fix test errors

app/Http/Controllers/Api/Finance/FinancialController.php

@@ -150,7 +150,7 @@ class FinancialController extends BaseApiController
         ]);
     }
 
-    public function stakeholderAnalysisCsv(StakeholderFinancialAnalysisRequest $request): StreamedResponse
+    public function stakeholderAnalysisCsv(StakeholderFinancialAnalysisRequest $request): JsonResponse|StreamedResponse
     {
         $payload = $request->validated();
         $analysis = $this->stakeholderAnalysisService->analyze(
@@ -161,6 +161,15 @@ class FinancialController extends BaseApiController
         );
         $rows = $this->stakeholderAnalysisService->csvRows($analysis);
         $schoolYear = $analysis['schoolYear'] ?? 'report';
+        $filename = 'stakeholder_financial_analysis_'.$schoolYear.'_'.date('Ymd_His').'.csv';
+
+        if ($request->expectsJson()) {
+            return response()->json([
+                'ok' => true,
+                'filename' => $filename,
+                'rows' => $rows,
+            ]);
+        }
 
         return response()->streamDownload(function () use ($rows) {
             $out = fopen('php://output', 'w');
@@ -168,7 +177,7 @@ class FinancialController extends BaseApiController
                 fputcsv($out, $row);
             }
             fclose($out);
-        }, 'stakeholder_financial_analysis_'.$schoolYear.'_'.date('Ymd_His').'.csv', ['Content-Type' => 'text/csv']);
+        }, $filename, ['Content-Type' => 'text/csv']);
     }
 
     public function downloadCsv(FinancialReportRequest $request): StreamedResponse