refactor: 尾盘策略统一更名为加密价差策略

- 前端：菜单父级「加密价差策略」，子项「策略配置」「实时监控」；i18n 与类型注释全部替换
- 后端：i18n、ErrorCode、DTO/实体/服务注释与日志「尾盘」→「加密价差策略」；TG 通知文案
- 文档：README、中英文用户指南、UI 规格、任务、流程、价差流程、市场数据、动态系数等全部更新
- 不修改 API 路径、路由、表名与类名，保持兼容

Co-authored-by: Cursor <cursoragent@cursor.com>

frontend/src/components/Layout.tsx

@@ -168,7 +168,7 @@ const Layout: React.FC<LayoutProps> = ({ children }) => {
     {
       key: '/crypto-tail-management',
       icon: <LineChartOutlined />,
-      label: t('menu.cryptoTail'),
+      label: t('menu.cryptoSpreadStrategy'),
       children: [
         {
           key: '/crypto-tail-strategy',

frontend/src/locales/en/common.json

@@ -312,9 +312,9 @@
     "leaders": "Leader Management",
     "templates": "Templates",
     "copyTradingConfig": "Copy Trading Config",
-    "cryptoTail": "Crypto Tail",
-    "cryptoTailStrategy": "Tail Strategy",
-    "cryptoTailMonitor": "Tail Monitor",
+    "cryptoSpreadStrategy": "Crypto Spread Strategy",
+    "cryptoTailStrategy": "Strategy Config",
+    "cryptoTailMonitor": "Real-time Monitor",
     "positions": "Position Management",
     "backtest": "Backtest",
     "statistics": "Statistics",
@@ -1486,12 +1486,12 @@
   "cryptoTailStrategy": {
     "binanceApiAlert": {
       "title": "Cannot connect to Binance API — strategy cannot run for now",
-      "description": "Tail strategy needs Binance market data to work. The connection failed; this may be a network issue or Binance outage. Try again later by clicking the button below.",
+      "description": "Crypto spread strategy needs Binance market data to work. The connection failed; this may be a network issue or Binance outage. Try again later by clicking the button below.",
       "recheck": "Re-check"
     },
     "list": {
-      "title": "Crypto Tail Strategy",
-      "walletTip": "Use a dedicated wallet for tail strategy. Do not use it for manual trading or copy trading to avoid balance/position issues.",
+      "title": "Crypto Spread Strategy",
+      "walletTip": "Use a dedicated wallet for crypto spread strategy. Do not use it for manual trading or copy trading to avoid balance/position issues.",
       "addStrategy": "Add Strategy",
       "strategyName": "Strategy Name",
       "account": "Account",
@@ -1548,7 +1548,7 @@
     },
     "redeemRequiredModal": {
       "title": "Configure Auto Redeem First",
-      "description": "Tail strategy requires auto redeem. Please configure Builder API Key and enable auto redeem in System Settings.",
+      "description": "Crypto spread strategy requires auto redeem. Please configure Builder API Key and enable auto redeem in System Settings.",
       "goToSettings": "Go to Settings",
       "cancel": "Cancel"
     },
@@ -1579,7 +1579,7 @@
     }
   },
   "cryptoTailMonitor": {
-    "title": "Tail Strategy Monitor",
+    "title": "Crypto Spread Strategy Monitor",
     "selectStrategy": "Strategy",
     "selectStrategyPlaceholder": "Select a strategy to monitor",
     "direction": "Direction",

frontend/src/locales/zh-CN/common.json

@@ -312,9 +312,9 @@
     "leaders": "Leader 管理",
     "templates": "跟单模板",
     "copyTradingConfig": "跟单配置",
-    "cryptoTail": "尾盘",
-    "cryptoTailStrategy": "尾盘策略",
-    "cryptoTailMonitor": "尾盘监控",
+    "cryptoSpreadStrategy": "加密价差策略",
+    "cryptoTailStrategy": "策略配置",
+    "cryptoTailMonitor": "实时监控",
     "positions": "仓位管理",
     "backtest": "回测",
     "statistics": "统计信息",
@@ -1486,12 +1486,12 @@
   "cryptoTailStrategy": {
     "binanceApiAlert": {
       "title": "无法连接币安 API，策略暂时不能运行",
-      "description": "尾盘策略需要从币安获取行情数据才能工作。当前连接失败，可能是网络问题或币安服务异常，请稍后点击下方按钮重新检测。",
+      "description": "加密价差策略需要从币安获取行情数据才能工作。当前连接失败，可能是网络问题或币安服务异常，请稍后点击下方按钮重新检测。",
       "recheck": "重新检测"
     },
     "list": {
-      "title": "加密尾盘策略",
-      "walletTip": "请使用单独的钱包运行尾盘策略，避免该钱包用于手动交易、跟单等其他操作，否则可能导致余额或仓位变化，造成策略执行异常。",
+      "title": "加密价差策略",
+      "walletTip": "请使用单独的钱包运行加密价差策略，避免该钱包用于手动交易、跟单等其他操作，否则可能导致余额或仓位变化，造成策略执行异常。",
       "addStrategy": "新增策略",
       "strategyName": "策略名称",
       "account": "账户",
@@ -1548,7 +1548,7 @@
     },
     "redeemRequiredModal": {
       "title": "请先配置自动赎回",
-      "description": "尾盘策略依赖自动赎回功能，请先在系统设置中配置 Builder API Key 并开启自动赎回。",
+      "description": "加密价差策略依赖自动赎回功能，请先在系统设置中配置 Builder API Key 并开启自动赎回。",
       "goToSettings": "去配置",
       "cancel": "取消"
     },
@@ -1579,7 +1579,7 @@
     }
   },
   "cryptoTailMonitor": {
-    "title": "尾盘策略监控",
+    "title": "加密价差策略监控",
     "selectStrategy": "选择策略",
     "selectStrategyPlaceholder": "请选择要监控的策略",
     "direction": "监控方向",

