feat: 添加WebSocket票据认证和钱包类型支持

- 新增WebSocket票据服务，用于短期有效的WebSocket连接认证
- 支持Magic和Safe两种钱包类型，分别对应邮箱/OAuth登录和MetaMask用户
- 添加登录频率限制和安全防护
- 优化日志记录，屏蔽敏感信息
- 升级ethers.js到v6.16.0
- 新增多语言钱包类型说明
- 重构代理地址计算逻辑，支持CREATE2计算Magic代理地址

frontend/src/locales/en/common.json

@@ -199,7 +199,11 @@
     "importFailed": "Failed to import account",
     "derivedAddress": "Derived Address",
     "addressError": "Cannot derive address from private key",
-    "addressErrorMnemonic": "Cannot derive address from mnemonic"
+    "addressErrorMnemonic": "Cannot derive address from mnemonic",
+    "walletType": "Wallet Type",
+    "walletTypeHelp": "Magic: Polymarket accounts logged in via email or social accounts (Google, Twitter, etc.); MetaMask: Polymarket accounts connected via browser wallets like MetaMask",
+    "walletTypeMagic": "Magic (Email/Social Login)",
+    "walletTypeSafe": "MetaMask (Browser Wallet)"
   },
   "leader": {
     "title": "Leader Management",

frontend/src/locales/zh-CN/common.json

@@ -199,7 +199,11 @@
     "importFailed": "导入账户失败",
     "derivedAddress": "推导地址",
     "addressError": "无法从私钥推导地址",
-    "addressErrorMnemonic": "无法从助记词推导地址"
+    "addressErrorMnemonic": "无法从助记词推导地址",
+    "walletType": "钱包类型",
+    "walletTypeHelp": "Magic：通过邮箱或社交账号（如 Google、Twitter）登录的 Polymarket 账户；MetaMask：使用 MetaMask 等浏览器钱包连接的 Polymarket 账户",
+    "walletTypeMagic": "Magic（邮箱/社交账号登录）",
+    "walletTypeSafe": "MetaMask（浏览器钱包）"
   },
   "leader": {
     "title": "Leader 管理",

frontend/src/locales/zh-TW/common.json

@@ -199,7 +199,11 @@
     "importFailed": "導入賬戶失敗",
     "derivedAddress": "推導地址",
     "addressError": "無法從私鑰推導地址",
-    "addressErrorMnemonic": "無法從助記詞推導地址"
+    "addressErrorMnemonic": "無法從助記詞推導地址",
+    "walletType": "錢包類型",
+    "walletTypeHelp": "Magic：透過郵箱或社群帳號（如 Google、Twitter）登入的 Polymarket 帳戶；MetaMask：使用 MetaMask 等瀏覽器錢包連接的 Polymarket 帳戶",
+    "walletTypeMagic": "Magic（郵箱/社群帳號登入）",
+    "walletTypeSafe": "MetaMask（瀏覽器錢包）"
   },
   "leader": {
     "title": "Leader 管理",