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-all-balances.ts

@@ -0,0 +1,30 @@
+import { createPublicClient, http, formatEther } from 'viem'
+import { arbitrumSepolia } from 'viem/chains'
+import { mnemonicToAccount } from 'viem/accounts'
+
+const client = createPublicClient({
+  chain: arbitrumSepolia,
+  transport: http('https://sepolia-rollup.arbitrum.io/rpc'),
+})
+
+const MAIN_ADDRESS = '0xa013422A5918CD099C63c8CC35283EACa99a705d'
+const TEST_MNEMONIC = 'test test test test test test test test test test test junk'
+
+async function main() {
+  console.log('📊 所有账户 ETH 余额:\n')
+
+  // 主账户
+  const mainBalance = await client.getBalance({ address: MAIN_ADDRESS })
+  console.log(`主账户: ${MAIN_ADDRESS}`)
+  console.log(`  ETH: ${formatEther(mainBalance)}\n`)
+
+  // 测试账户
+  console.log('测试账户:')
+  for (let i = 0; i < 5; i++) {
+    const account = mnemonicToAccount(TEST_MNEMONIC, { addressIndex: i })
+    const balance = await client.getBalance({ address: account.address })
+    console.log(`  ${i + 1}. ${account.address}: ${formatEther(balance)} ETH`)
+  }
+}
+
+main()