Update public/js/app.js

public/js/app.js

@@ -41,6 +41,9 @@ onSessionChange((event, data) => {
     if (data.id === currentSessionId) renderSession(data);
   }
   if (event === 'created') {
+    // Set activeSession immediately before switchSession so any pending
+    // send (from triggerCenterSend) uses the correct session id.
+    setActiveSession(data.id);
     switchSession(data.id);
     if (window.innerWidth < 768) collapseSidebar();
   }
@@ -69,10 +72,10 @@ function triggerCenterSend() {
   clearFilePreviewRow();
 
   if (!currentSessionId) {
-    // Create session first, then send
+    // Create session first, then send after both 'created' AND 'switched' have fired
     const pendingText = text, pendingAttach = attachments;
     const unsub = onSessionChange((ev, s) => {
-      if (ev !== 'created') return;
+      if (ev !== 'switched' || !s) return; // wait for switched (which sets activeSessionId)
       unsub();
       doSend(pendingText, pendingAttach);
     });