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-token-transfers.js

@@ -0,0 +1,108 @@
+import { createPublicClient, http, getAddress } from 'viem'
+import { arbitrumSepolia } from 'viem/chains'
+
+const client = createPublicClient({
+  chain: arbitrumSepolia,
+  transport: http('https://api.zan.top/node/v1/arb/sepolia/baf84c429d284bb5b676cb8c9ca21c07')
+})
+
+const YT_A = getAddress('0x97204190B35D9895a7a47aa7BaC61ac08De3cF05')
+const LENDING_PROXY = getAddress('0xCb4E7B1069F6C26A1c27523ce4c8dfD884552d1D')
+const USER = getAddress('0xa013422A5918CD099C63c8CC35283EACa99a705d')
+
+const TRANSFER_EVENT = {
+  type: 'event',
+  name: 'Transfer',
+  inputs: [
+    { indexed: true, name: 'from', type: 'address' },
+    { indexed: true, name: 'to', type: 'address' },
+    { indexed: false, name: 'value', type: 'uint256' }
+  ]
+}
+
+async function main() {
+  console.log('\n检查 YT-A 代币转账...  \n')
+
+  const latestBlock = await client.getBlockNumber()
+  console.log('最新区块:', latestBlock)
+  console.log('查询范围: 最近 1000 个区块\n')
+
+  try {
+    // 检查转入 Lending 合约的 Transfer
+    console.log('--- 1. 查找转入 Lending 合约的转账 ---')
+    const logsTo = await client.getLogs({
+      address: YT_A,
+      event: TRANSFER_EVENT,
+      args: {
+        to: LENDING_PROXY
+      },
+      fromBlock: latestBlock - 1000n,
+      toBlock: latestBlock
+    })
+
+    if (logsTo.length === 0) {
+      console.log('✗ 未找到任何转入 Lending 合约的转账\n')
+    } else {
+      console.log('✓ 找到', logsTo.length, '笔转入记录:\n')
+      logsTo.forEach((log, i) => {
+        const { from, to, value } = log.args
+        const isFromUser = from.toLowerCase() === USER.toLowerCase()
+        console.log((i + 1) + '. 区块', log.blockNumber)
+        console.log('   交易:', log.transactionHash)
+        console.log('   From:', from, isFromUser ? '<- 你的地址' : '')
+        console.log('   To:', to)
+        console.log('   Amount:', Number(value) / 1e18, 'YT-A')
+        console.log()
+      })
+    }
+
+    // 检查从用户发出的 Transfer
+    console.log('--- 2. 查找从你的地址发出的转账 ---')
+    const logsFrom = await client.getLogs({
+      address: YT_A,
+      event: TRANSFER_EVENT,
+      args: {
+        from: USER
+      },
+      fromBlock: latestBlock - 1000n,
+      toBlock: latestBlock
+    })
+
+    if (logsFrom.length === 0) {
+      console.log('✗ 未找到任何从你地址发出的转账\n')
+    } else {
+      console.log('✓ 找到', logsFrom.length, '笔转出记录:\n')
+      logsFrom.forEach((log, i) => {
+        const { from, to, value } = log.args
+        const isToLending = to.toLowerCase() === LENDING_PROXY.toLowerCase()
+        console.log((i + 1) + '. 区块', log.blockNumber)
+        console.log('   交易:', log.transactionHash)
+        console.log('   From:', from)
+        console.log('   To:', to, isToLending ? '<- Lending 合约' : '')
+        console.log('   Amount:', Number(value) / 1e18, 'YT-A')
+        console.log()
+      })
+    }
+
+    // 检查用户的 YT-A 余额
+    console.log('--- 3. 检查当前 YT-A 余额 ---')
+    const balance = await client.readContract({
+      address: YT_A,
+      abi: [{
+        inputs: [{ internalType: 'address', name: 'account', type: 'address' }],
+        name: 'balanceOf',
+        outputs: [{ internalType: 'uint256', name: '', type: 'uint256' }],
+        stateMutability: 'view',
+        type: 'function'
+      }],
+      functionName: 'balanceOf',
+      args: [USER]
+    })
+    console.log('你的 YT-A 余额:', Number(balance) / 1e18, '\n')
+
+  } catch (error) {
+    console.error('查询失败:', error.message)
+  }
+}
+
+main()