feat: add one-click close position for all exchanges

- Add handleClosePosition API endpoint in server.go
- Add closePosition API function in frontend
- Add close position button to positions table in App.tsx and TraderDashboard.tsx
- Fix GetFullConfig to include passphrase field for OKX
- Fix OKX CloseLong/CloseShort to use position quantity directly (already in contracts)

api/server.go

@@ -135,6 +135,7 @@ func (s *Server) setupRoutes() {
 			protected.POST("/traders/:id/stop", s.handleStopTrader)
 			protected.PUT("/traders/:id/prompt", s.handleUpdateTraderPrompt)
 			protected.POST("/traders/:id/sync-balance", s.handleSyncBalance)
+			protected.POST("/traders/:id/close-position", s.handleClosePosition)
 
 			// AI模型配置
 			protected.GET("/models", s.handleGetModelConfigs)
@@ -1098,6 +1099,122 @@ func (s *Server) handleSyncBalance(c *gin.Context) {
 	})
 }
 
+// handleClosePosition 一键平仓
+func (s *Server) handleClosePosition(c *gin.Context) {
+	userID := c.GetString("user_id")
+	traderID := c.Param("id")
+
+	var req struct {
+		Symbol string `json:"symbol" binding:"required"`
+		Side   string `json:"side" binding:"required"` // "LONG" or "SHORT"
+	}
+
+	if err := c.ShouldBindJSON(&req); err != nil {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "参数错误: symbol和side必填"})
+		return
+	}
+
+	logger.Infof("🔻 用户 %s 请求平仓: trader=%s, symbol=%s, side=%s", userID, traderID, req.Symbol, req.Side)
+
+	// 从数据库获取交易员配置（包含交易所信息）
+	fullConfig, err := s.store.Trader().GetFullConfig(userID, traderID)
+	if err != nil {
+		c.JSON(http.StatusNotFound, gin.H{"error": "交易员不存在"})
+		return
+	}
+
+	traderConfig := fullConfig.Trader
+	exchangeCfg := fullConfig.Exchange
+
+	if exchangeCfg == nil || !exchangeCfg.Enabled {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "交易所未配置或未启用"})
+		return
+	}
+
+	// 创建临时 trader 执行平仓
+	var tempTrader trader.Trader
+	var createErr error
+
+	switch traderConfig.ExchangeID {
+	case "binance":
+		tempTrader = trader.NewFuturesTrader(exchangeCfg.APIKey, exchangeCfg.SecretKey, userID)
+	case "hyperliquid":
+		tempTrader, createErr = trader.NewHyperliquidTrader(
+			exchangeCfg.APIKey,
+			exchangeCfg.HyperliquidWalletAddr,
+			exchangeCfg.Testnet,
+		)
+	case "aster":
+		tempTrader, createErr = trader.NewAsterTrader(
+			exchangeCfg.AsterUser,
+			exchangeCfg.AsterSigner,
+			exchangeCfg.AsterPrivateKey,
+		)
+	case "bybit":
+		tempTrader = trader.NewBybitTrader(
+			exchangeCfg.APIKey,
+			exchangeCfg.SecretKey,
+		)
+	case "okx":
+		tempTrader = trader.NewOKXTrader(
+			exchangeCfg.APIKey,
+			exchangeCfg.SecretKey,
+			exchangeCfg.Passphrase,
+		)
+	case "lighter":
+		if exchangeCfg.LighterAPIKeyPrivateKey != "" {
+			tempTrader, createErr = trader.NewLighterTraderV2(
+				exchangeCfg.LighterPrivateKey,
+				exchangeCfg.LighterWalletAddr,
+				exchangeCfg.LighterAPIKeyPrivateKey,
+				exchangeCfg.Testnet,
+			)
+		} else {
+			tempTrader, createErr = trader.NewLighterTrader(
+				exchangeCfg.LighterPrivateKey,
+				exchangeCfg.LighterWalletAddr,
+				exchangeCfg.Testnet,
+			)
+		}
+	default:
+		c.JSON(http.StatusBadRequest, gin.H{"error": "不支持的交易所类型"})
+		return
+	}
+
+	if createErr != nil {
+		logger.Infof("⚠️ 创建临时 trader 失败: %v", createErr)
+		c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("连接交易所失败: %v", createErr)})
+		return
+	}
+
+	// 执行平仓操作
+	var result map[string]interface{}
+	var closeErr error
+
+	if req.Side == "LONG" {
+		result, closeErr = tempTrader.CloseLong(req.Symbol, 0) // 0 表示全部平仓
+	} else if req.Side == "SHORT" {
+		result, closeErr = tempTrader.CloseShort(req.Symbol, 0) // 0 表示全部平仓
+	} else {
+		c.JSON(http.StatusBadRequest, gin.H{"error": "side必须是LONG或SHORT"})
+		return
+	}
+
+	if closeErr != nil {
+		logger.Infof("❌ 平仓失败: symbol=%s, side=%s, error=%v", req.Symbol, req.Side, closeErr)
+		c.JSON(http.StatusInternalServerError, gin.H{"error": fmt.Sprintf("平仓失败: %v", closeErr)})
+		return
+	}
+
+	logger.Infof("✅ 平仓成功: symbol=%s, side=%s, result=%v", req.Symbol, req.Side, result)
+	c.JSON(http.StatusOK, gin.H{
+		"message": "平仓成功",
+		"symbol":  req.Symbol,
+		"side":    req.Side,
+		"result":  result,
+	})
+}
+
 // handleGetModelConfigs 获取AI模型配置
 func (s *Server) handleGetModelConfigs(c *gin.Context) {
 	userID := c.GetString("user_id")

