diff --git a/web/src/App.tsx b/web/src/App.tsx
index b53bcc0c..c547726d 100644
--- a/web/src/App.tsx
+++ b/web/src/App.tsx
@@ -170,9 +170,7 @@ function App() {
       ) {
         setCurrentPage('trader')
         // 如果 URL 中有 trader 参数（slug 格式），更新选中的 trader
-        if (traderParam) {
-          setSelectedTraderSlug(traderParam)
-        }
+        setSelectedTraderSlug(traderParam || undefined)
       } else if (
         path === '/competition' ||
         hash === 'competition' ||
@@ -200,7 +198,7 @@ function App() {
   // 获取trader列表（仅在用户登录时）
   const { data: traders, error: tradersError } = useSWR<TraderInfo[]>(
     user && token ? 'traders' : null,
-    api.getTraders,
+    () => api.getTraders(currentPage === 'trader'),
     {
       refreshInterval: 10000,
       shouldRetryOnError: false, // 避免在后端未运行时无限重试
@@ -219,19 +217,22 @@ function App() {
 
   // 当获取到traders后，根据 URL 中的 trader slug 设置选中的 trader，或默认选中第一个
   useEffect(() => {
-    if (traders && traders.length > 0 && !selectedTraderId) {
-      if (selectedTraderSlug) {
-        // 通过 slug 找到对应的 trader
-        const trader = findTraderBySlug(selectedTraderSlug, traders)
-        if (trader) {
-          setSelectedTraderId(trader.trader_id)
-        } else {
-          // 如果找不到，选中第一个
-          setSelectedTraderId(traders[0].trader_id)
-        }
-      } else {
-        setSelectedTraderId(traders[0].trader_id)
+    if (!traders || traders.length === 0) {
+      return
+    }
+
+    if (selectedTraderSlug) {
+      // 通过 slug 找到对应的 trader
+      const trader = findTraderBySlug(selectedTraderSlug, traders)
+      const nextTraderId = trader?.trader_id || traders[0].trader_id
+      if (nextTraderId !== selectedTraderId) {
+        setSelectedTraderId(nextTraderId)
       }
+      return
+    }
+
+    if (!selectedTraderId) {
+      setSelectedTraderId(traders[0].trader_id)
     }
   }, [traders, selectedTraderId, selectedTraderSlug])
 
@@ -240,7 +241,7 @@ function App() {
     currentPage === 'trader' && selectedTraderId
       ? `status-${selectedTraderId}`
       : null,
-    () => api.getStatus(selectedTraderId),
+    () => api.getStatus(selectedTraderId, true),
     {
       refreshInterval: 15000, // 15秒刷新（配合后端15秒缓存）
       revalidateOnFocus: false, // 禁用聚焦时重新验证，减少请求
@@ -303,7 +304,7 @@ function App() {
     currentPage === 'trader' && selectedTraderId
       ? `statistics-${selectedTraderId}`
       : null,
-    () => api.getStatistics(selectedTraderId),
+    () => api.getStatistics(selectedTraderId, true),
     {
       refreshInterval: 30000, // 30秒刷新（统计数据更新频率较低）
       revalidateOnFocus: false,
@@ -520,7 +521,18 @@ function App() {
               <AITradersPage
                 onTraderSelect={(traderId) => {
                   setSelectedTraderId(traderId)
-                  window.history.pushState({}, '', '/dashboard')
+                  const trader = traders?.find((item) => item.trader_id === traderId)
+                  const url = new URL(window.location.href)
+                  url.pathname = '/dashboard'
+                  if (trader) {
+                    const slug = getTraderSlug(trader)
+                    url.searchParams.set('trader', slug)
+                    setSelectedTraderSlug(slug)
+                  } else {
+                    url.searchParams.delete('trader')
+                    setSelectedTraderSlug(undefined)
+                  }
+                  window.history.pushState({}, '', url.toString())
                   setRoute('/dashboard')
                   setCurrentPage('trader')
                 }}
@@ -550,8 +562,10 @@ function App() {
                   // 更新 URL 参数（使用 slug: name-id前4位）
                   const trader = traders?.find(t => t.trader_id === traderId)
                   if (trader) {
+                    const slug = getTraderSlug(trader)
+                    setSelectedTraderSlug(slug)
                     const url = new URL(window.location.href)
-                    url.searchParams.set('trader', getTraderSlug(trader))
+                    url.searchParams.set('trader', slug)
                     window.history.replaceState({}, '', url.toString())
                   }
                 }}
diff --git a/web/src/components/charts/AdvancedChart.tsx b/web/src/components/charts/AdvancedChart.tsx
index 1b2dc62a..42361708 100644
--- a/web/src/components/charts/AdvancedChart.tsx
+++ b/web/src/components/charts/AdvancedChart.tsx
@@ -153,7 +153,7 @@ export function AdvancedChart({
     try {
       const limit = 1500
       const klineUrl = `/api/klines?symbol=${symbol}&interval=${interval}&limit=${limit}&exchange=${exchange}`
-      const result = await httpClient.get(klineUrl)
+      const result = await httpClient.request(klineUrl, { silent: true })
 
