ci(release): include webui build artifact in GitHub release workflow

.github/workflows/release.yml

@@ -39,6 +39,23 @@ jobs:
       - name: Package artifacts
         run: make package-all BUILD_TARGETS="linux/amd64 linux/arm64 linux/riscv64 darwin/amd64 darwin/arm64 windows/amd64 windows/arm64"
 
+      - name: Setup Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20'
+          cache: 'npm'
+          cache-dependency-path: webui/package-lock.json
+
+      - name: Build WebUI
+        run: |
+          if [ -f webui/package-lock.json ]; then
+            npm ci --prefix webui
+          else
+            npm install --prefix webui
+          fi
+          npm run build --prefix webui
+          tar -czf build/clawgo-webui-dist-${{ github.sha }}.tar.gz -C webui dist
+
       - name: Upload artifacts
         uses: actions/upload-artifact@v4
         with:
@@ -47,6 +64,7 @@ jobs:
             build/*.tar.gz
             build/*.zip
             build/checksums.txt
+            build/clawgo-webui-dist-*.tar.gz
           if-no-files-found: error
 
   publish-release:
@@ -79,3 +97,4 @@ jobs:
             build/*.tar.gz
             build/*.zip
             build/checksums.txt
+            build/clawgo-webui-dist-*.tar.gz