store/trader.go

@@ -227,7 +227,7 @@ func (s *TraderStore) GetFullConfig(userID, traderID string) (*TraderFullConfig,
 			t.created_at, t.updated_at,
 			a.id, a.user_id, a.name, a.provider, a.enabled, a.api_key,
 			COALESCE(a.custom_api_url, ''), COALESCE(a.custom_model_name, ''), a.created_at, a.updated_at,
-			e.id, e.user_id, e.name, e.type, e.enabled, e.api_key, e.secret_key, e.testnet,
+			e.id, e.user_id, e.name, e.type, e.enabled, e.api_key, e.secret_key, COALESCE(e.passphrase, ''), e.testnet,
 			COALESCE(e.hyperliquid_wallet_addr, ''), COALESCE(e.aster_user, ''), COALESCE(e.aster_signer, ''),
 			COALESCE(e.aster_private_key, ''), COALESCE(e.lighter_wallet_addr, ''), COALESCE(e.lighter_private_key, ''),
 			COALESCE(e.lighter_api_key_private_key, ''), e.created_at, e.updated_at
@@ -244,7 +244,7 @@ func (s *TraderStore) GetFullConfig(userID, traderID string) (*TraderFullConfig,
 		&aiModel.ID, &aiModel.UserID, &aiModel.Name, &aiModel.Provider, &aiModel.Enabled, &aiModel.APIKey,
 		&aiModel.CustomAPIURL, &aiModel.CustomModelName, &aiModelCreatedAt, &aiModelUpdatedAt,
 		&exchange.ID, &exchange.UserID, &exchange.Name, &exchange.Type, &exchange.Enabled,
-		&exchange.APIKey, &exchange.SecretKey, &exchange.Testnet, &exchange.HyperliquidWalletAddr,
+		&exchange.APIKey, &exchange.SecretKey, &exchange.Passphrase, &exchange.Testnet, &exchange.HyperliquidWalletAddr,
 		&exchange.AsterUser, &exchange.AsterSigner, &exchange.AsterPrivateKey,
 		&exchange.LighterWalletAddr, &exchange.LighterPrivateKey, &exchange.LighterAPIKeyPrivateKey,
 		&exchangeCreatedAt, &exchangeUpdatedAt,
@@ -264,6 +264,7 @@ func (s *TraderStore) GetFullConfig(userID, traderID string) (*TraderFullConfig,
 	aiModel.APIKey = s.decrypt(aiModel.APIKey)
 	exchange.APIKey = s.decrypt(exchange.APIKey)
 	exchange.SecretKey = s.decrypt(exchange.SecretKey)
+	exchange.Passphrase = s.decrypt(exchange.Passphrase)
 	exchange.AsterPrivateKey = s.decrypt(exchange.AsterPrivateKey)
 	exchange.LighterPrivateKey = s.decrypt(exchange.LighterPrivateKey)
 	exchange.LighterAPIKeyPrivateKey = s.decrypt(exchange.LighterAPIKeyPrivateKey)

trader/okx_trader.go

@@ -195,7 +195,9 @@ func (t *OKXTrader) doRequest(method, path string, body interface{}) ([]byte, er
 		return nil, fmt.Errorf("解析响应失败: %w", err)
 	}
 
