fix: detect imtoken injected provider by browser

src/wallet/injected.ts

@@ -138,6 +138,11 @@ export function getInjectedEthereum(): EthereumProvider | null {
   return maybeWindow.ethereum ?? null;
 }
 
+function isImTokenBrowser(): boolean {
+  if (typeof navigator === "undefined") return false;
+  return /imtoken/i.test(navigator.userAgent || "");
+}
+
 export function getInjectedWallet(kind?: WalletKind): EthereumProvider | null {
   const ethereum = getInjectedEthereum();
   if (!ethereum || !kind) return ethereum;
@@ -150,7 +155,15 @@ export function getInjectedWallet(kind?: WalletKind): EthereumProvider | null {
     if (kind === "imToken") return provider.isImToken;
     return false;
   });
-  return match ?? null;
+  if (match) return match;
+
+  // Some imToken mobile versions inject a usable EIP-1193 provider without
+  // setting `isImToken`. Inside the imToken in-app browser, prefer the injected
+  // provider instead of falling back to WalletConnect, which can leave the UI at
+  // connected:no on China networks.
+  if (kind === "imToken" && isImTokenBrowser()) return providers[0] ?? ethereum;
+
+  return null;
 }
 
 export async function getConnectedInjectedAddress(