Fix V5 candidate-depth ceiling and pinned-checkpoint fallback - #15

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. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/

src/pages/EngineerCopilotPage.jsx:61:5: React Hook useEffect has a missing dependency: 'loadCalls'

src/pages/EngineerCopilotPage.jsx:66:7: Calling setState synchronously within an effect can trigger cascading renders

src/pages/EngineerCopilotPage.jsx:61:5: Calling setState synchronously within an effect can trigger cascading renders

src/pages/ProjectsPage.jsx:25:5: Calling setState synchronously within an effect can trigger cascading renders

src/pages/DashboardPage.jsx:38:5: Calling setState synchronously within an effect can trigger cascading renders

src/pages/DashboardPage.jsx:12:3: Identifier 'CheckCircle2' is imported but never used.

src/pages/AssetsPage.jsx:27:5: Calling setState synchronously within an effect can trigger cascading renders

src/AuthContext.jsx:29:5: Calling setState synchronously within an effect can trigger cascading renders

src/AuthContext.jsx:75:17: Fast refresh only works when a file only exports components. Use a new file to share constants or functions between components.

src/AuthContext.jsx:20:14: Catch parameter 'err' is caught but never used.