Feature/okx trading (#1177)

* feat: add OKX exchange trading support
- Add OKX trader client with full trading API integration
- Support API Key, Secret Key, and Passphrase authentication
- Add OKX icon and frontend configuration modal
- Update exchange store and types for OKX fields
* fix: add passphrase column migration and fix exchange type mapping
* fix: show OKX input fields in exchange config modal
* fix: ensure all supported exchanges exist for user when listing
* fix: simplify exchange type check condition for OKX
* debug: add visible debug info for exchange id
* fix: remove debug info from exchange config modal
* fix: add OKX to exchange type condition in AITradersPage
* feat: complete OKX trading support and fix exchange config issues
- Add LIGHTER exchange UI support in AITradersPage
- Add passphrase field to UpdateExchangeConfigRequest type
- Fix OKX HTTP client to bypass proxy (disable system proxy)
- Auto-fetch initial balance from exchange when not set
- Support multiple balance field names for different exchanges
- Add detailed error messages when trader fails to load
- Add lighter_api_key_private_key field to exchange store

web/src/types.ts

@@ -114,6 +114,7 @@ export interface Exchange {
   enabled: boolean
   apiKey?: string
   secretKey?: string
+  passphrase?: string // OKX 特定字段
   testnet?: boolean
   // Hyperliquid 特定字段
   hyperliquidWalletAddr?: string
@@ -163,6 +164,7 @@ export interface UpdateExchangeConfigRequest {
       enabled: boolean
       api_key: string
       secret_key: string
+      passphrase?: string
       testnet?: boolean
       // Hyperliquid 特定字段
       hyperliquid_wallet_addr?: string