-	if okxResp.Code != "0" {
+	// code=1 表示部分成功，需要检查 data 里的具体结果
+	// code=2 表示全部失败
+	if okxResp.Code != "0" && okxResp.Code != "1" {
 		return nil, fmt.Errorf("OKX API错误: code=%s, msg=%s", okxResp.Code, okxResp.Msg)
 	}
 
@@ -639,7 +641,7 @@ func (t *OKXTrader) OpenShort(symbol string, quantity float64, leverage int) (ma
 func (t *OKXTrader) CloseLong(symbol string, quantity float64) (map[string]interface{}, error) {
 	instId := t.convertSymbol(symbol)
 
-	// 如果数量为0，获取当前持仓
+	// 如果数量为0，获取当前持仓（positionAmt 就是张数）
 	if quantity == 0 {
 		positions, err := t.GetPositions()
 		if err != nil {
@@ -647,7 +649,7 @@ func (t *OKXTrader) CloseLong(symbol string, quantity float64) (map[string]inter
 		}
 		for _, pos := range positions {
 			if pos["symbol"] == symbol && pos["side"] == "long" {
-				quantity = pos["positionAmt"].(float64)
+				quantity = pos["positionAmt"].(float64) // 这已经是张数
 				break
 			}
 		}
@@ -656,19 +658,17 @@ func (t *OKXTrader) CloseLong(symbol string, quantity float64) (map[string]inter
 		}
 	}
 
-	// 获取合约信息
+	// 获取合约信息用于格式化张数
 	inst, err := t.getInstrument(symbol)
 	if err != nil {
 		return nil, fmt.Errorf("获取合约信息失败: %w", err)
 	}
 
-	price, err := t.GetMarketPrice(symbol)
+	// quantity 已经是张数，直接格式化
-	if err != nil {
+	szStr := t.formatSize(quantity, inst)
-		return nil, fmt.Errorf("获取市价失败: %w", err)
-	}
 
-	sz := quantity * price / inst.CtVal
+	logger.Infof("🔻 OKX平多仓参数: symbol=%s, instId=%s, quantity(张数)=%f, szStr=%s",
-	szStr := t.formatSize(sz, inst)
+		symbol, instId, quantity, szStr)
 
 	body := map[string]interface{}{
 		"instId":  instId,
@@ -720,7 +720,7 @@ func (t *OKXTrader) CloseLong(symbol string, quantity float64) (map[string]inter
 func (t *OKXTrader) CloseShort(symbol string, quantity float64) (map[string]interface{}, error) {
 	instId := t.convertSymbol(symbol)
 
-	// 如果数量为0，获取当前持仓
+	// 如果数量为0，获取当前持仓（positionAmt 就是张数）
 	if quantity == 0 {
 		positions, err := t.GetPositions()
 		if err != nil {
@@ -728,7 +728,7 @@ func (t *OKXTrader) CloseShort(symbol string, quantity float64) (map[string]inte
 		}
 		for _, pos := range positions {
 			if pos["symbol"] == symbol && pos["side"] == "short" {
-				quantity = pos["positionAmt"].(float64)
+				quantity = pos["positionAmt"].(float64) // 这已经是张数
 				break
 			}
 		}
@@ -737,19 +737,17 @@ func (t *OKXTrader) CloseShort(symbol string, quantity float64) (map[string]inte
 		}
 	}
 
-	// 获取合约信息
+	// 获取合约信息用于格式化张数
 	inst, err := t.getInstrument(symbol)
 	if err != nil {
 		return nil, fmt.Errorf("获取合约信息失败: %w", err)
 	}
 
-	price, err := t.GetMarketPrice(symbol)
+	// quantity 已经是张数，直接格式化
-	if err != nil {
+	szStr := t.formatSize(quantity, inst)
-		return nil, fmt.Errorf("获取市价失败: %w", err)
-	}
 
-	sz := quantity * price / inst.CtVal
+	logger.Infof("🔻 OKX平空仓参数: symbol=%s, instId=%s, quantity(张数)=%f, szStr=%s",
-	szStr := t.formatSize(sz, inst)
+		symbol, instId, quantity, szStr)
 
 	body := map[string]interface{}{
 		"instId":  instId,
@@ -762,6 +760,8 @@ func (t *OKXTrader) CloseShort(symbol string, quantity float64) (map[string]inte
 		"tag":     okxTag,
 	}
 
