feat(i18n): add 42 translation keys for TraderConfigModal (#1374)

- Add new translation keys for all hardcoded Chinese strings
- Replace hardcoded UI text with t('key', language) calls
- Support both English and Chinese languages

Modified files:
- web/src/i18n/translations.ts: +88 lines (42 new keys)
- web/src/components/TraderConfigModal.tsx: replaced 48 hardcoded strings

web/src/i18n/translations.ts

@@ -319,6 +319,50 @@ export const translations = {
     enabled: 'Enabled',
     save: 'Save',
 
+    // TraderConfigModal - New keys for hardcoded Chinese strings
+    fetchBalanceEditModeOnly: 'Only can fetch current balance in edit mode',
+    balanceFetched: 'Current balance fetched',
+    balanceFetchFailed: 'Failed to fetch balance',
+    balanceFetchNetworkError: 'Failed to fetch balance, please check network connection',
+    saving: 'Saving...',
+    saveSuccess: 'Saved successfully',
+    saveFailed: 'Save failed',
+    editTraderConfig: 'Edit Trader Configuration',
+    selectStrategyAndConfigParams: 'Select Strategy and Configure Basic Parameters',
+    basicConfig: 'Basic Configuration',
+    traderNameRequired: 'Trader Name *',
+    enterTraderNamePlaceholder: 'Enter trader name',
+    aiModelRequired: 'AI Model *',
+    exchangeRequired: 'Exchange *',
+    noExchangeAccount: "Don't have an exchange account? Click to register",
+    discount: 'Discount',
+    selectTradingStrategy: 'Select Trading Strategy',
+    useStrategy: 'Use Strategy',
+    noStrategyManual: '-- No Strategy (Manual Configuration) --',
+    active: ' (Active)',
+    default: ' [Default]',
+    noStrategyHint: 'No strategies yet, please create in Strategy Studio first',
+    strategyDetails: 'Strategy Details',
+    activating: 'Activating',
+    coinSource: 'Coin Source',
+    marginLimit: 'Margin Limit',
+    tradingParams: 'Trading Parameters',
+    marginMode: 'Margin Mode',
+    crossMargin: 'Cross Margin',
+    isolatedMargin: 'Isolated Margin',
+    competitionDisplay: 'Show in Competition',
+    show: 'Show',
+    hide: 'Hide',
+    hiddenInCompetition: 'This trader will not be shown in the competition page when hidden',
+    initialBalanceLabel: 'Initial Balance ($)',
+    fetching: 'Fetching...',
+    fetchCurrentBalance: 'Fetch Current Balance',
+    balanceUpdateHint: 'Used to manually update the initial balance baseline (e.g., after deposit/withdrawal)',
+    autoFetchBalanceInfo: 'The system will automatically fetch your account equity as the initial balance',
+    fetchingBalance: 'Fetching balance...',
+    editTrader: 'Save Changes',
+    createTraderButton: 'Create Trader',
+
     // AI Model Configuration
     officialAPI: 'Official API',
     customAPI: 'Custom API',
@@ -1523,6 +1567,50 @@ export const translations = {
     enabled: '启用',
     save: '保存',
 
+    // TraderConfigModal - New keys for hardcoded Chinese strings
+    fetchBalanceEditModeOnly: '只有在编辑模式下才能获取当前余额',
+    balanceFetched: '已获取当前余额',
+    balanceFetchFailed: '获取余额失败',
+    balanceFetchNetworkError: '获取余额失败，请检查网络连接',
+    saving: '正在保存…',
+    saveSuccess: '保存成功',
+    saveFailed: '保存失败',
+    editTraderConfig: '修改交易员配置',
+    selectStrategyAndConfigParams: '选择策略并配置基础参数',
+    basicConfig: '基础配置',
+    traderNameRequired: '交易员名称 *',
+    enterTraderNamePlaceholder: '请输入交易员名称',
+    aiModelRequired: 'AI模型 *',
+    exchangeRequired: '交易所 *',
+    noExchangeAccount: '还没有交易所账号？点击注册',
+    discount: '折扣优惠',
+    selectTradingStrategy: '选择交易策略',
+    useStrategy: '使用策略',
+    noStrategyManual: '-- 不使用策略（手动配置） --',
+    active: ' (当前激活)',
+    default: ' [默认]',
+    noStrategyHint: '暂无策略，请先在策略工作室创建策略',
+    strategyDetails: '策略详情',
+    activating: '激活中',
+    coinSource: '币种来源',
+    marginLimit: '保证金上限',
+    tradingParams: '交易参数',
+    marginMode: '保证金模式',
+    crossMargin: '全仓',
+    isolatedMargin: '逐仓',
+    competitionDisplay: '竞技场显示',
+    show: '显示',
+    hide: '隐藏',
+    hiddenInCompetition: '隐藏后将不在竞技场页面显示此交易员',
+    initialBalanceLabel: '初始余额 ($)',
+    fetching: '获取中...',
+    fetchCurrentBalance: '获取当前余额',
+    balanceUpdateHint: '用于手动更新初始余额基准（例如充值/提现后）',
+    autoFetchBalanceInfo: '系统将自动获取您的账户净值作为初始余额',
+    fetchingBalance: '正在获取余额…',
+    editTrader: '保存修改',
+    createTraderButton: '创建交易员',
+
     // AI Model Configuration
     officialAPI: '官方API',
     customAPI: '自定义API',