ci: preserve download assets on docs deploy

.github/workflows/deploy-docs.yml

@@ -43,14 +43,46 @@ jobs:
           node-version: "22"
           cache: pnpm
 
+      - name: Setup Bun
+        uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
+
       - name: Setup Pages
         uses: actions/configure-pages@v5
 
       - name: Install dependencies
         run: pnpm install --frozen-lockfile
 
-      - name: Build docs
-        run: pnpm docs:build
+      - name: Build docs and download pages
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          pnpm docs:build
+
+          DIST="site/.vitepress/dist"
+          mkdir -p "$DIST/alpha" "$DIST/stable" "$DIST/download" "$DIST/stable/download"
+
+          gh api -H "Accept: application/vnd.github+json" repos/${{ github.repository }}/releases --paginate > "$DIST/releases.json"
+
+          STABLE_TAG="$(gh release list --repo ${{ github.repository }} --limit 100 --json tagName,isDraft,isPrerelease --jq '[.[] | select(.isDraft == false and .isPrerelease == false)][0].tagName // ""')"
+          if [ -n "$STABLE_TAG" ]; then
+            gh release download --repo ${{ github.repository }} "$STABLE_TAG" --pattern "stable-latest.json" --output "$DIST/stable/latest.json" || echo '{}' > "$DIST/stable/latest.json"
+          else
+            echo '{}' > "$DIST/stable/latest.json"
+          fi
+
+          ALPHA_TAG="$(gh release list --repo ${{ github.repository }} --limit 100 --json tagName,isDraft,isPrerelease --jq '[.[] | select(.isDraft == false and .isPrerelease == true)][0].tagName // ""')"
+          if [ -n "$ALPHA_TAG" ]; then
+            gh release download --repo ${{ github.repository }} "$ALPHA_TAG" --pattern "alpha-latest.json" --output "$DIST/alpha/latest.json" || echo '{}' > "$DIST/alpha/latest.json"
+          else
+            echo '{}' > "$DIST/alpha/latest.json"
+          fi
+
+          bun scripts/build-release-download-page.ts --latest-json "$DIST/stable/latest.json" --releases-json "$DIST/releases.json" --output-file "$DIST/download/index.html"
+          cp "$DIST/download/index.html" "$DIST/stable/download/index.html"
+          cp "$DIST/alpha/latest.json" "$DIST/latest.json"
+          cp "$DIST/alpha/latest.json" "$DIST/latest-canary.json"
 
       - name: Upload Pages artifact
         uses: actions/upload-pages-artifact@v4