Fix Regressions and Validate the Build

Task

Run the project’s automated checks and fix issues before deployment.

Run:

npm run lint
npm run typecheck
npm run build

Then perform a browser smoke test after the production build.

Pay particular attention to features that share boundaries:

• Reader ↔ progress
• Reader ↔ bookmarks
• Reader ↔ Highlights
• Highlights ↔ Notes
• Library ↔ Book deletion
• Home ↔ progress/activity
• authentication ↔ every protected route

Do not solve a build error by weakening type safety or removing a security check unless the implementation truly requires it.

Test

All three commands should complete successfully.

Then verify the major routes load from the production build.

Checkpoint

Readly passes lint, type checking, build validation, and a production-mode browser smoke test.