frontend/src/locales/zh-TW/common.json

@@ -312,9 +312,9 @@
     "leaders": "Leader 管理",
     "templates": "跟單模板",
     "copyTradingConfig": "跟單配置",
-    "cryptoTail": "尾盤",
-    "cryptoTailStrategy": "尾盤策略",
-    "cryptoTailMonitor": "尾盤監控",
+    "cryptoSpreadStrategy": "加密價差策略",
+    "cryptoTailStrategy": "策略配置",
+    "cryptoTailMonitor": "即時監控",
     "positions": "倉位管理",
     "backtest": "回測",
     "statistics": "統計信息",
@@ -1486,12 +1486,12 @@
   "cryptoTailStrategy": {
     "binanceApiAlert": {
       "title": "無法連接幣安 API，策略暫時不能運行",
-      "description": "尾盤策略需要從幣安取得行情資料才能運作。目前連線失敗，可能是網路問題或幣安服務異常，請稍後點擊下方按鈕重新檢測。",
+      "description": "加密價差策略需要從幣安取得行情資料才能運作。目前連線失敗，可能是網路問題或幣安服務異常，請稍後點擊下方按鈕重新檢測。",
       "recheck": "重新檢測"
     },
     "list": {
-      "title": "加密尾盤策略",
-      "walletTip": "請使用單獨的錢包運行尾盤策略，避免該錢包用於手動交易、跟單等其他操作，否則可能導致餘額或倉位變化，造成策略執行異常。",
+      "title": "加密價差策略",
+      "walletTip": "請使用單獨的錢包運行加密價差策略，避免該錢包用於手動交易、跟單等其他操作，否則可能導致餘額或倉位變化，造成策略執行異常。",
       "addStrategy": "新增策略",
       "strategyName": "策略名稱",
       "account": "賬戶",
@@ -1548,7 +1548,7 @@
     },
     "redeemRequiredModal": {
       "title": "請先配置自動贖回",
-      "description": "尾盤策略依賴自動贖回功能，請先在系統設置中配置 Builder API Key 並開啟自動贖回。",
+      "description": "加密價差策略依賴自動贖回功能，請先在系統設置中配置 Builder API Key 並開啟自動贖回。",
       "goToSettings": "去配置",
       "cancel": "取消"
     },
@@ -1579,7 +1579,7 @@
     }
   },
   "cryptoTailMonitor": {
-    "title": "尾盤策略監控",
+    "title": "加密價差策略監控",
     "selectStrategy": "選擇策略",
     "selectStrategyPlaceholder": "請選擇要監控的策略",
     "direction": "監控方向",

frontend/src/services/api.ts

@@ -446,7 +446,7 @@ export const apiService = {
   },
 
   /**
-   * 尾盘策略 API
+   * 加密价差策略 API
    */
   cryptoTailStrategy: {
     list: (data: { accountId?: number; enabled?: boolean } = {}) =>

frontend/src/types/index.ts

@@ -1036,7 +1036,7 @@ export interface BacktestTaskDto {
 }
 
 /**
- * 尾盘策略
+ * 加密价差策略
  */
 export interface CryptoTailStrategyDto {
   id: number
@@ -1076,7 +1076,7 @@ export interface CryptoTailAutoMinSpreadResponse {
 }
 
 /**
- * 尾盘策略触发记录
+ * 加密价差策略触发记录
  */
 export interface CryptoTailStrategyTriggerDto {
   id: number
@@ -1098,7 +1098,7 @@ export interface CryptoTailStrategyTriggerDto {
 }
 
 /**
- * 尾盘策略市场选项
+ * 加密价差策略市场选项
  */
 export interface CryptoTailMarketOptionDto {
   slug: string
@@ -1109,7 +1109,7 @@ export interface CryptoTailMarketOptionDto {
 }
 
 /**
- * 尾盘策略监控初始化响应
+ * 加密价差策略监控初始化响应
  */
 export interface CryptoTailMonitorInitResponse {
   /** 策略ID */
@@ -1159,7 +1159,7 @@ export interface CryptoTailMonitorInitResponse {
 }
 
 /**
- * 尾盘策略监控实时推送数据
+ * 加密价差策略监控实时推送数据
  */
 export interface CryptoTailMonitorPushData {
   /** 策略ID */