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/companies/company-tabs.tsx

@@ -5,11 +5,14 @@ import { useMutation, useQueryClient } from '@tanstack/react-query';
 import type { DetailTab } from '@/components/shared/detail-layout';
 import { EmptyState } from '@/components/shared/empty-state';
 import { InlineEditableField } from '@/components/shared/inline-editable-field';
+import { InlineCountryField } from '@/components/shared/inline-country-field';
+import { SubdivisionCombobox } from '@/components/shared/subdivision-combobox';
 import { InlineTagEditor } from '@/components/shared/inline-tag-editor';
 import { NotesList } from '@/components/shared/notes-list';
 import { CompanyMembersTab } from '@/components/companies/company-members-tab';
 import { CompanyOwnedYachtsTab } from '@/components/companies/company-owned-yachts-tab';
 import { apiFetch } from '@/lib/api/client';
+import type { CountryCode } from '@/lib/i18n/countries';
 
 type CompanyPatchField =
   | 'name'
@@ -17,6 +20,8 @@ type CompanyPatchField =
   | 'taxId'
   | 'registrationNumber'
   | 'incorporationCountry'
+  | 'incorporationCountryIso'
+  | 'incorporationSubdivisionIso'
   | 'incorporationDate'
   | 'status'
   | 'billingEmail'
@@ -34,6 +39,8 @@ interface CompanyTabsCompany {
   taxId: string | null;
   registrationNumber: string | null;
   incorporationCountry: string | null;
+  incorporationCountryIso: string | null;
+  incorporationSubdivisionIso: string | null;
   incorporationDate: string | null;
   status: string;
   billingEmail: string | null;
@@ -114,9 +121,26 @@ function OverviewTab({ companyId, company }: { companyId: string; company: Compa
             />
           </EditableRow>
           <EditableRow label="Incorporation Country">
-            <InlineEditableField
-              value={company.incorporationCountry}
-              onSave={save('incorporationCountry')}
+            <InlineCountryField
+              value={company.incorporationCountryIso}
+              onSave={async (iso) => {
+                // Wipe subdivision when country flips — codes are country-scoped.
+                await mutation.mutateAsync({
+                  incorporationCountryIso: iso,
+                  incorporationSubdivisionIso: null,
+                });
+              }}
+              data-testid="company-incorp-country-inline"
+            />
+          </EditableRow>
+          <EditableRow label="Incorporation Region">
+            <SubdivisionCombobox
+              value={company.incorporationSubdivisionIso}
+              onChange={(code) => {
+                void mutation.mutateAsync({ incorporationSubdivisionIso: code });
+              }}
+              country={(company.incorporationCountryIso as CountryCode | null) ?? null}
+              data-testid="company-incorp-subdivision-inline"
             />
           </EditableRow>
           <EditableRow label="Incorporation Date">