wip: add tools to agent control and improve tool class

frontend/src/runs.js

@@ -95,6 +95,7 @@ async function init() {
   runs = res.runs || [];
   
   // Listen for run events
+  if (unsubscribeRunEvents) unsubscribeRunEvents();
   unsubscribeRunEvents = backend.onAction('run-event', updateRun);
 }