fix: allow claims without appointment + support post/core multi-tooth input

- Make appointmentId nullable/optional in Prisma Zod schema via @zod rich
  comment so claims can be submitted without an existing appointment
- Convert undefined appointmentId to null in all claim form handlers and
  the backend claim creation endpoint
- Add AI classifier rule for expanding one procedure across multiple
  comma-separated tooth numbers (e.g. "post/core on #23, 24, 25, 26")
- Add "post/core" (slash) alias to CDT lookup maps

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

packages/db/generated/prisma/index.d.ts

@@ -14580,6 +14580,9 @@ export namespace Prisma {
     scalars: $Extensions.GetPayloadResult<{
       id: number
       patientId: number
+      /**
+       * @zod.number.int().nullable().optional()
+       */
       appointmentId: number | null
       userId: number
       staffId: number

packages/db/generated/prisma/package.json

@@ -1,5 +1,5 @@
 {
-  "name": "prisma-client-210cfd1f3d7388620d3c172d9abdf5f3d200db6f7d9237d98c6c0804e5262885",
+  "name": "prisma-client-d351a8e2afa5a626b25c24fc325b9f8c2c9b0ee5bb0f800b83ea538e43d12368",
   "main": "index.js",
   "types": "index.d.ts",
   "browser": "default.js",

packages/db/generated/prisma/schema.prisma

@@ -206,6 +206,7 @@ model AppointmentProcedure {
 model Claim {
   id                 Int                @id @default(autoincrement())
   patientId          Int
+  /// @zod.number.int().nullable().optional()
   appointmentId      Int?
   userId             Int
   staffId            Int