frontend phase 0: app shells, design system & data/contract patterns

Turn the starter into the Balinyaar foundation for the three actor
experiences and lock in the patterns later phases copy.

- Cleanup: remove toastDemo namespace, placeholder home page, and the two
  dead icons; fix BottomBar to use usePathname (locale-aware active tab).
- Three actor shells under (private-routes), no layout above [locale]:
  customer (customer) group with the 5-tab bottom nav; nurse (/nurse) and
  admin (/admin) on the shared sidebar engine. Role model via constants/roles
  + useActorRole (defaults to customer until roles land in f1-b2).
- services/{domain} reference (patients) with a mock behind a config seam,
  hierarchical query keys, deliberate staleTime, and mutation invalidation;
  shared ApiEnvelope/Paginated wire types + unwrap() in lib/api/types.
- Money (integer-safe IRR/Toman) + Shamsi-date utils; toEnglishDigits helper.
- Shared composites, each tested: OtpInput, PhoneNumberField, StepperHeader,
  StatusChip, PlaceholderScreen.
- i18n: seed nav/common/shell/patients in both locales; document namespace
  conventions. Update client/CLAUDE.md Project Structure + fix ColorSchemeScript
  doc drift. Add phase report, STATUS, and REQ-001 (envelope/casing/pagination).

Gate: npm run check + test:ci green (72 tests); build green with NEXT_PUBLIC_API_URL.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

dev/shared-working-context/frontend/STATUS.md

@@ -12,4 +12,17 @@ for awareness.
 - **Requests filed:** frontend/requests/for-backend.md (yes/no)
 -->
 
-_(no phases completed yet)_
+## frontend-phase-0 — Foundations: app shells, design system & data/contract patterns — 2026-07-02
+- **Shipped:** 3 actor shells (customer bottom-nav / nurse / admin sidebar) + role-aware routing under
+  `(private-routes)`; `useActorRole`; the `services/{domain}` reference (`patients`, mocked behind a
+  seam) with deliberate Query caching + invalidation; `lib/api/types.ts` (envelope/pagination); money +
+  Shamsi-date utils; shared composites `OtpInput`/`PhoneNumberField`/`StepperHeader`/`StatusChip`/
+  `PlaceholderScreen` (each tested); i18n `nav`/`common`/`shell`/`patients` in both locales. Removed the
+  demo scaffolding; fixed the `BottomBar` pathname bug.
+- **Consumes:** dev/contracts/conventions/* + openapi/swagger.v1.json (b0 = ping only). No feature
+  contract consumed yet.
+- **Mocked client-side:** `services/patients` via `patientsMockApi` (USE_PATIENTS_MOCK=true) — template
+  for f1+. Swap is one line once real endpoints land.
+- **Gate:** npm run check green · npm run test:ci green (72 tests) · npm run build green with
+  NEXT_PUBLIC_API_URL set.
+- **Requests filed:** frontend/requests/for-backend.md — yes (REQ-001).