diff --git a/frontend/src/components/AccountSelector.jsx b/frontend/src/components/AccountSelector.jsx
index aa4e5e9..500ec5d 100644
--- a/frontend/src/components/AccountSelector.jsx
+++ b/frontend/src/components/AccountSelector.jsx
@@ -27,12 +27,20 @@ const AccountSelector = ({ onChanged, currentUser, viewingUserId: propViewingUse
               user_id: item.user_id
             }))
             setAccounts(accountsList)
-            // 自动选择第一个active账号
+            // 自动选择第一个active账号，并立即同步到localStorage和触发事件
             const firstActive = accountsList.find((a) => String(a?.status || 'active') === 'active') || accountsList[0]
             if (firstActive) {
               const nextAccountId = parseInt(String(firstActive.id || ''), 10)
               if (Number.isFinite(nextAccountId) && nextAccountId > 0) {
+                // 立即更新localStorage和触发事件，确保其他页面能同步
+                setCurrentAccountId(nextAccountId)
                 setAccountId(nextAccountId)
+                // 立即触发事件，确保其他页面能立即响应
+                try {
+                  window.dispatchEvent(new CustomEvent('ats:account:changed', { detail: { accountId: nextAccountId } }))
+                } catch (e) {
+                  // ignore
+                }
               }
             }
           })
@@ -59,12 +67,20 @@ const AccountSelector = ({ onChanged, currentUser, viewingUserId: propViewingUse
               user_id: item.user_id
             }))
             setAccounts(accountsList)
-            // 自动选择第一个active账号
+            // 自动选择第一个active账号，并立即同步到localStorage和触发事件
             const firstActive = accountsList.find((a) => String(a?.status || 'active') === 'active') || accountsList[0]
             if (firstActive) {
               const nextAccountId = parseInt(String(firstActive.id || ''), 10)
               if (Number.isFinite(nextAccountId) && nextAccountId > 0) {
+                // 立即更新localStorage和触发事件，确保其他页面能同步
+                setCurrentAccountId(nextAccountId)
                 setAccountId(nextAccountId)
+                // 立即触发事件，确保其他页面能立即响应
+                try {
+                  window.dispatchEvent(new CustomEvent('ats:account:changed', { detail: { accountId: nextAccountId } }))
+                } catch (e) {
+                  // ignore
+                }
               }
             }
           })