chore: 账户设置与杂项修复

- BlockchainService: 新增 isProxyDeployed、getUsdcAllowance（账户设置检查/授权用）
- RetrofitFactory: 移除 RPC URL 替换 debug 日志
- AccountImportForm: 修复 checkSetupStatus/onSuccess 参数类型（使用 newAccount.id）
- AccountSetupStatusBlock: 移除未使用的 isMobile 与 useMediaQuery 引用

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/src/main/kotlin/com/wrbug/polymarketbot/service/common/BlockchainService.kt

@@ -248,6 +248,62 @@ class BlockchainService(
         }
     }
 
+    /**
+     * 检查代理钱包是否已部署（链上有合约代码）
+     * @param proxyAddress 代理钱包地址
+     * @return 已部署返回 true
+     */
+    suspend fun isProxyDeployed(proxyAddress: String): Boolean {
+        if (proxyAddress.isBlank() || !proxyAddress.startsWith("0x") || proxyAddress.length != 42) {
+            return false
+        }
+        return isContract(proxyAddress)
+    }
+
+    /**
+     * 查询 ERC20 USDC 授权额度 allowance(owner, spender)
+     * @param owner 代币持有者地址（代理钱包地址）
+     * @param spender 被授权方地址（如 CTF Exchange）
+     * @return 授权额度（原始值，USDC 为 6 位小数，需除以 1e6 为显示值）
+     */
+    suspend fun getUsdcAllowance(owner: String, spender: String): Result<BigInteger> {
+        return try {
+            if (owner.isBlank() || spender.isBlank()) {
+                return Result.failure(IllegalArgumentException("owner 或 spender 不能为空"))
+            }
+            val rpcApi = polygonRpcApi
+            // ERC20 allowance(address owner, address spender) 选择器
+            val functionSelector = "0xdd62ed3e"
+            val ownerEncoded = EthereumUtils.encodeAddress(owner)
+            val spenderEncoded = EthereumUtils.encodeAddress(spender)
+            val data = functionSelector + ownerEncoded + spenderEncoded
+            val rpcRequest = JsonRpcRequest(
+                method = "eth_call",
+                params = listOf(
+                    mapOf(
+                        "to" to usdcContractAddress,
+                        "data" to data
+                    ),
+                    "latest"
+                )
+            )
+            val response = rpcApi.call(rpcRequest)
+            if (!response.isSuccessful || response.body() == null) {
+                return Result.failure(Exception("RPC 请求失败: ${response.code()} ${response.message()}"))
+            }
+            val rpcResponse = response.body()!!
+            if (rpcResponse.error != null) {
+                return Result.failure(Exception("RPC 错误: ${rpcResponse.error.message}"))
+            }
+            val hexResult = rpcResponse.result?.asString ?: return Result.failure(Exception("RPC 响应 result 为空"))
+            val allowance = EthereumUtils.decodeUint256(hexResult)
+            Result.success(allowance)
+        } catch (e: Exception) {
+            logger.warn("查询 USDC 授权额度失败: ${e.message}")
+            Result.failure(e)
+        }
+    }
+    
     /**
      * 查询账户 USDC 余额
      * 通过 Polygon RPC 查询 ERC-20 代币余额

backend/src/main/kotlin/com/wrbug/polymarketbot/util/RetrofitFactory.kt

@@ -400,8 +400,6 @@ class RpcUrlReplaceInterceptor(
     private val fixedBaseUrl: String,
     private val actualRpcUrl: String
 ) : Interceptor {
-    private val logger = LoggerFactory.getLogger(RpcUrlReplaceInterceptor::class.java)
-    
     @Throws(IOException::class)
     override fun intercept(chain: Interceptor.Chain): Response {
         val originalRequest = chain.request()
@@ -415,8 +413,6 @@ class RpcUrlReplaceInterceptor(
         val newUrl = newUrlString.toHttpUrlOrNull()
             ?: throw IllegalArgumentException("无效的 RPC URL: $newUrlString")
         
-        logger.debug("RPC URL 替换: $originalUrlString -> $newUrlString")
-        
         val newRequest = originalRequest.newBuilder()
             .url(newUrl)
             .build()

frontend/src/components/AccountImportForm.tsx

@@ -269,7 +269,7 @@ const AccountImportForm: React.FC<AccountImportFormProps> = ({
           // 检查账户设置状态
           let willShowSetupModal = false
           try {
-            const setupResponse = await apiService.accounts.checkSetupStatus(accountId)
+            const setupResponse = await apiService.accounts.checkSetupStatus(newAccount.id)
             if (setupResponse.data.code === 0 && setupResponse.data.data) {
               const status = setupResponse.data.data
               setSetupStatus(status)
@@ -284,7 +284,7 @@ const AccountImportForm: React.FC<AccountImportFormProps> = ({
           }
           // 未展示设置弹窗时才调用 onSuccess，避免父组件关闭导入弹窗导致设置弹窗被卸载
           if (!willShowSetupModal && onSuccess) {
-            onSuccess(accountId)
+            onSuccess(newAccount.id)
           }
         } else if (onSuccess) {
           onSuccess(0)

frontend/src/components/AccountSetupStatusBlock.tsx

@@ -10,7 +10,6 @@ import {
   ReloadOutlined
 } from '@ant-design/icons'
 import { useTranslation } from 'react-i18next'
-import { useMediaQuery } from 'react-responsive'
 import { apiService } from '../services/api'
 
 const { Paragraph, Text } = Typography
@@ -47,7 +46,6 @@ const AccountSetupStatusBlock: React.FC<AccountSetupStatusBlockProps> = ({
   embedded = false
 }) => {
   const { t } = useTranslation()
-  const isMobile = useMediaQuery({ maxWidth: 768 })
   const [setupStatus, setSetupStatus] = useState<SetupStatus | null>(null)
   const [loading, setLoading] = useState(true)
   const [refreshing, setRefreshing] = useState(false)