Client form: when nationality is picked and timezone empty, primary
IANA zone for the country is pre-filled (skips when user has chosen
a zone explicitly). When a contact's preferred channel is `'other'`,
the inline `Label` field flips to "Specify" / "e.g. Telegram, Signal"
so the rep records what the channel actually is.
Yacht form: replace the free-text 2-letter flag input with the shared
`CountryCombobox` so flags stay valid ISO codes.
User settings: timezone pre-populates from
`Intl.DateTimeFormat().resolvedOptions().timeZone` on first load
(was empty before); country change auto-fills timezone with the same
helper as the client form. Phone field upgraded to the shared
`<PhoneInput>` (country-flag dropdown + AsYouType formatter) seeded
from the page's country state.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Matt
82fd75081a