fix: 总运营卡片增加挂靠数量显示（挂X）

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/App.tsx

@@ -502,7 +502,7 @@ export default function App() {
                   <div className="text-[9px] text-gray-400 font-medium uppercase leading-none mb-0.5">总运营</div>
                   <div className="flex items-baseline gap-1">
                     <span className="text-base font-bold text-blue-600 leading-none">{SUMMARY.operating.total}</span>
-                    <span className="text-[8px] text-gray-400 leading-none">自{SUMMARY.operating.self} 租{SUMMARY.operating.leased}</span>
+                    <span className="text-[8px] text-gray-400 leading-none">自{SUMMARY.operating.self} 租{SUMMARY.operating.leased}{SUMMARY.operating.hanging > 0 && ` 挂${SUMMARY.operating.hanging}`}</span>
                   </div>
                 </div>
               </div>