Unit Tests / test (push) Successful in 10s
## Summary - Closes #16 - Clear unused imports/bindings, empty `{}` prop patterns, `==` vs `===`, and hook dependency gaps across App, contexts, and pages - Replace invalid `calc(3rem + unset)` in `index.css` so Css Minimizer no longer fails ## Test plan - [x] `npm run build` in `llm-fe` succeeds (no ESLint / postcss-calc errors) - [ ] Spot-check SignIn, dashboard, account, feedback, document storage pages still render - [ ] Confirm WebSocket/message flows still work after MessageContext dep cleanupReviewed-on: #17