feat: appointment type inference, procedure codes on cards, claim attachment fixes

- Add appointment type categories matching insurance claim form (recall, filling, pedo, dentures, implant, endo, crown, perio, extraction, ortho, consultation, emergency, other)
- Auto-infer appointment type from CDT codes with priority rules (endo > implant > crown > ...)
- typeLocked flag prevents auto-overwrite when user manually sets type
- Show appointment type label and procedure codes on schedule cards
- Background sync on /day route retroactively fixes stale appointment types
- Fix PUT /api/claims/:id to save claimFiles (previously silently dropped)
- Auto-link AppointmentFile records to ClaimFile when claim is created or updated
- Fix D5750 (denture reline) CDT range to map correctly to dentures category
- Fix typeLocked Zod rejection in appointment update route

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

packages/db/shared/helpers/decimal-helpers.ts

@@ -1,8 +1,7 @@
 import * as z from 'zod';
 
-import type { Prisma } from '../../generated/prisma';
-
-import Decimal from "decimal.js";
+import { Prisma } from '../../generated/prisma';
+import Decimal from 'decimal.js';
 
 // DECIMAL HELPERS
 //------------------------------------------------------
@@ -24,7 +23,7 @@ export const isValidDecimalInput = (
   if (v === undefined || v === null) return false;
   return (
     // Explicit instance checks first
-    v instanceof Decimal ||
+    v instanceof Prisma.Decimal ||
     // If Decimal.js is present and imported by the generator, this symbol exists at runtime
     // eslint-disable-next-line @typescript-eslint/ban-ts-comment
     // @ts-ignore - Decimal may be undefined when not installed; codegen controls the import