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/findFirstOrThrowUser.schema.ts

@@ -31,6 +31,7 @@ export const UserFindFirstOrThrowSelectSchema: z.ZodType<Prisma.UserSelect> = z.
     twilioSettings: z.boolean().optional(),
     aiSettings: z.boolean().optional(),
     officeHours: z.boolean().optional(),
+    officeContact: z.boolean().optional(),
     _count: z.boolean().optional()
   }).strict() as unknown as z.ZodType<Prisma.UserSelect>;
 
@@ -56,6 +57,7 @@ export const UserFindFirstOrThrowSelectZodSchema = z.object({
     twilioSettings: z.boolean().optional(),
     aiSettings: z.boolean().optional(),
     officeHours: z.boolean().optional(),
+    officeContact: z.boolean().optional(),
     _count: z.boolean().optional()
   }).strict();