feat(billing): renewals, coupons, VAT numbering, billing cycles and invoice payment tracking

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>

app/Http/Controllers/Api/Admin/Invoice/InvoiceController.php

@@ -42,7 +42,9 @@ class InvoiceController extends Controller
 
     public function index(Request $request): JsonResponse
     {
-        $query = $this->invoiceRepository->filter(
+        $perPage = min((int) $request->get('per_page', 15), 100);
+
+        $data = $this->invoiceRepository->filter(
             $request->all(),
             [
                 'payment',
@@ -54,13 +56,14 @@ class InvoiceController extends Controller
             [],
             ['*'],
             true
-        );
+        )->paginate($perPage);
 
         return response()->json([
             'error' => false,
             'data' => [
-                'items' => InvoiceResource::collection($query->get())->resolve(),
-                'total' => $query->count(),
+                'items' => InvoiceResource::collection($data->items())->resolve(),
+                'total' => $data->total(),
+                'per_page' => $data->perPage(),
             ],
         ]);
     }