+	logger.Infof("🔻 OKX平空仓请求体: %+v", body)
+
 	data, err := t.doRequest("POST", okxOrderPath, body)
 	if err != nil {
 		return nil, fmt.Errorf("平空仓失败: %w", err)
@@ -780,12 +780,13 @@ func (t *OKXTrader) CloseShort(symbol string, quantity float64) (map[string]inte
 	if len(orders) == 0 || orders[0].SCode != "0" {
 		msg := "未知错误"
 		if len(orders) > 0 {
-			msg = orders[0].SMsg
+			msg = fmt.Sprintf("sCode=%s, sMsg=%s", orders[0].SCode, orders[0].SMsg)
 		}
+		logger.Infof("❌ OKX平空仓失败: %s, 响应: %s", msg, string(data))
 		return nil, fmt.Errorf("平空仓失败: %s", msg)
 	}
 
-	logger.Infof("✓ OKX平空仓成功: %s", symbol)
+	logger.Infof("✓ OKX平空仓成功: %s, ordId=%s", symbol, orders[0].OrdId)
 
 	// 平仓后取消挂单
 	t.CancelAllOrders(symbol)

web/src/App.tsx

@@ -18,6 +18,7 @@ import { t, type Language } from './i18n/translations'
 import { useSystemConfig } from './hooks/useSystemConfig'
 import { DecisionCard } from './components/DecisionCard'
 import { BacktestPage } from './components/BacktestPage'
+import { LogOut, Loader2 } from 'lucide-react'
 import type {
   SystemStatus,
   AccountInfo,
@@ -524,6 +525,31 @@ function TraderDetailsPage({
   lastUpdate: string
   language: Language
 }) {
+  const [closingPosition, setClosingPosition] = useState<string | null>(null)
+
+  // 平仓操作
+  const handleClosePosition = async (symbol: string, side: string) => {
+    if (!selectedTraderId) return
+
+    const confirmMsg = language === 'zh'
+      ? `确定要平仓 ${symbol} ${side === 'LONG' ? '多仓' : '空仓'} 吗？`
+      : `Are you sure you want to close ${symbol} ${side === 'LONG' ? 'LONG' : 'SHORT'} position?`
+
+    if (!confirm(confirmMsg)) return
+
+    setClosingPosition(symbol)
+    try {
+      await api.closePosition(selectedTraderId, symbol, side)
+      const successMsg = language === 'zh' ? '平仓成功' : 'Position closed successfully'
+      alert(successMsg)
+      window.location.reload()
+    } catch (err: unknown) {
+      const errorMsg = err instanceof Error ? err.message : (language === 'zh' ? '平仓失败' : 'Failed to close position')
+      alert(errorMsg)
+    } finally {
+      setClosingPosition(null)
+    }
+  }
   // If API failed with error, show empty state (likely backend not running)
   if (tradersError) {
     return (
@@ -836,6 +862,9 @@ function TraderDetailsPage({
                       <th className="pb-3 font-semibold text-gray-400">
                         {t('side', language)}
                       </th>
+                      <th className="pb-3 font-semibold text-gray-400">
+                        {language === 'zh' ? '操作' : 'Action'}
+                      </th>
                       <th className="pb-3 font-semibold text-gray-400">
                         {t('entryPrice', language)}
                       </th>
@@ -889,6 +918,27 @@ function TraderDetailsPage({
                             )}
                           </span>
                         </td>
+                        <td className="py-3">
+                          <button
+                            type="button"
+                            onClick={() => handleClosePosition(pos.symbol, pos.side.toUpperCase())}
+                            disabled={closingPosition === pos.symbol}
+                            className="flex items-center gap-1 px-2 py-1 rounded text-xs font-semibold transition-all hover:scale-105 disabled:opacity-50 disabled:cursor-not-allowed"
+                            style={{
+                              background: 'rgba(246, 70, 93, 0.1)',
+                              color: '#F6465D',
+                              border: '1px solid rgba(246, 70, 93, 0.3)',
+                            }}
+                            title={language === 'zh' ? '平仓' : 'Close Position'}
+                          >
+                            {closingPosition === pos.symbol ? (
+                              <Loader2 className="w-3 h-3 animate-spin" />
+                            ) : (
+                              <LogOut className="w-3 h-3" />
+                            )}
+                            {language === 'zh' ? '平仓' : 'Close'}
+                          </button>
+                        </td>
                         <td
                           className="py-3 font-mono"
                           style={{ color: '#EAECEF' }}

web/src/lib/api.ts

@@ -102,6 +102,15 @@ export const api = {
     if (!result.success) throw new Error('停止交易员失败')
   },
 
