Fix paper identity, Qwen-assisted PDF metadata, and chat evidence - #2

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/checkout@v4, actions/setup-node@v4, pnpm/action-setup@v4. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

React Hook useEffect has missing dependencies: 'loadLibrary' and 'selected'. Either include them or remove the dependency array

React Hook useEffect has missing dependencies: 'selected' and 'user?.workspace_id'. Either include them or remove the dependency array