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/patients/patient-form.tsx

@@ -86,6 +86,7 @@ export const PatientForm = forwardRef<PatientFormRef, PatientFormProps>(
         policyHolder: "",
         allergies: "",
         medicalConditions: "",
+        preferredLanguage: "English",
         status: "UNKNOWN",
         userId: user?.id,
       };
@@ -208,6 +209,36 @@ export const PatientForm = forwardRef<PatientFormRef, PatientFormProps>(
                   </FormItem>
                 )}
               />
+
+              <FormField
+                control={form.control}
+                name="preferredLanguage"
+                render={({ field }) => (
+                  <FormItem>
+                    <FormLabel>Preferred Language</FormLabel>
+                    <Select
+                      onValueChange={field.onChange}
+                      value={(field.value as string) || "English"}
+                    >
+                      <FormControl>
+                        <SelectTrigger>
+                          <SelectValue placeholder="Select language" />
+                        </SelectTrigger>
+                      </FormControl>
+                      <SelectContent>
+                        <SelectItem value="English">English</SelectItem>
+                        <SelectItem value="Spanish">Spanish</SelectItem>
+                        <SelectItem value="Portuguese">Portuguese</SelectItem>
+                        <SelectItem value="Mandarin">Mandarin</SelectItem>
+                        <SelectItem value="Cantonese">Cantonese</SelectItem>
+                        <SelectItem value="Arabic">Arabic</SelectItem>
+                        <SelectItem value="Haitian Creole">Haitian Creole</SelectItem>
+                      </SelectContent>
+                    </Select>
+                    <FormMessage />
+                  </FormItem>
+                )}
+              />
             </div>
           </div>