fix: 隔离门户待办身份并取消旧请求（09-11-reimbursement-payment-handoffs）

client/src/pages/MobilePortalPage.tsx

@@ -128,9 +128,9 @@ export function MobilePortalPage() {
   });
 
   const portalHomeQuery = useQuery({
-    enabled: canUseFinance,
-    queryKey: ["mobile", "portal", "home"],
-    queryFn: () => fetchPortalHome(),
+    enabled: Boolean(me?.id),
+    queryKey: ["mobile", "portal", "home", me?.id],
+    queryFn: ({ signal }) => fetchPortalHome(signal),
     staleTime: 0,
     refetchOnMount: true,
     refetchOnWindowFocus: true,