feat: add Procedure Duration/Time Slot settings and custom appointment type

- Add Settings > Advanced > Procedure Duration/Time Slot page with three sections:
  1. Procedure Duration: CDT codes with durations (editable table, save per section)
  2. Doctor Time Slot: drag-to-block visual grid (A/B/C columns, 8 AM–9 PM, edit/delete slots)
  3. Hygienist Time Slot: procedure descriptions with durations
- Backend: ProcedureTimeslot Prisma model, storage, and GET/PUT /api/procedure-timeslot route
- DB migration: procedure_timeslot table
- Appointment form: when type is "Other", show a free-text input for custom description; saved as other:<description> and decoded for display on the schedule card

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

apps/Backend/src/storage/index.ts

@@ -21,6 +21,7 @@ import { twilioStorage } from "./twilio-storage";
 import { aiSettingsStorage } from "./ai-settings-storage";
 import { officeHoursStorage } from "./office-hours-storage";
 import { officeContactStorage } from "./office-contact-storage";
+import { procedureTimeslotStorage } from "./procedure-timeslot-storage";
 
 
 export const storage = {
@@ -45,6 +46,7 @@ export const storage = {
   ...aiSettingsStorage,
   ...officeHoursStorage,
   ...officeContactStorage,
+  ...procedureTimeslotStorage,
 
 };
 

apps/Backend/src/storage/procedure-timeslot-storage.ts

@@ -0,0 +1,15 @@
+import { prisma as db } from "@repo/db/client";
+
+export const procedureTimeslotStorage = {
+  async getProcedureTimeslot(userId: number) {
+    return db.procedureTimeslot.findUnique({ where: { userId } });
+  },
+
+  async upsertProcedureTimeslot(userId: number, data: object) {
+    return db.procedureTimeslot.upsert({
+      where: { userId },
+      update: { data },
+      create: { userId, data },
+    });
+  },
+};