style: change brand logo in app-header.tsx from lg to md size (#103)

Author: Jightning

components/app-header.tsx

@@ -6,7 +6,7 @@ export function AppHeader() {
   return (
     <header className="sticky top-0 z-50 w-full border-b border-border bg-background/95 backdrop-blur supports-[backdrop-filter]:bg-background/60">
       <div className="container m-auto flex h-24 max-w-7xl items-center justify-between px-4 sm:h-28">
-        <BrandLogo priority size="lg" className="shrink-0" />
+        <BrandLogo priority size="md" className="shrink-0" />
 
         <div className="flex gap-4">
           <LanguageSwitcher />