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-form.tsx

@@ -21,8 +21,11 @@ import {
 import { Sheet, SheetContent, SheetFooter, SheetHeader, SheetTitle } from '@/components/ui/sheet';
 import { Separator } from '@/components/ui/separator';
 import { TagPicker } from '@/components/shared/tag-picker';
+import { CountryCombobox } from '@/components/shared/country-combobox';
+import { SubdivisionCombobox } from '@/components/shared/subdivision-combobox';
 import { apiFetch } from '@/lib/api/client';
 import { createCompanySchema, type CreateCompanyInput } from '@/lib/validators/companies';
+import type { CountryCode } from '@/lib/i18n/countries';
 
 type CompanyStatus = 'active' | 'dissolved';
 
@@ -39,6 +42,8 @@ interface CompanyFormProps {
     taxId: string | null;
     registrationNumber: string | null;
     incorporationCountry: string | null;
+    incorporationCountryIso: string | null;
+    incorporationSubdivisionIso: string | null;
     incorporationDate: string | null;
     status: string;
     billingEmail: string | null;
@@ -79,6 +84,8 @@ export function CompanyForm({ open, onOpenChange, company }: CompanyFormProps) {
         taxId: company.taxId ?? undefined,
         registrationNumber: company.registrationNumber ?? undefined,
         incorporationCountry: company.incorporationCountry ?? undefined,
+        incorporationCountryIso: company.incorporationCountryIso ?? undefined,
+        incorporationSubdivisionIso: company.incorporationSubdivisionIso ?? undefined,
         incorporationDate: company.incorporationDate
           ? new Date(company.incorporationDate)
           : undefined,
@@ -169,7 +176,24 @@ export function CompanyForm({ open, onOpenChange, company }: CompanyFormProps) {
               </div>
               <div className="space-y-1">
                 <Label>Incorporation Country</Label>
-                <Input {...register('incorporationCountry')} placeholder="e.g. MT" />
+                <CountryCombobox
+                  value={watch('incorporationCountryIso')}
+                  onChange={(iso) => {
+                    setValue('incorporationCountryIso', iso ?? undefined);
+                    // Wipe subdivision when country flips — codes are country-scoped.
+                    setValue('incorporationSubdivisionIso', undefined);
+                  }}
+                  data-testid="company-incorp-country"
+                />
+              </div>
+              <div className="space-y-1">
+                <Label>Incorporation Region</Label>
+                <SubdivisionCombobox
+                  value={watch('incorporationSubdivisionIso')}
+                  onChange={(code) => setValue('incorporationSubdivisionIso', code ?? undefined)}
+                  country={(watch('incorporationCountryIso') as CountryCode | undefined) ?? null}
+                  data-testid="company-incorp-subdivision"
+                />
               </div>
               <div className="space-y-1">
                 <Label>Incorporation Date</Label>