ci: migrate all workflows to pnpm, upgrade @vitejs/plugin-react to v6

- Replace npm ci with pnpm install --frozen-lockfile in all 5 workflows
- Add pnpm/action-setup@v4 step to lint, format, testing, release, publish
- Upgrade @vitejs/plugin-react 4.7.0 -> 6.0.1 (supports vite 8)
- Add @rolldown/plugin-babel as required peer dependency
- Remove package-lock.json (project uses pnpm-lock.yaml)

package.json

@@ -45,6 +45,7 @@
     "@eslint/js": "^9.39.0",
     "@pengx17/electron-forge-maker-appimage": "^1.0.2",
     "@playwright/test": "^1.56.1",
+    "@rolldown/plugin-babel": "^0.2.3",
     "@semantic-release/changelog": "^6.0.3",
     "@semantic-release/git": "^10.0.1",
     "@semantic-release/github": "^12.0.6",
@@ -62,7 +63,7 @@
     "@types/node": "^24.10.1",
     "@types/react": "^19.2.2",
     "@types/react-dom": "^19.2.2",
-    "@vitejs/plugin-react": "^4.7.0",
+    "@vitejs/plugin-react": "^6.0.1",
     "babel-plugin-react-compiler": "1.0.0",
     "code-inspector-plugin": "^1.3.3",
     "conventional-changelog-conventionalcommits": "^9.1.0",