chore: revert standalone output and harden home page auth check

src/app/page.tsx

@@ -15,11 +15,16 @@ export default function Home() {
     useEffect(() => {
         // Check session
         const checkUser = async () => {
-            const { data: { session } } = await supabase.auth.getSession();
-            setUser(session?.user ?? null);
-            if (session?.user) {
-                fetchCollection();
-            } else {
+            try {
+                const { data: { session }, error } = await supabase.auth.getSession();
+                if (error) {
+                    console.error('Session retrieval error:', error);
+                }
+                setUser(session?.user ?? null);
+            } catch (err) {
+                console.error('Fatal error checking user:', err);
+                setUser(null);
+            } finally {
                 setIsLoading(false);
             }
         };