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web/static/i18n/en-US.json

@@ -1656,6 +1656,7 @@
     "rateWarning": "Some failures detected",
     "rateCritical": "High failure rate",
     "statsSubtitle": "Refreshed {{time}} · {{count}} tools",
+    "retentionHint": "Execution records are kept for {{days}} days, then purged automatically.",
     "timelineTitle": "Call trend",
     "timelineHint": "All tools combined (not split by tool)",
     "timelineRange24h": "24h",

web/static/i18n/zh-CN.json

@@ -1644,6 +1644,7 @@
     "rateWarning": "存在失败调用",
     "rateCritical": "失败率偏高",
     "statsSubtitle": "最后刷新 {{time}} · 共 {{count}} 个工具",
+    "retentionHint": "执行记录保留 {{days}} 天，超期自动清理",
     "timelineTitle": "调用趋势",
     "timelineHint": "全部工具合计，不按工具拆分",
     "timelineRange24h": "24 小时",

web/static/js/monitor.js

@@ -3532,6 +3532,7 @@ const monitorState = {
     timelineRange: null,
     timelineError: null,
     lastFetchedAt: null,
+    retentionDays: 0,
     pagination: {
         page: 1,
         pageSize: (() => {
@@ -3627,6 +3628,7 @@ async function refreshMonitorPanel(page = null) {
         monitorState.timeline = timeline;
         monitorState.timelineError = timelineError;
         monitorState.lastFetchedAt = new Date();
+        monitorState.retentionDays = typeof result.retention_days === 'number' ? result.retention_days : 0;
         
         // 更新分页信息
         if (result.total !== undefined) {
@@ -3710,6 +3712,7 @@ async function refreshMonitorPanelWithFilter(statusFilter = 'all', toolFilter =
         monitorState.timeline = timeline;
         monitorState.timelineError = timelineError;
         monitorState.lastFetchedAt = new Date();
+        monitorState.retentionDays = typeof result.retention_days === 'number' ? result.retention_days : 0;
         
         // 更新分页信息
         if (result.total !== undefined) {
@@ -4527,15 +4530,20 @@ function renderMcpStatsStackedBar(success, failed) {
     </div>`;
 }
 
-function updateMonitorStatsSubtitle(lastFetchedAt, toolCount) {
+function updateMonitorStatsSubtitle(lastFetchedAt, toolCount, retentionDays) {
     const subtitle = document.getElementById('monitor-stats-subtitle');
     if (!subtitle) return;
     const locale = (typeof window.__locale === 'string' && window.__locale.startsWith('zh')) ? 'zh-CN' : 'en-US';
     const timeText = lastFetchedAt
         ? (lastFetchedAt.toLocaleString ? lastFetchedAt.toLocaleString(locale) : String(lastFetchedAt))
         : '—';
-    const text = mcpMonitorT('statsSubtitle', { time: timeText, count: toolCount })
+    let text = mcpMonitorT('statsSubtitle', { time: timeText, count: toolCount })
         || monitorFallback(`最后刷新 ${timeText} · 共 ${toolCount} 个工具`, `Refreshed ${timeText} · ${toolCount} tools`);
+    if (typeof retentionDays === 'number' && retentionDays > 0) {
+        const hint = mcpMonitorT('retentionHint', { days: retentionDays })
+            || monitorFallback(`执行记录保留 ${retentionDays} 天，超期自动清理`, `Execution records are kept for ${retentionDays} days, then purged automatically.`);
+        text += ' · ' + hint;
+    }
     subtitle.textContent = text;
     subtitle.hidden = false;
 }
@@ -4960,7 +4968,7 @@ function renderMonitorStats(statsMap = {}, lastFetchedAt = null) {
     } else if (toolFilterEl) {
         toolFilterEl.classList.remove('is-filter-active');
     }
-    updateMonitorStatsSubtitle(lastFetchedAt, entries.length);
+    updateMonitorStatsSubtitle(lastFetchedAt, entries.length, monitorState.retentionDays);
 }
 
 function renderMonitorExecutions(executions = [], statusFilter = 'all') {