added download button for orignal import csv file

app/Http/Controllers/ImportController.php

@@ -9,7 +9,6 @@
 use App\Models\ImportEvent;
 use App\Models\ImportTemplate;
 use App\Services\CsvImportService;
-use App\Services\Import\ImportServiceV2;
 use App\Services\Import\ImportSimulationServiceV2;
 use App\Services\ImportProcessor;
 use Illuminate\Http\Request;
@@ -187,9 +186,10 @@ public function store(Request $request)
     public function process(Import $import, Request $request, ImportProcessor $processor)
     {
         $import->update(['status' => 'validating', 'started_at' => now()]);
-        
+
         try {
             $result = $processor->process($import, user: $request->user());
+
             return response()->json($result);
         } catch (\Throwable $e) {
             \Log::error('Import processing failed', [
@@ -197,12 +197,12 @@ public function process(Import $import, Request $request, ImportProcessor $proce
                 'error' => $e->getMessage(),
                 'trace' => $e->getTraceAsString(),
             ]);
-            
+
             $import->update(['status' => 'failed']);
-            
+
             return response()->json([
                 'success' => false,
-                'message' => 'Import processing failed: ' . $e->getMessage(),
+                'message' => 'Import processing failed: '.$e->getMessage(),
             ], 500);
         }
     }
@@ -712,8 +712,6 @@ public function simulatePayments(Import $import, Request $request)
      * templates. For payments templates, payment-specific summaries/entities will be included
      * automatically by the simulation service when mappings contain the payment root.
      *
-     * @param  Import  $import
-     * @param  Request  $request
      * @return \Illuminate\Http\JsonResponse
      */
     public function simulate(Import $import, Request $request)
@@ -829,4 +827,19 @@ public function destroy(Request $request, Import $import)
 
         return back()->with('success', 'Import deleted successfully');
     }
+
+    // Download the original import file
+    public function download(Import $import)
+    {
+        // Verify file exists
+        if (! $import->disk || ! $import->path || ! Storage::disk($import->disk)->exists($import->path)) {
+            return response()->json([
+                'error' => 'File not found',
+            ], 404);
+        }
+
+        $fileName = $import->original_name ?? 'import_'.$import->uuid;
+
+        return Storage::disk($import->disk)->download($import->path, $fileName);
+    }
 }