feat: chat window, preferred language, insurance contact, and AI call eligibility

- Schedule: right-click Chat option opens floating SMS chat window
- Chat window: SMS template selector with appointment date/time pre-filled
- Chat window: office name and phone pulled from Settings > Office Contact
- Chat window: Preferred Language selector (English, Spanish, Portuguese,
  Mandarin, Cantonese, Arabic, Haitian Creole) with fully translated templates
  and locale-aware date/time formatting
- Patient form: Preferred Language field (add/edit), default English
- Settings > Office Contact: added Dental Office Name field
- Settings > Advanced: Insurance Contact page (CRUD — company name + phone)
- Prisma schema: preferredLanguage on Patient, officeName on OfficeContact,
  new InsuranceContact model
- Patient management: Upload Patient Document moved below Patient Records
- Insurance Eligibility: AI Call Insurance collapsible section; insurance
  company and phone auto-populated from saved Insurance Contacts

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

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

@@ -29,6 +29,7 @@ import {
   Clock,
   Building2,
   Timer,
+  BookOpen,
 } from "lucide-react";
 import { cn } from "@/lib/utils";
 import { useMemo, useState, useEffect } from "react";
@@ -239,6 +240,11 @@ export function Sidebar() {
             path: "/settings/proceduretimeslot",
             icon: <Timer className="h-4 w-4 text-gray-400" />,
           },
+          {
+            name: "Insurance Contact",
+            path: "/settings/insurancecontact",
+            icon: <BookOpen className="h-4 w-4 text-gray-400" />,
+          },
         ],
       },
     ],