add chache for last known good in sqlite..

src/fgai/dashboard.py

@@ -233,6 +233,7 @@ async function refresh() {
   const threat = (data.capabilities || {}).threat_intel || {};
   const mcp = (data.capabilities || {}).graylog_mcp || {};
   const configuration = data.configuration || {};
+  const cache = data.status_cache || {};
   const streamCoverage = data.stream_coverage || [];
   const enabledStreams = streamCoverage.filter(item => item.enabled);
   const streamsMissingProfile = enabledStreams.filter(item => !item.profile_ready).length;
@@ -258,6 +259,8 @@ async function refresh() {
     capability('Graylog MCP', mcp.status === 'connected' ? 'on' : 'warn', configuration.log_source === 'graylog_mcp' ? (mcp.status || 'checking') : 'not selected')
   ].join('');
   document.getElementById('liveStatus').innerHTML = [
+    data.stale ? `<span class="sev-high">Showing cached dashboard data because live MCP fetch failed.</span>` : '',
+    cache.stored_at ? `Cached snapshot: ${esc(new Date(cache.stored_at * 1000).toLocaleString())}` : '',
     `Log file: <code>${esc(data.log_path || '')}</code>`,
     `Policy file: <code>${esc(data.policy_path || 'none')}</code>`,
     `Critical anomalies: ${esc((a.critical || 0))}`,