frontend phase 3: geography — addresses, map-pin picker & nurse coverage areas

Three domain services (mirroring the patients/nurse template): services/geography
(cached province→city→district lookups; Infinity staleTime + shared geographyKeys),
services/addresses (address book CRUD + set-primary; single-primary invariant), and
services/serviceAreas (coverage add/remove; areaExists dup-guard, districtId=null = whole city).

Four tested composites in src/components/geography: CascadingRegionSelect (drives the
cascade queries), AddressMapPicker (map-pin stand-in emitting real lat/lng), AddressForm,
AddressCard. Screens: customer address book (/addresses, reached from the profile hub) and
nurse coverage editor (/nurse/coverage, new sidebar tab, inline duplicate block + 409).

Adds geo/address/coverage i18n namespaces (both locales), location/delete/coverage icons,
ADDRESSES/NURSE_COVERAGE routes. Consumes the b4 geography-addresses contract; filed REQ-008
(accept the map pin on create/update) and REQ-009 (provinceId on CustomerAddressDto) for gaps.

Gate: npm run check + npm run test:ci (129, +17) + npm run build all green. A 5-dimension
adversarial review fixed 3 findings (map-marker RTL transform, page_size→pageSize pagination
casing, coverage districts-scope dead-end on district-less cities).

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

client/src/services/serviceAreas/constants.ts

@@ -0,0 +1,14 @@
+/**
+ * When true, the nurse service-areas domain is served by the in-memory mock (apis/mockApi.ts)
+ * behind the ServiceAreasApi seam — the duplicate `(cityId, districtId)` 409 and whole-city-first
+ * ordering are enforced in-memory so the coverage editor demos before backend-phase-4 is
+ * reachable. Flip to false to use the live `api/v1/nurse_service_areas/*` routes — no
+ * hook/component changes (see dev/shared-working-context/reports/mocks-registry.md).
+ */
+export const USE_SERVICE_AREAS_MOCK = true;
+
+/** Service areas change only on mutation; keep them warm across screen visits. */
+export const SERVICE_AREAS_STALE_TIME = 60_000;
+
+/** api-conventions default page size; `pageSize` ≤ 100. A nurse covers a handful of areas. */
+export const SERVICE_AREAS_PAGE_SIZE = 100;