feat: 添加 LP 流动性池功能

新增功能:
- 添加 LPPanel 组件，支持流动性池操作
- 添加流动性 (addLiquidity): 存入 YT 代币或 WUSD 获得 ytLP
- 移除流动性 (removeLiquidity): 销毁 ytLP 获取代币
- 代币互换 (swapYT): 在池内交换 YT 代币

合约集成:
- YTRewardRouter: 0x51eEF57eC57c867AC23945f0ce21aA5A9a2C246c
- YTLPToken: 0x1b96F219E8aeE557DD8bD905a6c72cc64eA5BD7B
- YTPoolManager: 0x14246886a1E1202cb6b5a2db793eF3359d536302
- YTVault: 0x19982e5145ca5401A1084c0BF916c0E0bB343Af9
- USDY: 0x631Bd6834C50f6d2B07035c9253b4a19132E888c

UI功能:
- 显示池子 AUM、ytLP 价格、总供应量
- 显示用户 ytLP 余额和冷却时间
- Tab 切换: 添加流动性/移除流动性/代币互换
- 代币授权检查和一键授权
- 滑点容忍度设置
- 中英文翻译支持

🤖 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

@@ -18,7 +18,8 @@
   "nav": {
     "wusd": "WUSD",
     "vaultTrading": "金库交易",
-    "factory": "工厂管理"
+    "factory": "工厂管理",
+    "lpPool": "LP 流动池"
   },
   "header": {
     "title": "YT 资产测试"
@@ -147,5 +148,36 @@
     "updatePriceNotOwnerDesc": "非 Owner 调用 updateVaultPrices",
     "setManagerNotOwner": "设置Manager(非Owner)",
     "setManagerNotOwnerDesc": "非 Owner 调用 setVaultManager"
+  },
+  "lp": {
+    "title": "YT 流动性池",
+    "rewardRouter": "奖励路由合约",
+    "ytLPToken": "ytLP 代币",
+    "poolAUM": "池子总资产(AUM)",
+    "ytLPPrice": "ytLP 价格",
+    "totalSupply": "总供应量",
+    "yourBalance": "你的余额",
+    "cooldownRemaining": "冷却时间剩余",
+    "noCooldown": "无冷却",
+    "addLiquidity": "添加流动性",
+    "addLiquidityDesc": "存入 YT 代币或 WUSD 获得 ytLP 凭证",
+    "removeLiquidity": "移除流动性",
+    "removeLiquidityDesc": "销毁 ytLP 获取代币",
+    "swapTokens": "代币互换",
+    "swapDesc": "在池内交换 YT 代币和 WUSD",
+    "selectToken": "选择代币",
+    "amount": "数量",
+    "slippage": "滑点容忍度",
+    "approveToken": "授权代币",
+    "approveYtLP": "授权 ytLP",
+    "outputToken": "输出代币",
+    "ytLPAmount": "ytLP 数量",
+    "max": "最大",
+    "fromToken": "输入代币",
+    "toToken": "输出代币",
+    "swap": "交换",
+    "cooldownNotPassed": "冷却期未过，请稍后再试",
+    "insufficientOutput": "输出金额不足",
+    "cooldownWarning": "冷却期剩余 {{time}}，暂时无法移除流动性"
   }
 }