fix: preserve primary image aspect ratio

src/app/page.tsx

@@ -92,6 +92,10 @@ function ProjectBrief({ session }: { session: GenSession }) {
   const [previewOpen, setPreviewOpen] = useState(false);
   const [primaryAspectRatio, setPrimaryAspectRatio] = useState('1 / 1');
 
+  useEffect(() => {
+    setPrimaryAspectRatio('1 / 1');
+  }, [primaryImage?.url]);
+
   return (
     <section className="project-brief-panel">
       <div className="flex items-start justify-between gap-4">