修复 paymentShell 测试断言，匹配移除 Matic 后的新文案

Tested: npm run test:business (20/20)

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

@@ -74,9 +74,9 @@ export function runTests() {
     "Binance extension binding must show a WalletConnect fallback hint for payment stability",
   );
   assert(
-    accountCenterSource.includes("钱包里需要少量 Polygon POL/MATIC 作为 gas 手续费") &&
+    accountCenterSource.includes("钱包里需要少量 POL 作为 gas 手续费") &&
       accountCenterSource.includes("只有 USDC 可能无法完成授权或支付"),
-    "payment wallet tab must warn users that Polygon POL/MATIC gas is required in addition to USDC",
+    "payment wallet tab must warn users that Polygon POL gas is required in addition to USDC",
   );
   assert(
     !appAnalyticsSource.includes('NEXT_PUBLIC_POLYWEATHER_APP_ANALYTICS === "true"') &&