diff --git a/src/components/ChatPanel.tsx b/src/components/ChatPanel.tsx
index 8fd0c75..5ecf1f2 100644
--- a/src/components/ChatPanel.tsx
+++ b/src/components/ChatPanel.tsx
@@ -38,7 +38,7 @@ export default function ChatPanel({ projectId }: Props) {
         setMessages((prev) => [...prev, data as Message]);
       }
     });
-    return unsub;
+    return () => { unsub?.(); };
   }, [chatId]);
 
   useEffect(() => {
diff --git a/src/components/CreateProjectModal.tsx b/src/components/CreateProjectModal.tsx
index 928dc77..baa2c27 100644
--- a/src/components/CreateProjectModal.tsx
+++ b/src/components/CreateProjectModal.tsx
@@ -30,7 +30,7 @@ export default function CreateProjectModal({ onCreated, onClose }: Props) {
       const project = await createProject({
         name: name.trim(),
         slug,
-        description: description.trim() || null,
+        description: description.trim() || undefined,
       });
       onCreated(project);
     } catch (err) {