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-collateral-balance.js

@@ -0,0 +1,55 @@
+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 LENDING_PROXY = getAddress('0xCb4E7B1069F6C26A1c27523ce4c8dfD884552d1D')
+const YT_A = getAddress('0x97204190B35D9895a7a47aa7BaC61ac08De3cF05')
+const USER = getAddress('0xa013422A5918CD099C63c8CC35283EACa99a705d')
+
+const LENDING_ABI = [
+  {
+    inputs: [
+      { internalType: 'address', name: '_user', type: 'address' },
+      { internalType: 'address', name: '_collateralAsset', type: 'address' }
+    ],
+    name: 'getUserCollateral',
+    outputs: [{ internalType: 'uint256', name: '', type: 'uint256' }],
+    stateMutability: 'view',
+    type: 'function'
+  }
+]
+
+async function main() {
+  console.log('\n检查抵押品余额...\n')
+  console.log('用户:', USER)
+  console.log('抵押品:', YT_A)
+
+  try {
+    const collateralBalance = await client.readContract({
+      address: LENDING_PROXY,
+      abi: LENDING_ABI,
+      functionName: 'getUserCollateral',
+      args: [USER, YT_A]
+    })
+
+    console.log('\n✓ 抵押品余额:', Number(collateralBalance) / 1e18, 'YT-A')
+    
+    if (collateralBalance > 0n) {
+      console.log('\n成功！代币已存入合约作为抵押品。')
+    } else {
+      console.log('\n警告：抵押品余额为 0，但钱包代币已被扣除。')
+      console.log('可能原因：')
+      console.log('1. 交易失败但代币被锁在某处')
+      console.log('2. 函数调用错误，需要检查交易哈希')
+    }
+
+  } catch (error) {
+    console.error('\n✗ 读取失败:', error.message)
+  }
+}
+
+main()