feat: 添加关键字过滤功能并优化市场 slug 处理

主要变更：
1. 关键字过滤功能
   - 添加关键字过滤模式（白名单/黑名单/禁用）
   - 支持关键字列表配置（JSON 存储）
   - 实现关键字匹配逻辑（不区分大小写）
   - 数据库迁移：V20__add_keyword_filter.sql

2. 市场 slug 优化
   - 区分显示用 slug 和跳转用 eventSlug
   - 添加 event_slug 字段到 markets 表（V21__add_event_slug_to_markets.sql）
   - 从 events[0].slug 获取跳转用的 slug 并存入数据库
   - 减少 API 请求，提高性能

3. UI 优化
   - 将创建/编辑跟单配置改为 Modal 方式
   - 删除独立的 CopyTradingAdd 和 CopyTradingEdit 页面
   - 更新前端跳转逻辑，优先使用 eventSlug

4. API 响应优化
   - 更新 MarketResponse 添加 events 字段
   - 统一从 events[0].slug 获取跳转用的 slug
   - 更新所有相关服务使用新的 slug 获取逻辑

frontend/src/pages/CopyTradingList.tsx

@@ -1,5 +1,4 @@
 import { useEffect, useState } from 'react'
-import { useNavigate } from 'react-router-dom'
 import { Card, Table, Button, Space, Tag, Popconfirm, Switch, message, Select, Dropdown, Divider, Spin } from 'antd'
 import { PlusOutlined, DeleteOutlined, BarChartOutlined, UnorderedListOutlined, ArrowUpOutlined, ArrowDownOutlined, EditOutlined } from '@ant-design/icons'
 import { useTranslation } from 'react-i18next'
@@ -13,12 +12,12 @@ import CopyTradingOrdersModal from './CopyTradingOrders/index'
 import StatisticsModal from './CopyTradingOrders/StatisticsModal'
 import FilteredOrdersModal from './CopyTradingOrders/FilteredOrdersModal'
 import EditModal from './CopyTradingOrders/EditModal'
+import AddModal from './CopyTradingOrders/AddModal'
 
 const { Option } = Select
 
 const CopyTradingList: React.FC = () => {
   const { t } = useTranslation()
-  const navigate = useNavigate()
   const isMobile = useMediaQuery({ maxWidth: 768 })
   const { accounts, fetchAccounts } = useAccountStore()
   const [copyTradings, setCopyTradings] = useState<CopyTrading[]>([])
@@ -42,6 +41,7 @@ const CopyTradingList: React.FC = () => {
   const [filteredOrdersModalCopyTradingId, setFilteredOrdersModalCopyTradingId] = useState<string>('')
   const [editModalOpen, setEditModalOpen] = useState(false)
   const [editModalCopyTradingId, setEditModalCopyTradingId] = useState<string>('')
+  const [addModalOpen, setAddModalOpen] = useState(false)
   
   useEffect(() => {
     fetchAccounts()
@@ -369,7 +369,7 @@ const CopyTradingList: React.FC = () => {
           <Button
             type="primary"
             icon={<PlusOutlined />}
-            onClick={() => navigate('/copy-trading/add')}
+            onClick={() => setAddModalOpen(true)}
           >
             {t('copyTradingList.addCopyTrading') || '新增跟单'}
           </Button>
@@ -668,6 +668,13 @@ const CopyTradingList: React.FC = () => {
           fetchCopyTradings()
         }}
       />
+      <AddModal
+        open={addModalOpen}
+        onClose={() => setAddModalOpen(false)}
+        onSuccess={() => {
+          fetchCopyTradings()
+        }}
+      />
     </div>
   )
 }