Fix: Add pagination to admin appointments endpoint

- Added pagination with page/per_page query params
- Fixed N+1 query by using eager-loaded user relationship
- Removed unused _get_user_email helper function
- Updated frontend to handle paginated response
- Regenerated API types

frontend/app/admin/appointments/page.tsx

@@ -9,6 +9,7 @@ import { useRequireAuth } from "../../hooks/useRequireAuth";
 import { components } from "../../generated/api";
 
 type AppointmentResponse = components["schemas"]["AppointmentResponse"];
+type PaginatedAppointments = components["schemas"]["PaginatedResponse_AppointmentResponse_"];
 
 // Helper to format datetime
 function formatDateTime(isoString: string): string {
@@ -200,8 +201,9 @@ export default function AdminAppointmentsPage() {
 
   const fetchAppointments = useCallback(async () => {
     try {
-      const data = await api.get<AppointmentResponse[]>("/api/admin/appointments");
-      setAppointments(data);
+      // Fetch with large per_page to get all appointments for now
+      const data = await api.get<PaginatedAppointments>("/api/admin/appointments?per_page=100");
+      setAppointments(data.records);
     } catch (err) {
       console.error("Failed to fetch appointments:", err);
       setError("Failed to load appointments");

frontend/app/generated/api.ts

@@ -445,7 +445,7 @@ export interface paths {
         };
         /**
          * Get All Appointments
-         * @description Get all appointments (admin only), sorted by date descending.
+         * @description Get all appointments (admin only), sorted by date descending with pagination.
          */
         get: operations["get_all_appointments_api_admin_appointments_get"];
         put?: never;
@@ -704,6 +704,19 @@ export interface components {
             /** Revoked At */
             revoked_at: string | null;
         };
+        /** PaginatedResponse[AppointmentResponse] */
+        PaginatedResponse_AppointmentResponse_: {
+            /** Records */
+            records: components["schemas"]["AppointmentResponse"][];
+            /** Total */
+            total: number;
+            /** Page */
+            page: number;
+            /** Per Page */
+            per_page: number;
+            /** Total Pages */
+            total_pages: number;
+        };
         /** PaginatedResponse[CounterRecordResponse] */
         PaginatedResponse_CounterRecordResponse_: {
             /** Records */
@@ -1617,7 +1630,10 @@ export interface operations {
     };
     get_all_appointments_api_admin_appointments_get: {
         parameters: {
-            query?: never;
+            query?: {
+                page?: number;
+                per_page?: number;
+            };
             header?: never;
             path?: never;
             cookie?: never;
@@ -1630,7 +1646,16 @@ export interface operations {
                     [name: string]: unknown;
                 };
                 content: {
-                    "application/json": components["schemas"]["AppointmentResponse"][];
+                    "application/json": components["schemas"]["PaginatedResponse_AppointmentResponse_"];
+                };
+            };
+            /** @description Validation Error */
+            422: {
+                headers: {
+                    [name: string]: unknown;
+                };
+                content: {
+                    "application/json": components["schemas"]["HTTPValidationError"];
                 };
             };
         };