fix: the capacity api sometimes throws error

src/hooks/query/useCapacity.ts

@@ -1,9 +1,17 @@
 import { useQuery } from '@tanstack/react-query';
+import { HexNumber } from '@ckb-lumos/base';
 
-export function useCapacity(address: string) {
-  const { data, isLoading } = useQuery({
+export function useCapacity(address: string, defaultValue?: HexNumber) {
+  const { data, isLoading } = useQuery<HexNumber | undefined>({
     queryKey: ['capacity', address],
-    queryFn: async () => fetch(`/api/capacity/${address}`).then((res) => res.text()),
+    queryFn: async (): Promise<string | undefined> => {
+      try {
+        const res = await fetch(`/api/capacity/${address}`);
+        return await res.text();
+      } catch {
+        return defaultValue ?? void 0;
+      }
+    },
     enabled: !!address,
   });
   return {