fix: 修复交易统计和L2认证问题

- 修复交易统计数据计算逻辑（总订单数、已完成订单数、持仓数量）
- 修复L2认证签名生成，支持URL-safe base64格式的secret
- 添加标准HTTP请求头以匹配clob-client行为
- 移除数据库加密（私人应用，明文存储）
- 添加自动获取API Key功能
- 优化持仓数量统计（包括正负仓位）
- 添加EIP-712签名和L1认证支持
- 更新前端账户管理界面

polymarket-demo/.gitignore

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+node_modules/
+dist/
+*.log
+.env
+.DS_Store
+

polymarket-demo/README.md

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+# Polymarket JS SDK Demo
+
+这是一个用于测试 Polymarket JS SDK 的演示目录。
+
+## 安装依赖
+
+```bash
+npm install
+```
+
+或者使用 yarn:
+
+```bash
+yarn install
+```
+
+## 配置
+
+在使用脚本之前，需要修改 `src/createOrder.ts` 文件中的以下配置：
+
+1. **funder**: 你的 Polymarket 账户地址（在个人资料图片下方显示的地址）
+2. **signer**: 你的私钥
+   - 如果使用邮箱登录，从 https://reveal.magic.link/polymarket 导出
+   - 如果使用 Web3 应用，从你的钱包导出
+3. **tokenID**: 要交易的代币 ID
+   - 使用 https://docs.polymarket.com/developers/gamma-markets-api/get-markets 获取示例代币
+   - 示例代币: `114304586861386186441621124384163963092522056897081085884483958561365015034812` (Xi Jinping out in 2025, YES side)
+4. **tickSize** 和 **negRisk**: 根据市场调整这些参数，从 get-markets API 获取
+
+## 运行测试脚本
+
+```bash
+npm run test
+```
+
+或者直接使用 ts-node:
+
+```bash
+npx ts-node src/createOrder.ts
+```
+
+## 编译
+
+```bash
+npm run build
+```
+
+编译后的文件将输出到 `dist` 目录。
+
+## 运行编译后的文件
+
+```bash
+npm start
+```
+
+## 注意事项
+
+- **不要创建新的 API key**，始终使用 `createOrDerive` 方法
+- **signatureType** 说明：
+  - `1`: Magic/Email 登录
+  - `2`: 浏览器钱包 (Metamask, Coinbase Wallet 等)
+  - `0`: EOA (如果你不知道这是什么，说明你不在使用它)
+- 确保你的账户有足够的 USDC 余额
+- 在生产环境中使用前，请确保妥善保管私钥
+

polymarket-demo/package.json

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+{
+  "name": "polymarket-demo",
+  "version": "1.0.0",
+  "description": "Polymarket JS SDK 测试脚本",
+  "main": "index.js",
+  "scripts": {
+    "test": "ts-node src/createOrder.ts",
+    "build": "tsc",
+    "start": "node dist/createOrder.js"
+  },
+  "keywords": [
+    "polymarket",
+    "demo",
+    "test"
+  ],
+  "author": "",
+  "license": "MIT",
+  "dependencies": {
+    "@polymarket/clob-client": "^4.22.8",
+    "ethers": "^5.7.1"
+  },
+  "devDependencies": {
+    "@types/node": "^18.7.18",
+    "ts-node": "^10.9.1",
+    "typescript": "^4.8.3"
+  }
+}
+

polymarket-demo/src/createOrder.ts

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+//npm install @polymarket/clob-client
+//npm install ethers
+//Client initialization example and dumping API Keys
+
+import { ApiKeyCreds, ClobClient, OrderType, Side, } from "@polymarket/clob-client";
+import { Wallet } from "@ethersproject/wallet";
+
+const host = 'https://clob.polymarket.com';
+const funder = ''; //This is the address listed below your profile picture when using the Polymarket site.
+const signer = new Wallet("[PRIVATE_KEY_REMOVED]"); //This is your Private Key. If using email login export from https://reveal.magic.link/polymarket otherwise export from your Web3 Application
+
+
+//In general don't create a new API key, always derive or createOrDerive
+const creds = new ClobClient(host, 137, signer).createOrDeriveApiKey();
+
+//1: Magic/Email Login
+//2: Browser Wallet(Metamask, Coinbase Wallet, etc)
+//0: EOA (If you don't know what this is you're not using it)
+
+const signatureType = 1; 
+  (async () => {
+    const clobClient = new ClobClient(host, 137, signer, await creds, signatureType, funder);
+    const resp2 = await clobClient.createAndPostOrder(
+        {
+            tokenID: "114304586861386186441621124384163963092522056897081085884483958561365015034812", //Use https://docs.polymarket.com/developers/gamma-markets-api/get-markets to grab a sample token
+            price: 0.01,
+            side: Side.BUY,
+            size: 5,
+            feeRateBps: 0,
+        },
+        { tickSize: "0.01",negRisk: false }, //You'll need to adjust these based on the market. Get the tickSize and negRisk T/F from the get-markets above
+        //Refer to the API documentation to locate a tokenID: https://docs.polymarket.com/developers/gamma-markets-api/fetch-markets-guide
+        //Example token: 114304586861386186441621124384163963092522056897081085884483958561365015034812 ( Xi Jinping out in 2025, YES side )
+        //{ tickSize: "0.001",negRisk: true },
+
+        OrderType.GTC, 
+    );
+    console.log(resp2)
+  })();
+

polymarket-demo/tsconfig.json

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+{
+  "compilerOptions": {
+    "target": "ES2020",
+    "module": "commonjs",
+    "lib": ["ES2020"],
+    "outDir": "./dist",
+    "rootDir": "./src",
+    "strict": true,
+    "esModuleInterop": true,
+    "skipLibCheck": true,
+    "forceConsistentCasingInFileNames": true,
+    "resolveJsonModule": true,
+    "moduleResolution": "node",
+    "declaration": true,
+    "declarationMap": true,
+    "sourceMap": true
+  },
+  "include": ["src/**/*"],
+  "exclude": ["node_modules", "dist"]
+}
+