feat(trader): add Indodax exchange integration (#1400)

* feat(trader): add Indodax exchange integration

- Add IndodaxTrader implementing types.Trader interface for spot trading
- Support HMAC-SHA512 authentication with Key/Sign headers
- Map spot buy/sell to OpenLong/CloseLong, stub futures-only methods
- Wire up auto_trader.go, trader_manager.go, store/exchange.go
- Add Indodax to frontend ExchangeConfigModal and ExchangeIcons
- Add integration tests with env-var based credentials
- Add Indodax logo assets (PNG + SVG)

* fix: type validation at server.go for indodax exchange

trader/auto_trader.go

@@ -16,6 +16,7 @@ import (
 	"nofx/trader/bybit"
 	"nofx/trader/gate"
 	"nofx/trader/hyperliquid"
+	"nofx/trader/indodax"
 	"nofx/trader/kucoin"
 	"nofx/trader/lighter"
 	"nofx/trader/okx"
@@ -44,13 +45,13 @@ type AutoTraderConfig struct {
 	BybitSecretKey string
 
 	// OKX API configuration
-	OKXAPIKey    string
-	OKXSecretKey string
+	OKXAPIKey     string
+	OKXSecretKey  string
 	OKXPassphrase string
 
 	// Bitget API configuration
-	BitgetAPIKey    string
-	BitgetSecretKey string
+	BitgetAPIKey     string
+	BitgetSecretKey  string
 	BitgetPassphrase string
 
 	// Gate API configuration
@@ -58,10 +59,14 @@ type AutoTraderConfig struct {
 	GateSecretKey string
 
 	// KuCoin API configuration
-	KuCoinAPIKey    string
-	KuCoinSecretKey string
+	KuCoinAPIKey     string
+	KuCoinSecretKey  string
 	KuCoinPassphrase string
 
+	// Indodax API configuration
+	IndodaxAPIKey    string
+	IndodaxSecretKey string
+
 	// Hyperliquid configuration
 	HyperliquidPrivateKey  string
 	HyperliquidWalletAddr  string
@@ -122,9 +127,9 @@ type AutoTrader struct {
 	config                AutoTraderConfig
 	trader                Trader // Use Trader interface (supports multiple platforms)
 	mcpClient             mcp.AIClient
-	store                 *store.Store             // Data storage (decision records, etc.)
+	store                 *store.Store           // Data storage (decision records, etc.)
 	strategyEngine        *kernel.StrategyEngine // Strategy engine (uses strategy configuration)
-	cycleNumber           int                      // Current cycle number
+	cycleNumber           int                    // Current cycle number
 	initialBalance        float64
 	dailyPnL              float64
 	customPrompt          string // Custom trading strategy prompt
@@ -289,6 +294,9 @@ func NewAutoTrader(config AutoTraderConfig, st *store.Store, userID string) (*Au
 			return nil, fmt.Errorf("failed to initialize LIGHTER trader: %w", err)
 		}
 		logger.Infof("✓ LIGHTER trader initialized successfully")
+	case "indodax":
+		logger.Infof("🏦 [%s] Using Indodax Spot trading", config.Name)
+		trader = indodax.NewIndodaxTrader(config.IndodaxAPIKey, config.IndodaxSecretKey)
 	default:
 		return nil, fmt.Errorf("unsupported trading platform: %s", config.Exchange)
 	}
@@ -2181,22 +2189,22 @@ func (at *AutoTrader) recordOrderFill(orderRecordID int64, exchangeOrderID, symb
 	normalizedSymbol := market.Normalize(symbol)
 
 	fill := &store.TraderFill{
-		TraderID:         at.id,
-		ExchangeID:       at.exchangeID,
-		ExchangeType:     at.exchange,
-		OrderID:          orderRecordID,
-		ExchangeOrderID:  exchangeOrderID,
-		ExchangeTradeID:  tradeID,
-		Symbol:           normalizedSymbol,
-		Side:             side,
-		Price:            price,
-		Quantity:         quantity,
-		QuoteQuantity:    price * quantity,
-		Commission:       fee,
-		CommissionAsset:  "USDT",
-		RealizedPnL:      0, // Will be calculated for close orders
-		IsMaker:          false, // Market orders are usually taker
-		CreatedAt:        time.Now().UTC().UnixMilli(),
+		TraderID:        at.id,
+		ExchangeID:      at.exchangeID,
+		ExchangeType:    at.exchange,
+		OrderID:         orderRecordID,
+		ExchangeOrderID: exchangeOrderID,
+		ExchangeTradeID: tradeID,
+		Symbol:          normalizedSymbol,
+		Side:            side,
+		Price:           price,
+		Quantity:        quantity,
+		QuoteQuantity:   price * quantity,
+		Commission:      fee,
+		CommissionAsset: "USDT",
+		RealizedPnL:     0,     // Will be calculated for close orders
+		IsMaker:         false, // Market orders are usually taker
+		CreatedAt:       time.Now().UTC().UnixMilli(),
 	}
 
 	// Calculate realized PnL for close orders
@@ -2324,4 +2332,3 @@ func getSideFromAction(action string) string {
 func (at *AutoTrader) GetOpenOrders(symbol string) ([]OpenOrder, error) {
 	return at.trader.GetOpenOrders(symbol)
 }
-