feat: add admin panel with multi-chain support and notification system

- Add full admin REST API: auth, API keys, chains, chain tokens, wallets,
  orders, RPC nodes, settings, dashboard stats, notifications
- Add JWT-based admin authentication and API key auth middleware
- Add multi-chain listeners: BSC, ETH, Polygon, Plasma, EVM WebSocket
- Add RPC node health check job with automatic failover
- Add Telegram notification channel for order events
- Add installer for first-run database initialization
- Add new DB models: admin_user, api_key, chain, chain_token,
  rpc_node, settings, notification_channel
- Add order statistics aggregation (daily/monthly/by-chain)
- Serve built admin SPA from embedded www/ assets
- Add comprehensive test coverage for all new features

src/model/response/pay_response.go

@@ -1,20 +1,21 @@
 package response
 
 type CheckoutCounterResponse struct {
-	TradeId        string  `json:"trade_id"`        //  epusdt订单号
-	Amount         float64 `json:"amount"`          //  订单金额，保留4位小数 法币金额
-	ActualAmount   float64 `json:"actual_amount"`   //  订单实际需要支付的金额，保留4位小数 加密货币金额
-	Token          string  `json:"token"`           //  所属币种 TRX USDT......
-	Currency       string  `json:"currency"`        //  法币币种 CNY USD ...
-	ReceiveAddress string  `json:"receive_address"` //  收款钱包地址
-	Network        string  `json:"network"`         //  网络 TRON ETH ...
-	ExpirationTime int64   `json:"expiration_time"` // 过期时间 时间戳
-	RedirectUrl    string  `json:"redirect_url"`
-	CreatedAt      int64   `json:"created_at"` // 订单创建时间 时间戳
-	IsSelected     bool    `json:"is_selected"`
+	TradeId        string  `json:"trade_id" example:"T2026041612345678"`        //  epusdt订单号
+	Amount         float64 `json:"amount" example:"100.0000"`                   //  订单金额，保留4位小数 法币金额
+	ActualAmount   float64 `json:"actual_amount" example:"14.2857"`             //  订单实际需要支付的金额，保留4位小数 加密货币金额
+	Token          string  `json:"token" example:"USDT"`                        //  所属币种 TRX USDT......
+	Currency       string  `json:"currency" example:"CNY"`                      //  法币币种 CNY USD ...
+	ReceiveAddress string  `json:"receive_address" example:"TTestTronAddress001"` //  收款钱包地址
+	Network        string  `json:"network" example:"tron"`                      //  网络 TRON ETH ...
+	ExpirationTime int64   `json:"expiration_time" example:"1713264600"`        // 过期时间 时间戳
+	RedirectUrl    string  `json:"redirect_url" example:"https://example.com/success"`
+	CreatedAt      int64   `json:"created_at" example:"1713264000"` // 订单创建时间 时间戳
+	IsSelected     bool    `json:"is_selected" example:"false"`
 }
 
 type CheckStatusResponse struct {
-	TradeId string `json:"trade_id"` //  epusdt订单号
-	Status  int    `json:"status"`
+	TradeId string `json:"trade_id" example:"T2026041612345678"` //  epusdt订单号
+	// 订单状态 1=等待支付 2=支付成功 3=已过期
+	Status int `json:"status" enums:"1,2,3" example:"1"`
 }