feat(i18n): country/phone/timezone/subdivision primitives + form wiring

Cross-cutting i18n polish for forms across the marina + residential + company
domains. Introduces a single source of truth for country/phone/timezone/
subdivision data and replaces every nationality-as-free-text and timezone-
as-string Input with a dedicated combobox.

PR1  Countries — ALL_COUNTRY_CODES (~250 ISO-3166-1 alpha-2), Intl.DisplayNames
     for localized labels, detectDefaultCountry() with navigator-region
     fallback to US, CountryCombobox with regional-indicator flag glyphs +
     compact mode for inline use.
PR2  Phone — libphonenumber-js wrapper (parsePhone / formatAsYouType /
     callingCodeFor), PhoneInput with flag dropdown + national-format
     AsYouType + paste-detect that flips the country dropdown for pasted
     international strings.
PR3  Timezones — country->IANA map (250 entries, multi-zone for AU/BR/CA/CD/
     ID/KZ/MN/MX/RU/US), formatTimezoneLabel ("Europe/London (UTC+1)"),
     TimezoneCombobox with Suggested/All grouping driven by countryHint.
PR4  Subdivisions — wraps the iso-3166-2 npm package (~5000 ISO 3166-2
     codes for every country), per-country cache, SubdivisionCombobox with
     "Pick a country first" / "No regions available" empty states.
PR5  Schema deltas (migration 0015) — clients.nationality_iso, clientContacts
     {value_e164, value_country}, clientAddresses {country_iso, subdivision_iso},
     residentialClients {phone_e164, phone_country, nationality_iso, timezone,
     place_of_residence_country_iso, subdivision_iso}, companies {incorporation_
     country_iso, incorporation_subdivision_iso}, companyAddresses {country_iso,
     subdivision_iso}. Plus shared zod validators (validators/i18n.ts) used
     by every entity validator + route handler.
PR6  ClientForm + ClientDetail — CountryCombobox replaces nationality Input,
     TimezoneCombobox replaces timezone Input (driven by nationalityIso hint),
     PhoneInput conditionally rendered for phone/whatsapp contacts. Inline
     editors (InlineCountryField / InlineTimezoneField / InlinePhoneField)
     for the detail-page overview rows + ContactsEditor.
PR7  Residential client form + detail — phone -> PhoneInput, nationality/
     timezone/place-of-residence-country/subdivision rows in both create
     sheet and inline-editable detail view. Subdivision wipes when country
     flips since codes are country-scoped.
PR8  Company form + detail — incorporation country -> CountryCombobox,
     incorporation region -> SubdivisionCombobox in both modes.
PR9  Public inquiry endpoint — accepts pre-normalized phoneE164/phoneCountry
     and i18n fields from newer website builds, server-side parsePhone()
     fallback for legacy raw-international submissions. Old Nuxt builds
     keep working unchanged.

Tests: 4 unit suites for the primitives (25 tests), 1 integration spec for
the public phone-normalization path (3 tests), 1 smoke spec asserting the
combobox triggers render in all three create sheets.

Test totals: vitest 713 -> 741 (+28).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/clients/client-tabs.tsx

@@ -4,8 +4,11 @@ import { useMutation, useQueryClient } from '@tanstack/react-query';
 
 import type { DetailTab } from '@/components/shared/detail-layout';
 import { InlineEditableField } from '@/components/shared/inline-editable-field';
+import { InlineCountryField } from '@/components/shared/inline-country-field';
+import { InlineTimezoneField } from '@/components/shared/inline-timezone-field';
 import { InlineTagEditor } from '@/components/shared/inline-tag-editor';
 import { NotesList } from '@/components/shared/notes-list';
+import type { CountryCode } from '@/lib/i18n/countries';
 import { ClientYachtsTab } from '@/components/clients/client-yachts-tab';
 import { ClientCompaniesTab } from '@/components/clients/client-companies-tab';
 import { ClientReservationsTab } from '@/components/clients/client-reservations-tab';
@@ -15,6 +18,7 @@ import { apiFetch } from '@/lib/api/client';
 type ClientPatchField =
   | 'fullName'
   | 'nationality'
+  | 'nationalityIso'
   | 'preferredContactMethod'
   | 'preferredLanguage'
   | 'timezone'
@@ -64,6 +68,7 @@ interface ClientTabsOptions {
   client: {
     fullName: string;
     nationality?: string | null;
+    nationalityIso?: string | null;
     preferredContactMethod?: string | null;
     preferredLanguage?: string | null;
     timezone?: string | null;
@@ -73,6 +78,8 @@ interface ClientTabsOptions {
       id: string;
       channel: string;
       value: string;
+      valueE164?: string | null;
+      valueCountry?: string | null;
       label?: string | null;
       isPrimary: boolean;
     }>;
@@ -131,7 +138,13 @@ function OverviewTab({
             <InlineEditableField value={client.fullName} onSave={save('fullName')} />
           </EditableRow>
           <EditableRow label="Nationality">
-            <InlineEditableField value={client.nationality} onSave={save('nationality')} />
+            <InlineCountryField
+              value={client.nationalityIso ?? null}
+              onSave={async (iso) => {
+                await mutation.mutateAsync({ nationalityIso: iso });
+              }}
+              data-testid="client-nationality-inline"
+            />
           </EditableRow>
           <EditableRow label="Preferred Language">
             <InlineEditableField
@@ -140,7 +153,14 @@ function OverviewTab({
             />
           </EditableRow>
           <EditableRow label="Timezone">
-            <InlineEditableField value={client.timezone} onSave={save('timezone')} />
+            <InlineTimezoneField
+              value={client.timezone}
+              countryHint={(client.nationalityIso as CountryCode | null) ?? null}
+              onSave={async (tz) => {
+                await mutation.mutateAsync({ timezone: tz });
+              }}
+              data-testid="client-timezone-inline"
+            />
           </EditableRow>
           <EditableRow label="Preferred Contact">
             <InlineEditableField