feat(intake): residence-type capture + CRM-owned inquiry emails for website cutover

Website register-interest form now offers the 3 residence types as a
multi-select; the choice + preferred-contact flow into the CRM inquiry
payload, the inbox detail, and the residential emails.

- inquiry inbox detail surfaces residence type(s), preferred contact,
  type-of-interest, comments (full data capture)
- residential-inquiry emails: client confirmation names the chosen
  villa(s); sales alert converted to the canonical detail-line format
  (uniform with berth/contact) + residence type(s)/preferred contact +
  plain-text part
- website-intake-fields parses residence_types[] + method_of_contact
- contact_form alerts split to their own recipient key
  (contact_notification_recipients)
- Residential Interests section: new residence_type field (schema +
  migration 0099, validators, inline select on the detail)
- contact-form-alert email refactor shipped (interest-alert style)

Tests: website-intake-fields, residential-inquiry templates,
contact-form-alert, residential-interest validators.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01L2qc3xZTfif7N4Wq3QDa8X

tests/unit/validators/residential-interest.test.ts

@@ -0,0 +1,44 @@
+import { describe, expect, it } from 'vitest';
+
+import {
+  RESIDENCE_TYPES,
+  createResidentialInterestSchema,
+  updateResidentialInterestSchema,
+} from '@/lib/validators/residential';
+
+describe('residential interest residenceType', () => {
+  it('accepts a known residence type', () => {
+    const parsed = createResidentialInterestSchema.parse({
+      residentialClientId: 'rc_1',
+      residenceType: 'Two Bedroom Marina Villa',
+    });
+    expect(parsed.residenceType).toBe('Two Bedroom Marina Villa');
+  });
+
+  it('coerces empty string to null (inline-select clear)', () => {
+    const parsed = updateResidentialInterestSchema.parse({ residenceType: '' });
+    expect(parsed.residenceType).toBeNull();
+  });
+
+  it('accepts explicit null', () => {
+    const parsed = updateResidentialInterestSchema.parse({ residenceType: null });
+    expect(parsed.residenceType).toBeNull();
+  });
+
+  it('rejects an unknown residence type', () => {
+    expect(() =>
+      createResidentialInterestSchema.parse({
+        residentialClientId: 'rc_1',
+        residenceType: 'Penthouse Suite',
+      }),
+    ).toThrow();
+  });
+
+  it('exposes the three offered unit types', () => {
+    expect(RESIDENCE_TYPES).toEqual([
+      'Two Bedroom Marina Villa',
+      'Four Bedroom Oceanfront Villa',
+      'Five Bedroom Oceanfront Villa',
+    ]);
+  });
+});