chore: streamline compatibility tracking and documentation

.github/workflows/release.yml

@@ -34,16 +34,26 @@ jobs:
     steps:
       - uses: actions/checkout@v4
 
+      - uses: actions/setup-go@v5
+        with:
+          go-version: '1.21'
+
       - name: Verify release notes
         run: test -s ".github/release-notes/${GITHUB_REF_NAME}.md"
 
+      - name: Generate static preview for the archive
+        working-directory: tools
+        run: go run . preview all
+
       - name: Package themes/
         run: |
           VERSION=${GITHUB_REF#refs/tags/}
           ARCHIVE="gitea-mail-templates-${VERSION}"
-          mkdir -p "dist/${ARCHIVE}/docs"
+          mkdir -p "dist/${ARCHIVE}/docs" "dist/${ARCHIVE}/preview"
           cp -r themes LICENSE README.md CONTRIBUTING.md COMPATIBILITY.md "dist/${ARCHIVE}/"
           cp docs/README.zh-CN.md docs/CONTRIBUTING.zh-CN.md "dist/${ARCHIVE}/docs/"
+          cp -r docs/images "dist/${ARCHIVE}/docs/"
+          cp preview/index.html preview/rendered.js "dist/${ARCHIVE}/preview/"
           cd dist
           zip -r "${ARCHIVE}.zip" "${ARCHIVE}"
           tar -czf "${ARCHIVE}.tar.gz" "${ARCHIVE}"