feat: AI chat system with LangGraph, multi-step patient flows, and appointment rescheduling

- Add floating chat window Hand-off to AI toggle (per-patient) and after-hours AI toggle (global)
- Add LangGraph-powered appointment reminder flow: AI introduces itself, classifies YES/NO, handles confirmation with appointment date/time
- Add multi-step rescheduling flow: ASAP vs next week, tomorrow offer, Mon/Tue/Wed picker, morning/afternoon time slot — automatically updates appointment in DB
- Add new patient / after-hours flow: new vs existing patient, dental insurance check, MassHealth Selenium eligibility check (auto-uses saved member ID + DOB for existing patients), self-pay fallback
- Add AI Chat Settings page (Settings → Advanced) with editable greeting templates and LangGraph flow diagrams for both reminder and new-patient flows
- Add Schedule a New Patient template option in chat window, starts new-patient conversation flow
- Add GET/PUT endpoints for AI handoff, after-hours handoff, and AI chat templates
- Add multilingual support (7 languages) across all AI reply nodes with LLM generation and hardcoded fallbacks
- Add pending reschedule in-memory store and conversation stage tracking across all flows

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

packages/db/shared/schemas/objects/UserOrderByWithRelationInput.schema.ts

@@ -18,7 +18,8 @@ import { TwilioSettingsOrderByWithRelationInputObjectSchema as TwilioSettingsOrd
 import { AiSettingsOrderByWithRelationInputObjectSchema as AiSettingsOrderByWithRelationInputObjectSchema } from './AiSettingsOrderByWithRelationInput.schema';
 import { OfficeHoursOrderByWithRelationInputObjectSchema as OfficeHoursOrderByWithRelationInputObjectSchema } from './OfficeHoursOrderByWithRelationInput.schema';
 import { OfficeContactOrderByWithRelationInputObjectSchema as OfficeContactOrderByWithRelationInputObjectSchema } from './OfficeContactOrderByWithRelationInput.schema';
-import { ProcedureTimeslotOrderByWithRelationInputObjectSchema as ProcedureTimeslotOrderByWithRelationInputObjectSchema } from './ProcedureTimeslotOrderByWithRelationInput.schema'
+import { ProcedureTimeslotOrderByWithRelationInputObjectSchema as ProcedureTimeslotOrderByWithRelationInputObjectSchema } from './ProcedureTimeslotOrderByWithRelationInput.schema';
+import { InsuranceContactOrderByRelationAggregateInputObjectSchema as InsuranceContactOrderByRelationAggregateInputObjectSchema } from './InsuranceContactOrderByRelationAggregateInput.schema'
 
 const makeSchema = () => z.object({
   id: SortOrderSchema.optional(),
@@ -43,7 +44,8 @@ const makeSchema = () => z.object({
   aiSettings: z.lazy(() => AiSettingsOrderByWithRelationInputObjectSchema).optional(),
   officeHours: z.lazy(() => OfficeHoursOrderByWithRelationInputObjectSchema).optional(),
   officeContact: z.lazy(() => OfficeContactOrderByWithRelationInputObjectSchema).optional(),
-  procedureTimeslot: z.lazy(() => ProcedureTimeslotOrderByWithRelationInputObjectSchema).optional()
+  procedureTimeslot: z.lazy(() => ProcedureTimeslotOrderByWithRelationInputObjectSchema).optional(),
+  insuranceContacts: z.lazy(() => InsuranceContactOrderByRelationAggregateInputObjectSchema).optional()
 }).strict();
 export const UserOrderByWithRelationInputObjectSchema: z.ZodType<Prisma.UserOrderByWithRelationInput> = makeSchema() as unknown as z.ZodType<Prisma.UserOrderByWithRelationInput>;
 export const UserOrderByWithRelationInputObjectZodSchema = makeSchema();