feat: 添加多链支持和 Lending 借贷系统

- 新增 ARB Sepolia + BNB Testnet 多链支持
- 添加 LendingPanel 借贷系统组件
- 添加 LendingAdminPanel 管理面板
- 添加 USDCPanel USDC 操作组件
- 添加 HoldersPanel 持有人信息组件
- 添加 AutoTestPanel 自动化测试组件
- 重构 LP 组件为模块化结构 (LP/)
- 添加多个调试和测试脚本
- 修复 USDC 精度动态配置
- 优化合约配置支持多链切换

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

frontend/scripts/check-withdraw-transactions.js

@@ -0,0 +1,106 @@
+import { createPublicClient, http, getAddress, keccak256, toBytes } from 'viem'
+import { arbitrumSepolia } from 'viem/chains'
+
+const client = createPublicClient({
+  chain: arbitrumSepolia,
+  transport: http('https://api.zan.top/node/v1/arb/sepolia/baf84c429d284bb5b676cb8c9ca21c07')
+})
+
+const LENDING_PROXY = getAddress('0xCb4E7B1069F6C26A1c27523ce4c8dfD884552d1D')
+const USER = getAddress('0xa013422A5918CD099C63c8CC35283EACa99a705d')
+
+// 计算函数选择器
+const withdrawSelector = keccak256(toBytes('withdraw(uint256)')).slice(0, 10)
+const supplyCollateralSelector = keccak256(toBytes('supplyCollateral(address,uint256)')).slice(0, 10)
+
+console.log('\n=== 查找用户的交易记录 ===\n')
+console.log('用户地址:', USER)
+console.log('Lending 合约:', LENDING_PROXY)
+console.log('\n函数选择器:')
+console.log('  withdraw:', withdrawSelector)
+console.log('  supplyCollateral:', supplyCollateralSelector)
+console.log()
+
+async function main() {
+  const latestBlock = await client.getBlockNumber()
+  console.log('最新区块:', latestBlock)
+  console.log('查询范围: 最近 10000 个区块\n')
+
+  // 获取用户发送到 Lending 合约的所有交易
+  const fromBlock = latestBlock - 10000n
+  const toBlock = latestBlock
+
+  console.log('=== 查找所有用户 → Lending 的交易 ===\n')
+
+  let blockNum = fromBlock
+  const transactions = []
+
+  while (blockNum <= toBlock) {
+    const endBlock = blockNum + 1000n > toBlock ? toBlock : blockNum + 1000n
+
+    try {
+      const block = await client.getBlock({
+        blockNumber: blockNum,
+        includeTransactions: true
+      })
+
+      for (const tx of block.transactions) {
+        if (typeof tx === 'object' &&
+            tx.from.toLowerCase() === USER.toLowerCase() &&
+            tx.to?.toLowerCase() === LENDING_PROXY.toLowerCase()) {
+          transactions.push({
+            hash: tx.hash,
+            blockNumber: block.number,
+            input: tx.input
+          })
+        }
+      }
+    } catch (error) {
+      // Skip blocks without transactions
+    }
+
+    blockNum += 1000n
+  }
+
+  console.log(`找到 ${transactions.length} 笔交易\n`)
+
+  if (transactions.length === 0) {
+    console.log('没有找到任何交易')
+    return
+  }
+
+  // 分析每笔交易
+  for (const tx of transactions) {
+    console.log('---')
+    console.log('交易哈希:', tx.hash)
+    console.log('区块:', tx.blockNumber.toString())
+
+    const selector = tx.input.slice(0, 10)
+    console.log('函数选择器:', selector)
+
+    let functionName = '未知'
+    if (selector === withdrawSelector) {
+      functionName = 'withdraw (借款/提取)'
+      // 解析参数 (uint256)
+      const amountHex = '0x' + tx.input.slice(10)
+      const amount = BigInt(amountHex)
+      console.log('调用函数:', functionName)
+      console.log('金额:', Number(amount) / 1e6, 'USDC')
+    } else if (selector === supplyCollateralSelector) {
+      functionName = 'supplyCollateral (存入抵押品)'
+      // 解析参数 (address, uint256)
+      const assetAddress = '0x' + tx.input.slice(34, 74)
+      const amountHex = '0x' + tx.input.slice(74)
+      const amount = BigInt(amountHex)
+      console.log('调用函数:', functionName)
+      console.log('资产:', getAddress(assetAddress))
+      console.log('金额:', Number(amount) / 1e18)
+    } else {
+      console.log('调用函数:', functionName, '-', selector)
+    }
+
+    console.log()
+  }
+}
+
+main().catch(console.error)