feat:가망고객 상태 토글 기능 추가 (영업중 ↔ 완료)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

app/Http/Controllers/Sales/AdminProspectController.php

@@ -209,6 +209,7 @@ private function getIndexData(Request $request): array
             'active' => TenantProspect::where('status', TenantProspect::STATUS_ACTIVE)->count(),
             'expired' => TenantProspect::where('status', TenantProspect::STATUS_EXPIRED)->count(),
             'converted' => TenantProspect::where('status', TenantProspect::STATUS_CONVERTED)->count(),
+            'completed' => TenantProspect::where('status', TenantProspect::STATUS_COMPLETED)->count(),
             'progress_complete' => $progressCompleteCount,
         ];
 
@@ -334,6 +335,34 @@ public function updateCommissionDate(int $id, Request $request)
         return response()->json($response);
     }
 
+    /**
+     * 상태 토글 (영업중 ↔ 완료)
+     */
+    public function toggleStatus(int $id)
+    {
+        $this->checkAdminAccess();
+
+        $prospect = TenantProspect::findOrFail($id);
+
+        if ($prospect->status === TenantProspect::STATUS_ACTIVE) {
+            $prospect->update(['status' => TenantProspect::STATUS_COMPLETED]);
+        } elseif ($prospect->status === TenantProspect::STATUS_COMPLETED) {
+            $prospect->update(['status' => TenantProspect::STATUS_ACTIVE]);
+        } else {
+            return response()->json([
+                'success' => false,
+                'message' => '영업중 또는 완료 상태만 변경할 수 있습니다.',
+            ], 422);
+        }
+
+        return response()->json([
+            'success' => true,
+            'status' => $prospect->status,
+            'status_label' => $prospect->status_label,
+            'status_color' => $prospect->status_color,
+        ]);
+    }
+
     /**
      * 가망고객 삭제 (슈퍼관리자 전용)
      */