feat: add Office Contact settings page and reorder Advanced sidebar

- Add OfficeContact Prisma model with receptionist name, dentist name, phone, email, fax fields
- Create GET/PUT /api/office-contact backend route and storage
- Add OfficeContactCard frontend component under Settings > Advanced
- Reorder Advanced sidebar: Office Hours → Office Contact → Twilio Settings → Google AI Settings

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/db/shared/schemas/variants/input/User.input.ts

@@ -21,7 +21,8 @@ export const UserInputSchema = z.object({
     communications: z.array(z.unknown()),
     twilioSettings: z.unknown().optional().nullable(),
     aiSettings: z.unknown().optional().nullable(),
-    officeHours: z.unknown().optional().nullable()
+    officeHours: z.unknown().optional().nullable(),
+    officeContact: z.unknown().optional().nullable()
 }).strict();
 
 export type UserInputType = z.infer<typeof UserInputSchema>;