Fix: Combro resolved remaining bugs in summary.js and agents.js where site_uuid all was mishandled causing empty overview dashboards

backend/routes/dashboard/summary.js

@@ -40,9 +40,11 @@ router.get('/summary', async (req, res) => {
     } else {
       // ── Site-Level Summary (default) ─────────────────────────────────────────
       const agentQuery = {
-        site_uuid: baseWithoutTime.site_uuid || { $in: await Summary.distinct('site_uuid') },
         agent_uuid: { $ne: null }
       };
+      if (baseWithoutTime.site_uuid) {
+        agentQuery.site_uuid = baseWithoutTime.site_uuid;
+      }
       if (timeFilter) agentQuery.timestamp = timeFilter;
 
       const allAgentSummaries = await Summary.find(agentQuery).lean();