir: ./dist
+          preview-branch: gh-pages
+          umbrella-dir: pr-preview

README.md

@@ -77,6 +77,7 @@
 2. 在仓库设置中启用 GitHub Pages
 3. 选择 GitHub Actions 作为部署源
 4. 推送代码时将自动触发构建和部署
+5. 每个 PR 会自动生成预览链接，合并前即可在线查看效果
 
 ## 📝 使用指南