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>

client/src/layout/NurseLayout.tsx

@@ -0,0 +1,38 @@
+'use client';
+import { FunctionComponent, PropsWithChildren, useMemo } from 'react';
+import { useTranslations } from 'next-intl';
+import { ROUTES } from '@/constants';
+import { LinkToPage } from '@/utils';
+import TopBarAndSideBarLayout from './TopBarAndSideBarLayout';
+
+/**
+ * Nurse app shell — the "نمای پرستار" experience (verification, dashboard, EVV visits).
+ * Uses the shared TopBar + SideBar engine: a temporary drawer on mobile, persistent on
+ * desktop. Nav is role-scoped to the nurse routes.
+ * @layout NurseLayout
+ */
+const NurseLayout: FunctionComponent<PropsWithChildren> = ({ children }) => {
+  const t = useTranslations('nav');
+  const tShell = useTranslations('shell');
+
+  const sidebarItems: Array<LinkToPage> = useMemo(
+    () => [
+      { title: t('dashboard'), path: ROUTES.NURSE, icon: 'dashboard' },
+      { title: t('verification'), path: ROUTES.NURSE_VERIFICATION, icon: 'verification' },
+      { title: t('visits'), path: ROUTES.NURSE_VISITS, icon: 'visits' },
+    ],
+    [t]
+  );
+
+  return (
+    <TopBarAndSideBarLayout
+      sidebarItems={sidebarItems}
+      title={tShell('nurse_app')}
+      variant="sidebarPersistentOnDesktop"
+    >
+      {children}
+    </TopBarAndSideBarLayout>
+  );
+};
+
+export default NurseLayout;