add test batches

app/Http/Controllers/Api/Exams/ExamDraftController.php

@@ -49,7 +49,7 @@ class ExamDraftController extends BaseApiController
         }
 
         $result = $this->teacherService->store($guard, $request->validated(), $request->file('draft_file'));
-        if (! $result['ok']) {
+        if (!$result['ok']) {
             return response()->json(['ok' => false, 'message' => $result['message'] ?? 'Unable to save.'], 422);
         }
 
@@ -85,7 +85,7 @@ class ExamDraftController extends BaseApiController
         }
 
         $result = $this->adminService->uploadLegacy($guard, $request->validated(), $request->file('old_exam_file'));
-        if (! $result['ok']) {
+        if (!$result['ok']) {
             return response()->json(['ok' => false, 'message' => $result['message'] ?? 'Unable to save.'], 422);
         }
 
@@ -103,7 +103,7 @@ class ExamDraftController extends BaseApiController
         }
 
         $result = $this->adminService->review($guard, $request->validated(), $request->file('final_file'));
-        if (! $result['ok']) {
+        if (!$result['ok']) {
             return response()->json(['ok' => false, 'message' => $result['message'] ?? 'Unable to save.'], 422);
         }
 
@@ -113,6 +113,9 @@ class ExamDraftController extends BaseApiController
         ]);
     }
 
+    /**
+     * @return int|JsonResponse
+     */
     private function authenticatedUserIdOrUnauthorized(): int|JsonResponse
     {
         $userId = (int) (auth()->id() ?? 0);