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

web/src/components/ExchangeIcons.tsx

@@ -17,6 +17,7 @@ const ICON_PATHS: Record<string, string> = {
   hyperliquid: '/exchange-icons/hyperliquid.png',
   aster: '/exchange-icons/aster.svg',
   lighter: '/exchange-icons/lighter.png',
+  indodax: '/exchange-icons/indodax.png',
 }
 
 // 通用图标组件
@@ -101,7 +102,9 @@ export const getExchangeIcon = (
                   ? 'aster'
                   : lowerType.includes('lighter')
                     ? 'lighter'
-                    : lowerType
+                    : lowerType.includes('indodax')
+                      ? 'indodax'
+                      : lowerType
 
   const iconProps = {
     width: props.width || 24,

web/src/components/traders/ExchangeConfigModal.tsx

@@ -30,6 +30,7 @@ const SUPPORTED_EXCHANGE_TEMPLATES = [
   { exchange_type: 'hyperliquid', name: 'Hyperliquid', type: 'dex' as const },
   { exchange_type: 'aster', name: 'Aster DEX', type: 'dex' as const },
   { exchange_type: 'lighter', name: 'Lighter', type: 'dex' as const },
+  { exchange_type: 'indodax', name: 'Indodax', type: 'cex' as const },
 ]
 
 interface ExchangeConfigModalProps {
@@ -204,6 +205,7 @@ export function ExchangeConfigModal({
     hyperliquid: { url: 'https://app.hyperliquid.xyz/join/AITRADING', hasReferral: true },
     aster: { url: 'https://www.asterdex.com/en/referral/fdfc0e', hasReferral: true },
     lighter: { url: 'https://app.lighter.xyz/?referral=68151432', hasReferral: true },
+    indodax: { url: 'https://indodax.com/ref/Saep23/1', hasReferral: true },
   }
 
   // Initialize form when editing
@@ -312,7 +314,7 @@ export function ExchangeConfigModal({
 
     setIsSaving(true)
     try {
-      if (currentExchangeType === 'binance' || currentExchangeType === 'bybit') {
+      if (currentExchangeType === 'binance' || currentExchangeType === 'bybit' || currentExchangeType === 'indodax') {
         if (!apiKey.trim() || !secretKey.trim()) return
         await onSave(exchangeId, exchangeType, trimmedAccountName, apiKey.trim(), secretKey.trim(), '', testnet)
       } else if (currentExchangeType === 'okx' || currentExchangeType === 'bitget' || currentExchangeType === 'kucoin') {
@@ -503,7 +505,7 @@ export function ExchangeConfigModal({
               </div>
 
               {/* CEX Fields */}
-              {(currentExchangeType === 'binance' || currentExchangeType === 'bybit' || currentExchangeType === 'okx' || currentExchangeType === 'bitget' || currentExchangeType === 'gate' || currentExchangeType === 'kucoin') && (
+              {(currentExchangeType === 'binance' || currentExchangeType === 'bybit' || currentExchangeType === 'okx' || currentExchangeType === 'bitget' || currentExchangeType === 'gate' || currentExchangeType === 'kucoin' || currentExchangeType === 'indodax') && (
                 <>
                   {currentExchangeType === 'binance' && (
                     <div