feat: Select Procedures flow, batch-column NPI provider fix, auto PDF save

- Add 'Select Procedures' right-click option on appointment page (separate from Claims/PreAuth)
- Select Procedures form saves CDT codes + NPI provider to AppointmentProcedure storage
- Remove Save button from insurance claim form; Claims/PreAuth opens for insurance submission only
- Claims/PreAuth auto-prefills from saved procedures including NPI provider
- Batch-column: procedures npiProviderId takes priority over stale claim npiProviderId
- Batch-column: auto-save PDF to patient Documents after successful submission (no socket needed)
- Add npiProviderId column to AppointmentProcedure table (prisma db push)
- Fix 'invalid db creation invocation': guard staffId, npiProviderId, procedureDate as Date object, totalBilled NaN guard
- Add full error logging to batch-column catch block

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

apps/Backend/src/storage/appointments-storage.ts

@@ -22,6 +22,11 @@ export interface IStorage {
     appointment: UpdateAppointment
   ): Promise<Appointment>;
   deleteAppointment(id: number): Promise<void>;
+  getPatientAppointmentByDateAndStaff(
+    patientId: number,
+    date: Date,
+    staffId: number
+  ): Promise<Appointment | undefined>;
   getPatientAppointmentByDateTime(
     patientId: number,
     date: Date,
@@ -127,6 +132,19 @@ export const appointmentsStorage: IStorage = {
     }
   },
 
+  async getPatientAppointmentByDateAndStaff(
+    patientId: number,
+    date: Date,
+    staffId: number
+  ): Promise<Appointment | undefined> {
+    return (
+      (await db.appointment.findFirst({
+        where: { patientId, date, staffId },
+        orderBy: { createdAt: "desc" },
+      })) ?? undefined
+    );
+  },
+
   async getPatientAppointmentByDateTime(
     patientId: number,
     date: Date,