These rules apply to `src/**`. Follow the repo-root `AGENTS.md` first, then use this file for code inside the application source tree.
- Keep route composition in `src/views/`, reusable UI in `src/components/`, shared logic in `src/hooks/`, and shared app state in `src/stores/`.
- Before adding new state, decide whether it belongs in render, a reusable hook, or a Zustand store. Do not duplicate the same state logic across views.
- When changing React UI logic, run `yarn doctor` in addition to build, lint, and type-check. When changing layout or interaction, verify desktop and mobile behavior with `playwright-cli`.
- Prefer extending nearby tests under `src/**/__tests__/` when touching already-covered behavior.