ci: add npm run build step to release/publish workflows

After TS migration, main.js is now a build artifact from src/main.ts.
Both workflows must build the plugin before creating the release artifact.

.github/workflows/publish.yml

@@ -18,11 +18,23 @@ jobs:
         with:
           python-version: '3.11'
 
-      - name: Build package
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: "npm"
+          cache-dependency-path: paperforge/plugin/package-lock.json
+
+      - name: Build Python package
         run: |
           python -m pip install --upgrade build
           python -m build
 
+      - name: Build plugin bundle
+        working-directory: paperforge/plugin
+        run: |
+          npm ci
+          npm run build
+
       - name: Publish to PyPI
         uses: pypa/gh-action-pypi-publish@release/v1
         with:

.github/workflows/release.yml

@@ -31,6 +31,10 @@ jobs:
           npm ci
           npx vitest run --reporter=verbose
 
+      - name: Build plugin bundle
+        working-directory: paperforge/plugin
+        run: npm run build
+
       - name: Create Release
         uses: softprops/action-gh-release@v2
         with: