fix: show canvas brand capsule background

app/canvas/[id]/page.tsx

@@ -7790,9 +7790,12 @@ export default function CanvasEditorPage({ params }: PageProps) {
   }
 
   const brandEntry = (
-    <div className="absolute top-4 left-4 z-20">
+    <div
+      className="absolute top-4 left-4 z-20 rounded-full px-1 py-1 shadow-[0_10px_26px_rgba(15,23,42,0.10)]"
+      style={{ backgroundColor: "var(--background)" }}
+    >
       <Button
-        className="h-10 gap-2 rounded-full border-0 bg-background px-3 shadow-none hover:bg-background hover:text-foreground"
+        className="h-9 gap-2 rounded-full border-0 bg-transparent px-2.5 shadow-none hover:bg-transparent hover:text-foreground"
         onClick={goHome}
         variant="ghost"
       >