Initial commit: Polymarket copy trading bot

- Backend: Spring Boot + Kotlin implementation
  - Account management with private key import
  - Leader management
  - Copy trading configuration
  - Order synchronization
  - Balance and position queries via Polymarket API
  - Ethereum RPC integration for USDC balance
  - Proxy address calculation

- Frontend: React + TypeScript
  - Account management UI
  - Mobile responsive design
  - Account import with private key/mnemonic support
  - Balance display and account details modal

- Database: MySQL with Flyway migrations
- API Integration: Polymarket CLOB API, Data API, Ethereum RPC

backend/src/main/resources/db/migration/V1__create_copy_trading_accounts_table.sql

@@ -0,0 +1,14 @@
+-- 创建账户表
+CREATE TABLE IF NOT EXISTS copy_trading_accounts (
+    id BIGINT AUTO_INCREMENT PRIMARY KEY,
+    private_key VARCHAR(500) NOT NULL COMMENT '私钥（加密存储）',
+    wallet_address VARCHAR(42) NOT NULL UNIQUE COMMENT '钱包地址（从私钥推导）',
+    api_key VARCHAR(500) NULL COMMENT 'Polymarket API Key（可选，加密存储）',
+    account_name VARCHAR(100) NULL COMMENT '账户名称',
+    is_default BOOLEAN NOT NULL DEFAULT FALSE COMMENT '是否默认账户',
+    created_at BIGINT NOT NULL COMMENT '创建时间（毫秒时间戳）',
+    updated_at BIGINT NOT NULL COMMENT '更新时间（毫秒时间戳）',
+    INDEX idx_wallet_address (wallet_address),
+    INDEX idx_is_default (is_default)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='跟单系统账户表';
+

backend/src/main/resources/db/migration/V2__add_api_secret_and_passphrase_to_accounts.sql

@@ -0,0 +1,5 @@
+-- 添加 API Secret 和 Passphrase 字段
+ALTER TABLE copy_trading_accounts 
+ADD COLUMN api_secret VARCHAR(500) NULL COMMENT 'Polymarket API Secret（可选，加密存储）' AFTER api_key,
+ADD COLUMN api_passphrase VARCHAR(500) NULL COMMENT 'Polymarket API Passphrase（可选，加密存储）' AFTER api_secret;
+

backend/src/main/resources/db/migration/V3__add_proxy_address_to_accounts.sql

@@ -0,0 +1,4 @@
+-- 添加代理地址字段到账户表
+ALTER TABLE copy_trading_accounts 
+ADD COLUMN proxy_address VARCHAR(42) NOT NULL COMMENT 'Polymarket 代理钱包地址（从合约获取，必须）' AFTER wallet_address;
+