Fix: strictly filter flows by agent UUID to prevent org-level data pollution

proxy/backoneClientCore.js

@@ -37,7 +37,8 @@ function fixDates(obj) {
 async function backoneFetch(endpoint, params = {}, agentUuid = null, siteUuid = null) {
   if (agentUuid) {
     const agentId = agentMap[agentUuid];
-    if (agentId) {
+    // Only use filter_agents if agentId is a number or numeric string
+    if (agentId && !isNaN(Number(agentId))) {
       params.filter_agents = `[${agentId}]`;
     } else {
       params.settings_agent = agentUuid;