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/generated/prisma/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "prisma-client-db87bf66545e77505291e1e9a0077b158237c6d88a3205c70a049bfe0bf44c4f",
+  "name": "prisma-client-0bdd2a07b3e749bc95e70fecd3048246327d26e93efa4b1a746b1800ef21ae70",
   "main": "index.js",
   "types": "index.d.ts",
   "browser": "default.js",