feat: 添加 YT Asset 合约测试前端

- React + TypeScript + Vite 项目结构
- WalletConnect 钱包连接功能
- WUSD 铸造页面（含边界测试）
- Vault 交易页面（买入/卖出 YT，含边界测试）
- Factory 管理页面（创建 Vault、更新价格，含权限测试）
- 中英文国际化支持
- 显示 Owner/Manager 角色信息

🤖 Generated with [Claude Code](https://claude.com/claude-code)

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

frontend/src/i18n/locales/zh.json

@@ -0,0 +1,135 @@
+{
+  "common": {
+    "connectWallet": "连接钱包",
+    "disconnect": "断开连接",
+    "processing": "处理中...",
+    "confirm": "确认",
+    "cancel": "取消",
+    "loading": "加载中...",
+    "success": "成功!",
+    "error": "错误",
+    "balance": "余额",
+    "amount": "数量",
+    "contract": "合约",
+    "address": "地址",
+    "network": "Arbitrum Sepolia",
+    "connectFirst": "请先连接钱包"
+  },
+  "nav": {
+    "wusd": "WUSD",
+    "vaultTrading": "金库交易",
+    "factory": "工厂管理"
+  },
+  "header": {
+    "title": "YT 资产测试"
+  },
+  "footer": {
+    "description": "YT 资产合约测试界面"
+  },
+  "wusd": {
+    "title": "WUSD 代币",
+    "mintAmount": "铸造数量",
+    "enterAmount": "输入铸造数量",
+    "mint": "铸造 WUSD",
+    "minting": "铸造中...",
+    "confirming": "确认中...",
+    "mintSuccess": "铸造成功!"
+  },
+  "vault": {
+    "title": "金库交易",
+    "selectVault": "选择金库",
+    "vaultInfo": "金库信息",
+    "totalAssets": "总资产",
+    "idleAssets": "闲置资产",
+    "totalSupply": "总供应量",
+    "hardCap": "硬顶",
+    "wusdPrice": "WUSD 价格",
+    "ytPrice": "YT 价格",
+    "yourWusdBalance": "你的 WUSD 余额",
+    "yourYtBalance": "你的 YT 余额",
+    "buyYt": "买入 YT",
+    "sellYt": "卖出 YT",
+    "wusdAmount": "WUSD 数量",
+    "ytAmount": "YT 数量",
+    "enterWusdAmount": "输入 WUSD 数量",
+    "enterYtAmount": "输入 YT 数量",
+    "youWillReceive": "你将收到",
+    "approveWusd": "授权 WUSD",
+    "buy": "买入 YT",
+    "sell": "卖出 YT"
+  },
+  "factory": {
+    "title": "工厂管理",
+    "factoryContract": "工厂合约",
+    "owner": "所有者",
+    "defaultHardCap": "默认硬顶",
+    "totalVaults": "金库总数",
+    "yourRole": "你的角色",
+    "roleOwner": "所有者",
+    "roleUser": "用户",
+    "allVaults": "所有金库",
+    "noVaults": "暂无金库",
+    "createVault": "创建新金库",
+    "name": "名称",
+    "symbol": "符号",
+    "managerAddress": "管理员地址",
+    "redemptionTime": "赎回时间",
+    "initialWusdPrice": "初始 WUSD 价格",
+    "initialYtPrice": "初始 YT 价格",
+    "create": "创建金库",
+    "updatePrices": "更新金库价格",
+    "vaultAddress": "金库地址",
+    "selectVault": "选择金库",
+    "newWusdPrice": "新 WUSD 价格",
+    "newYtPrice": "新 YT 价格",
+    "update": "更新价格"
+  },
+  "language": {
+    "en": "英文",
+    "zh": "中文"
+  },
+  "test": {
+    "title": "边界测试",
+    "currentStatus": "当前状态",
+    "canRedeem": "可赎回",
+    "timeToRedeem": "赎回倒计时",
+    "hardCap": "硬顶",
+    "role": "你的角色",
+    "yes": "是",
+    "no": "否",
+    "customAmount": "自定义金额",
+    "transferAddress": "转账地址",
+    "boundaryTests": "边界测试",
+    "boundaryHint": "这些测试旨在触发合约错误。每个测试都显示了预期的错误。",
+    "permissionTests": "权限测试",
+    "permissionHint": "测试权限限制。如果你不是 Owner/Manager 应该会失败。",
+    "managerTests": "Manager 功能",
+    "managerHint": "仅限 Manager 的功能。当前 Manager: ",
+    "normalTests": "正常功能",
+    "quickActions": "快速操作",
+    "run": "执行",
+    "running": "执行中...",
+    "mint10000": "铸造 10000 WUSD",
+    "maxApprove": "最大授权 WUSD",
+    "buyZero": "买入金额为0",
+    "buyZeroDesc": "测试 depositYT(0)",
+    "sellZero": "卖出金额为0",
+    "sellZeroDesc": "测试 withdrawYT(0)",
+    "buyExceedBalance": "买入超过余额",
+    "buyExceedBalanceDesc": "买入金额超过 WUSD 余额",
+    "sellExceedBalance": "卖出超过余额",
+    "sellExceedBalanceDesc": "卖出金额超过 YT 余额",
+    "buyExceedHardcap": "买入超过硬顶",
+    "buyExceedHardcapDesc": "买入金额超过 Vault 硬顶",
+    "sellInLock": "锁定期卖出",
+    "sellInLockDesc": "在锁定期内尝试卖出",
+    "mintZero": "铸造金额为0",
+    "mintZeroDesc": "测试 mint(0)",
+    "burnExceed": "销毁超过余额",
+    "burnExceedDesc": "销毁金额超过余额",
+    "updatePriceNotOwner": "更新价格(非Owner)",
+    "updatePriceNotOwnerDesc": "非 Owner 调用 updateVaultPrices",
+    "setManagerNotOwner": "设置Manager(非Owner)",
+    "setManagerNotOwnerDesc": "非 Owner 调用 setVaultManager"
+  }
+}