       if (!result.success || !result.data) {
         throw new Error('Failed to fetch kline data')
@@ -243,7 +243,10 @@ export function AdvancedChart({
     try {
       console.log('[AdvancedChart] Fetching orders for trader:', traderID, 'symbol:', symbol)
       // Fetch filled orders, up to 200 for more history
-      const result = await httpClient.get(`/api/orders?trader_id=${traderID}&symbol=${symbol}&status=FILLED&limit=200`)
+      const result = await httpClient.request(
+        `/api/orders?trader_id=${traderID}&symbol=${symbol}&status=FILLED&limit=200`,
+        { silent: true }
+      )
 
       console.log('[AdvancedChart] Orders API response:', result)
 
@@ -326,7 +329,10 @@ export function AdvancedChart({
   const fetchOpenOrders = async (traderID: string, symbol: string): Promise<OpenOrder[]> => {
     try {
       console.log('[AdvancedChart] Fetching open orders for trader:', traderID, 'symbol:', symbol)
-      const result = await httpClient.get(`/api/open-orders?trader_id=${traderID}&symbol=${symbol}`)
+      const result = await httpClient.request(
+        `/api/open-orders?trader_id=${traderID}&symbol=${symbol}`,
+        { silent: true }
+      )
 
       console.log('[AdvancedChart] Open orders API response:', result)
 
diff --git a/web/src/components/charts/ChartWithOrders.tsx b/web/src/components/charts/ChartWithOrders.tsx
index 7c0f6195..421c41bc 100644
--- a/web/src/components/charts/ChartWithOrders.tsx
+++ b/web/src/components/charts/ChartWithOrders.tsx
@@ -114,7 +114,7 @@ export function ChartWithOrders({
       const limit = 2000 // Fetch recent 2000 candles (more historical data)
       const klineUrl = `/api/klines?symbol=${symbol}&interval=${interval}&limit=${limit}&exchange=${exchange}`
 
-      const result = await httpClient.get(klineUrl)
+      const result = await httpClient.request(klineUrl, { silent: true })
 
       if (!result.success || !result.data) {
         throw new Error('Failed to fetch kline data from our service')
@@ -142,7 +142,10 @@ export function ChartWithOrders({
   const fetchOrders = async (traderID: string, symbol: string): Promise<OrderMarker[]> => {
     try {
       // Fetch filled orders for this trader from backend API
-      const result = await httpClient.get(`/api/orders?trader_id=${traderID}&symbol=${symbol}&status=FILLED&limit=50`)
+      const result = await httpClient.request(
+        `/api/orders?trader_id=${traderID}&symbol=${symbol}&status=FILLED&limit=50`,
+        { silent: true }
+      )
 
       if (!result.success || !result.data) {
         console.warn('Failed to fetch orders:', result.message)
diff --git a/web/src/components/charts/ChartWithOrdersSimple.tsx b/web/src/components/charts/ChartWithOrdersSimple.tsx
index 529c95b8..81fd9af9 100644
--- a/web/src/components/charts/ChartWithOrdersSimple.tsx
+++ b/web/src/components/charts/ChartWithOrdersSimple.tsx
@@ -31,7 +31,7 @@ export function ChartWithOrdersSimple({
         const klineUrl = `/api/klines?symbol=${symbol}&interval=${interval}&limit=${limit}`
 
         console.log('[ChartSimple] Fetching klines from our service:', klineUrl)
-        const klineResult = await httpClient.get(klineUrl)
+        const klineResult = await httpClient.request(klineUrl, { silent: true })
 
         if (!klineResult.success || !klineResult.data) {
           throw new Error('Failed to fetch klines from our service')
@@ -44,7 +44,7 @@ export function ChartWithOrdersSimple({
         if (traderID) {
           const tradesUrl = `/api/trades?trader_id=${traderID}&symbol=${symbol}&limit=100`
           console.log('[ChartSimple] Fetching trades from:', tradesUrl)
-          const tradesResult = await httpClient.get(tradesUrl)
+          const tradesResult = await httpClient.request(tradesUrl, { silent: true })
 
           if (tradesResult.success && tradesResult.data) {
             console.log('[ChartSimple] Received trades:', tradesResult.data.length)
diff --git a/web/src/components/charts/EquityChart.tsx b/web/src/components/charts/EquityChart.tsx
index 407baeda..76bbeb2f 100644
--- a/web/src/components/charts/EquityChart.tsx
+++ b/web/src/components/charts/EquityChart.tsx
@@ -43,7 +43,7 @@ export function EquityChart({ traderId, embedded = false }: EquityChartProps) {
 
