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>

apps/Frontend/src/components/layout/sidebar.tsx

@@ -27,6 +27,7 @@ import {
   Workflow,
   Bot,
   Clock,
+  Building2,
 } from "lucide-react";
 import { cn } from "@/lib/utils";
 import { useMemo, useState, useEffect } from "react";
@@ -213,6 +214,16 @@ export function Sidebar() {
           // ── Advanced ─────────────────────────────────────────
           {
             groupLabel: "Advanced",
+            name: "Office Hours",
+            path: "/settings/officehours",
+            icon: <Clock className="h-4 w-4 text-gray-400" />,
+          },
+          {
+            name: "Office Contact",
+            path: "/settings/officecontact",
+            icon: <Building2 className="h-4 w-4 text-gray-400" />,
+          },
+          {
             name: "Twilio Settings",
             path: "/settings/twilio",
             icon: <Phone className="h-4 w-4 text-gray-400" />,
@@ -222,11 +233,6 @@ export function Sidebar() {
             path: "/settings/ai",
             icon: <Bot className="h-4 w-4 text-gray-400" />,
           },
-          {
-            name: "Office Hours",
-            path: "/settings/officehours",
-            icon: <Clock className="h-4 w-4 text-gray-400" />,
-          },
         ],
       },
     ],