+  async closePosition(traderId: string, symbol: string, side: string): Promise<{ message: string }> {
+    const result = await httpClient.post<{ message: string }>(
+      `${API_BASE}/traders/${traderId}/close-position`,
+      { symbol, side }
+    )
+    if (!result.success) throw new Error('平仓失败')
+    return result.data!
+  },
+
   async updateTraderPrompt(
     traderId: string,
     customPrompt: string

web/src/pages/TraderDashboard.tsx

@@ -18,6 +18,8 @@ import {
   Check,
   X,
   XCircle,
+  LogOut,
+  Loader2,
 } from 'lucide-react'
 import { stripLeadingIcons } from '../lib/text'
 import type {
@@ -63,6 +65,9 @@ export default function TraderDashboard() {
   const [selectedChartSymbol, setSelectedChartSymbol] = useState<string | undefined>()
   const [chartUpdateKey, setChartUpdateKey] = useState(0)
 
+  // 平仓操作状态
+  const [closingPosition, setClosingPosition] = useState<string | null>(null) // symbol being closed
+
   // 点击持仓币种时调用
   const handlePositionSymbolClick = (symbol: string) => {
     setSelectedChartSymbol(symbol)
@@ -75,6 +80,31 @@ export default function TraderDashboard() {
     localStorage.setItem('decisionLimit', newLimit.toString())
   }
 
+  // 平仓操作
+  const handleClosePosition = async (symbol: string, side: string) => {
+    if (!selectedTraderId) return
+
+    const confirmMsg = language === 'zh'
+      ? `确定要平仓 ${symbol} ${side === 'LONG' ? '多仓' : '空仓'} 吗？`
+      : `Are you sure you want to close ${symbol} ${side === 'LONG' ? 'LONG' : 'SHORT'} position?`
+
+    if (!confirm(confirmMsg)) return
+
+    setClosingPosition(symbol)
+    try {
+      await api.closePosition(selectedTraderId, symbol, side)
+      const successMsg = language === 'zh' ? '平仓成功' : 'Position closed successfully'
+      alert(successMsg)
+      // 刷新持仓数据
+      window.location.reload()
+    } catch (err: unknown) {
+      const errorMsg = err instanceof Error ? err.message : (language === 'zh' ? '平仓失败' : 'Failed to close position')
+      alert(errorMsg)
+    } finally {
+      setClosingPosition(null)
+    }
+  }
+
   // 获取trader列表（仅在用户登录时）
   const { data: traders, error: tradersError } = useSWR<TraderInfo[]>(
     user && token ? 'traders' : null,
@@ -474,6 +504,9 @@ export default function TraderDashboard() {
                       <th className="pb-3 font-semibold text-gray-400">
                         {t('side', language)}
                       </th>
+                      <th className="pb-3 font-semibold text-gray-400">
+                        {language === 'zh' ? '操作' : 'Action'}
+                      </th>
                       <th className="pb-3 font-semibold text-gray-400">
                         {t('entryPrice', language)}
                       </th>
@@ -544,6 +577,27 @@ export default function TraderDashboard() {
                             )}
                           </span>
                         </td>
+                        <td className="py-3">
+                          <button
+                            type="button"
+                            onClick={() => handleClosePosition(pos.symbol, pos.side.toUpperCase())}
+                            disabled={closingPosition === pos.symbol}
+                            className="flex items-center gap-1 px-2 py-1 rounded text-xs font-semibold transition-all hover:scale-105 disabled:opacity-50 disabled:cursor-not-allowed"
+                            style={{
+                              background: 'rgba(246, 70, 93, 0.1)',
+                              color: '#F6465D',
+                              border: '1px solid rgba(246, 70, 93, 0.3)',
+                            }}
+                            title={language === 'zh' ? '平仓' : 'Close Position'}
+                          >
+                            {closingPosition === pos.symbol ? (
+                              <Loader2 className="w-3 h-3 animate-spin" />
+                            ) : (
+                              <LogOut className="w-3 h-3" />
+                            )}
+                            {language === 'zh' ? '平仓' : 'Close'}
+                          </button>
+                        </td>
                         <td
                           className="py-3 font-mono"
                           style={{ color: '#EAECEF' }}