ci: only include zip file in release assets and artifacts

Remove individual files (main.js, manifest.json, styles.css) from
release assets and build artifacts. Only keep the zip package.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.github/workflows/check.yml

@@ -107,9 +107,5 @@ jobs:
         uses: actions/upload-artifact@v4
         with:
           name: plugin-build-${{ steps.version.outputs.version }}-${{ github.sha }}
-          path: |
-            ${{ env.ZIP_NAME }}
-            main.js
-            manifest.json
-            styles.css
+          path: ${{ env.ZIP_NAME }}
           retention-days: 7

.releaserc.json

@@ -65,10 +65,7 @@
       "@semantic-release/github",
       {
         "assets": [
-          { "path": "git-files-push-*.zip", "label": "Plugin Package" },
-          { "path": "main.js", "label": "main.js" },
-          { "path": "manifest.json", "label": "manifest.json" },
-          { "path": "styles.css", "label": "styles.css" }
+          { "path": "git-files-push-*.zip", "label": "Plugin Package" }
         ]
       }
     ]