fix: 修改批量删除会话方式

- 从逐条单个删除改为官方的批量删除接口
- 单个删除函数保留备用

webui/src/features/account/useAccountActions.js

@@ -196,7 +196,7 @@ export function useAccountActions({ apiFetch, t, onMessage, onRefresh, config, f
             const data = await res.json()
             
             if (data.success) {
-                onMessage('success', t('accountManager.deleteAllSessionsSuccess', { count: data.deleted }))
+                onMessage('success', t('accountManager.deleteAllSessionsSuccess'))
                 // 清除会话数显示
                 setSessionCounts(prev => {
                     const newCounts = { ...prev }

webui/src/locales/en.json

@@ -135,7 +135,7 @@
         "sessionCount": "Sessions: {count}",
         "deleteAllSessions": "Delete all sessions",
         "deleteAllSessionsConfirm": "Are you sure you want to delete all sessions for this account? This action cannot be undone.",
-        "deleteAllSessionsSuccess": "Successfully deleted {count} sessions"
+        "deleteAllSessionsSuccess": "Successfully deleted all sessions"
     },
     "apiTester": {
         "defaultMessage": "Hello, please introduce yourself in one sentence.",

webui/src/locales/zh.json

@@ -135,7 +135,7 @@
         "sessionCount": "会话: {count}",
         "deleteAllSessions": "删除所有会话",
         "deleteAllSessionsConfirm": "确定要删除该账号的所有会话吗？此操作不可恢复。",
-        "deleteAllSessionsSuccess": "成功删除 {count} 个会话"
+        "deleteAllSessionsSuccess": "删除成功"
     },
     "apiTester": {
         "defaultMessage": "你好，请用一句话介绍你自己。",