Reapply "fix: windows title bar only"

This reverts commit 7e05b8f13b.

src/pages/_layout.tsx

@@ -193,6 +193,8 @@ const Layout = () => {
       decorated,
       "| showing:",
       !decorated,
+      "| theme mode:",
+      mode,
     );
     if (!decorated) {
       return (
@@ -202,7 +204,7 @@ const Layout = () => {
       );
     }
     return null;
-  }, [decorated]);
+  }, [decorated, mode]);
 
   useEffect(() => {
     setThemeReady(true);