improvement: some files replaced, lots of them i shall say. AGENT.MD file created. some rules and skills added for cursor agent.

.cursor/skills/frontend-structure/SKILL.md

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+---
+name: dyolink-frontend-structure
+description: Audits or refactors Dyolink frontend folder layout (components vs components/ui, thin pages). Use when moving components, fixing structure violations, or when the user mentions folder rules, page.tsx bloat, or component organization.
+---
+
+# Frontend structure audit
+
+## Target layout
+
+```
+components/ui/shared/     → reusable UI (Button, Dialog, …)
+components/ui/{feature}/ → feature UI + {Feature}Page.tsx
+components/shared/       → cross-feature non-UI
+components/{feature}/      → feature non-UI (helpers, config)
+app/**/page.tsx            → thin wrapper importing ui/{feature} page component
+```
+
+## Audit steps
+
+1. List files in `components/` **outside** `ui/` — any `.tsx` with JSX → move to `components/ui/{feature}/`.
+2. List files in `components/ui/` — any pure `.ts` helper → move to `components/{feature}/` or `components/shared/`.
+3. List `app/**/page.tsx` — if > ~30 lines of logic/state, extract to `components/ui/{feature}/{Feature}Page.tsx`.
+4. Update all `@/components/...` imports.
+5. Run `npx tsc --noEmit` in `frontend/`.
+
+## Common mistakes
+
+| Wrong | Right |
+|-------|-------|
+| `components/today/TodayDashboard.tsx` | `components/ui/today/TodayDashboard.tsx` |
+| `components/ui/treatment/treatmentTypeDisplay.ts` | `components/shared/treatmentTypeDisplay.ts` |
+| Logic in `app/.../staff/page.tsx` | `components/ui/staff/StaffPage.tsx` |
+
+## Non-UI that stays outside ui/
+
+- `components/today/widget-registry.ts`, `chart-theme.ts` (config)
+- `components/staff/workingHours.ts`
+- `components/appointments/appointmentTime.ts`
+- `components/i18n/LocaleSync.tsx` (null-render side effect for layout)