fix wallet verify proxy resilience

frontend/components/account/__tests__/paymentSecurity.test.ts

@@ -243,10 +243,30 @@ export function runTests() {
     walletChallengeRouteSource.includes("retryable: true"),
     "wallet challenge proxy exception response must mark transient failures as retryable",
   );
+  const walletVerifyRouteSource = fs.readFileSync(
+    path.join(projectRoot, "app/api/payments/wallets/verify/route.ts"),
+    "utf8",
+  );
+  assert(
+    walletVerifyRouteSource.includes("fetchWalletVerifyWithRetry"),
+    "wallet verify proxy must retry a transient backend connection failure before blocking wallet binding",
+  );
+  assert(
+    walletVerifyRouteSource.includes("Invalid wallet verify request"),
+    "wallet verify proxy must return a client error for malformed JSON instead of a generic payment failure",
+  );
+  assert(
+    walletVerifyRouteSource.includes("retryable: true"),
+    "wallet verify proxy exception response must mark transient failures as retryable",
+  );
   assert(
     walletBindSource.includes("readPaymentApiErrorMessage"),
     "wallet binding errors must show the API error message instead of raw JSON",
   );
+  assert(
+    walletBindSource.includes("钱包验证服务暂时不可用"),
+    "wallet binding HTML/50x fallback should stay localized in the Chinese account UI",
+  );
   assert(
     paymentUtilsSource.includes("looksLikeHtmlDocument") &&
       paymentUtilsSource.includes("Payment service is temporarily unavailable") &&

frontend/components/account/useWalletBind.ts

@@ -304,7 +304,12 @@ export function useWalletBind(params: UseWalletBindParams) {
         method: "POST", headers: authHeaders, body: JSON.stringify({ address }),
       });
       if (!challengeRes.ok) {
-        const message = await readPaymentApiErrorMessage(challengeRes);
+        const message = await readPaymentApiErrorMessage(
+          challengeRes,
+          isEn
+            ? "Wallet challenge service is temporarily unavailable."
+            : "钱包验证服务暂时不可用。",
+        );
         throw new Error(copy.challengeFailed.replace("{raw}", message));
       }
 
@@ -318,7 +323,12 @@ export function useWalletBind(params: UseWalletBindParams) {
         method: "POST", headers: authHeaders, body: JSON.stringify({ address, nonce, signature }),
       });
       if (!verifyRes.ok) {
-        const message = await readPaymentApiErrorMessage(verifyRes);
+        const message = await readPaymentApiErrorMessage(
+          verifyRes,
+          isEn
+            ? "Wallet verify service is temporarily unavailable."
+            : "钱包验证服务暂时不可用。",
+        );
         throw new Error(copy.verifyFailedRaw.replace("{raw}", message));
       }