From 1b9e73fc42b103358a31c12f14f5a362a2eb355e Mon Sep 17 00:00:00 2001
From: Calvin Secrest <dev@calvinsecrest.com>
Date: Fri, 5 Sep 2025 18:37:24 -0400
Subject: [PATCH] fix: guard EventSource when API_BASE_URL unset

---
 frontend/chat-ui/src/components/ChatWindow.jsx | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/frontend/chat-ui/src/components/ChatWindow.jsx b/frontend/chat-ui/src/components/ChatWindow.jsx
index df6a5ec..0dfaccb 100644
--- a/frontend/chat-ui/src/components/ChatWindow.jsx
+++ b/frontend/chat-ui/src/components/ChatWindow.jsx
@@ -14,7 +14,8 @@ export default function ChatWindow() {
 
   useEffect(() => {
     if (!state.currentConversation) return;
-    const url = new URL(`${API_BASE_URL}/stream/${state.currentConversation.id}`);
+    const base = API_BASE_URL || window.location.origin;
+    const url = new URL(`/stream/${state.currentConversation.id}`, base);
     const apiKey = import.meta.env.VITE_API_KEY;
     if (apiKey) {
       url.searchParams.set('api_key', apiKey);