feat: 添加市场大单监听策略（Whale Monitor Strategy）

支持按市场分类/体育联赛筛选并选择市场，实时监听 Activity WebSocket 交易流，
在滑动窗口内聚合 BUY 成交额，达到阈值后自动下 FAK 单。

后端：策略 CRUD、WS 监听、滑动窗口聚合、订单执行、触发记录
前端：策略列表/创建/编辑、市场搜索选择（分类+联赛）、触发记录查看

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

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

@@ -317,6 +317,8 @@
     "cryptoSpreadStrategy": "加密價差策略",
     "cryptoTailStrategy": "策略配置",
     "cryptoTailMonitor": "即時監控",
+    "whaleMonitorStrategy": "大單監聽",
+    "whaleMonitorStrategyConfig": "策略配置",
     "positions": "倉位管理",
     "backtest": "回測",
     "statistics": "統計信息",
@@ -1846,6 +1848,113 @@
       "periodChanged": "週期已切換，彈窗已關閉"
     }
   },
+  "whaleMonitorStrategy": {
+    "list": {
+      "title": "大單監聽策略",
+      "addStrategy": "新建策略",
+      "strategyName": "策略名稱",
+      "account": "綁定賬戶",
+      "markets": "監聽市場",
+      "marketCount": "市場數",
+      "window": "聚合窗口",
+      "threshold": "觸發閾值",
+      "orderAmount": "下單金額",
+      "priceRange": "價格區間",
+      "cooldown": "冷卻時間",
+      "enabled": "啟用",
+      "lastTrigger": "最近觸發",
+      "triggerCount": "觸發次數",
+      "actions": "操作",
+      "edit": "編輯",
+      "enable": "啟用",
+      "disable": "停用",
+      "delete": "刪除",
+      "viewTriggers": "觸發記錄",
+      "deleteConfirm": "確定要刪除該策略嗎？",
+      "fetchFailed": "獲取策略列表失敗",
+      "seconds": "秒",
+      "conditionId": "ConditionId"
+    },
+    "form": {
+      "strategyName": "策略名稱",
+      "strategyNamePlaceholder": "可選，留空自動生成",
+      "selectAccount": "選擇賬戶",
+      "conditionIds": "監聯市場",
+      "conditionIdsPlaceholder": "搜索市場名稱或輸入 conditionId",
+      "selectMarket": "請選擇市場",
+      "sportLeague": "選擇聯賽",
+      "selectSportFirst": "請先選擇聯賽",
+      "tagFilter": "市場分類",
+      "tagSports": "體育",
+      "tagCrypto": "加密貨幣",
+      "tagPolitics": "政治",
+      "tagPopCulture": "流行文化",
+      "windowSeconds": "聚合窗口（秒）",
+      "thresholdAmount": "觸發閾值金額",
+      "orderAmount": "固定下單金額",
+      "minPrice": "最低價格",
+      "maxPrice": "最高價格",
+      "priceTip": "範圍 0~1，最多兩位小數",
+      "cooldownSeconds": "冷卻時間（秒）",
+      "enabled": "啟用策略",
+      "create": "創建",
+      "update": "更新",
+      "selectMarkets": "選擇監聽市場",
+      "marketsSelected": "已選 {{count}} 個市場"
+    },
+    "marketSelect": {
+      "title": "選擇市場",
+      "subtitle": "按分類篩選或搜索市場名稱，可多選",
+      "back": "返回",
+      "searchPlaceholder": "搜索市場名稱（至少 2 個字符）",
+      "searchHint": "請輸入關鍵詞搜索，或選擇上方分類篩選",
+      "sportsGamesHint": "體育聯賽將展示單場比賽盤口；也可輸入隊名搜索",
+      "sportsGamesEmpty": "該聯賽當前暫無進行中的單場比賽盤口，可嘗試搜索隊名或稍後再試",
+      "empty": "未找到匹配的市場",
+      "selectedTitle": "已選市場（{{count}}）",
+      "selectedCount": "已選 {{count}} 個",
+      "confirm": "確認選擇",
+      "confirmWithCount": "確認（{{count}}）",
+      "volume": "成交量",
+      "viewMarket": "查看市場",
+      "sectionGame": "單場比賽",
+      "sectionSeason": "長期市場",
+      "ungrouped": "其他市場",
+      "selectGroup": "全選",
+      "marketsInGroup": "{{count}} 個盤口",
+      "tag": {
+        "all": "全部",
+        "sports": "體育",
+        "politics": "政治",
+        "crypto": "加密貨幣",
+        "popCulture": "流行文化"
+      }
+    },
+    "triggerRecords": {
+      "title": "觸發記錄",
+      "timeRange": "時間範圍",
+      "startDate": "開始日期",
+      "endDate": "結束日期",
+      "successTab": "成功",
+      "failTab": "失敗",
+      "triggerTime": "觸發時間",
+      "conditionId": "市場",
+      "tokenId": "Token ID",
+      "side": "方向",
+      "triggerVolume": "觸發金額",
+      "orderPrice": "下單價格",
+      "orderSize": "下單數量",
+      "orderAmount": "下單金額",
+      "orderId": "訂單ID",
+      "status": "狀態",
+      "success": "成功",
+      "fail": "失敗",
+      "failReason": "失敗原因",
+      "emptySuccess": "暫無成功記錄",
+      "emptyFail": "暫無失敗記錄",
+      "totalCount": "共 {{count}} 條記錄"
+    }
+  },
   "clobMigration": {
     "title": "CLOB 2.0 遷移提醒",
     "description": "Polymarket CLOB 已升級至 V2 版本，您需要前往帳戶頁完成 USDC 遷移操作，以確保交易功能正常使用。",