   const { data: history, error, isLoading } = useSWR<EquityPoint[]>(
     user && token && traderId ? `equity-history-${traderId}` : null,
-    () => api.getEquityHistory(traderId),
+    () => api.getEquityHistory(traderId, true),
     {
       refreshInterval: 30000, // 30秒刷新（历史数据更新频率较低）
       revalidateOnFocus: false,
@@ -53,7 +53,7 @@ export function EquityChart({ traderId, embedded = false }: EquityChartProps) {
 
   const { data: account } = useSWR(
     user && token && traderId ? `account-${traderId}` : null,
-    () => api.getAccount(traderId),
+    () => api.getAccount(traderId, true),
     {
       refreshInterval: 15000, // 15秒刷新（配合后端缓存）
       revalidateOnFocus: false,
diff --git a/web/src/components/trader/PositionHistory.tsx b/web/src/components/trader/PositionHistory.tsx
index 42303527..f501dd6c 100644
--- a/web/src/components/trader/PositionHistory.tsx
+++ b/web/src/components/trader/PositionHistory.tsx
@@ -359,7 +359,11 @@ export function PositionHistory({ traderId }: PositionHistoryProps) {
         setLoading(true)
         setError(null)
         // Fetch more data than needed to support filtering, but respect pageSize for initial load
-        const data = await api.getPositionHistory(traderId, Math.max(200, pageSize * 5))
+        const data = await api.getPositionHistory(
+          traderId,
+          Math.max(200, pageSize * 5),
+          true
+        )
         setPositions(data.positions || [])
         setStats(data.stats)
         setSymbolStats(data.symbol_stats || [])
diff --git a/web/src/lib/api/data.ts b/web/src/lib/api/data.ts
index 58345370..9ec9cf7d 100644
--- a/web/src/lib/api/data.ts
+++ b/web/src/lib/api/data.ts
@@ -10,11 +10,11 @@ import type {
 import { API_BASE, httpClient } from './helpers'
 
 export const dataApi = {
-  async getStatus(traderId?: string): Promise<SystemStatus> {
+  async getStatus(traderId?: string, silent?: boolean): Promise<SystemStatus> {
     const url = traderId
       ? `${API_BASE}/status?trader_id=${traderId}`
       : `${API_BASE}/status`
-    const result = await httpClient.get<SystemStatus>(url)
+    const result = await httpClient.request<SystemStatus>(url, { silent })
     if (!result.success) throw new Error('Failed to fetch system status')
     return result.data!
   },
@@ -65,20 +65,20 @@ export const dataApi = {
     return result.data!
   },
 
-  async getStatistics(traderId?: string): Promise<Statistics> {
+  async getStatistics(traderId?: string, silent?: boolean): Promise<Statistics> {
     const url = traderId
       ? `${API_BASE}/statistics?trader_id=${traderId}`
       : `${API_BASE}/statistics`
-    const result = await httpClient.get<Statistics>(url)
+    const result = await httpClient.request<Statistics>(url, { silent })
     if (!result.success) throw new Error('Failed to fetch statistics')
     return result.data!
   },
 
-  async getEquityHistory(traderId?: string): Promise<any[]> {
+  async getEquityHistory(traderId?: string, silent?: boolean): Promise<any[]> {
     const url = traderId
       ? `${API_BASE}/equity-history?trader_id=${traderId}`
       : `${API_BASE}/equity-history`
-    const result = await httpClient.get<any[]>(url)
+    const result = await httpClient.request<any[]>(url, { silent })
     if (!result.success) throw new Error('Failed to fetch equity history')
     return result.data!
   },
@@ -114,9 +114,14 @@ export const dataApi = {
     return result.data!
   },
 
-  async getPositionHistory(traderId: string, limit: number = 100): Promise<PositionHistoryResponse> {
-    const result = await httpClient.get<PositionHistoryResponse>(
-      `${API_BASE}/positions/history?trader_id=${traderId}&limit=${limit}`
+  async getPositionHistory(
+    traderId: string,
+    limit: number = 100,
+    silent?: boolean
+  ): Promise<PositionHistoryResponse> {
+    const result = await httpClient.request<PositionHistoryResponse>(
+      `${API_BASE}/positions/history?trader_id=${traderId}&limit=${limit}`,
+      { silent }
     )
     if (!result.success) throw new Error('Failed to fetch position history')
     return result.data!
diff --git a/web/src/lib/api/traders.ts b/web/src/lib/api/traders.ts
index fecdb5ca..8971894c 100644
--- a/web/src/lib/api/traders.ts
+++ b/web/src/lib/api/traders.ts
@@ -16,8 +16,11 @@ function throwApiError(
 }
 
 export const traderApi = {
-  async getTraders(): Promise<TraderInfo[]> {
-    const result = await httpClient.get<TraderInfo[]>(`${API_BASE}/my-traders`)
+  async getTraders(silent?: boolean): Promise<TraderInfo[]> {
+    const result = await httpClient.request<TraderInfo[]>(
+      `${API_BASE}/my-traders`,
+      { silent }
+    )
     if (!result.success) throw new Error('Failed to fetch trader list')
     return Array.isArray(result.data) ? result.data : []
   },