feat: refine letters UI

app/books/gg/[chapter]/page.tsx

@@ -45,7 +45,7 @@ export default async function GgChapterPage({
 
   return (
     <div className="min-h-screen bg-background">
-      <PageHeader sticky wide>
+      <PageHeader sticky>
         <Link
           href="/books/gg"
           className="text-sm text-muted-foreground hover:text-foreground transition-colors"
@@ -60,7 +60,7 @@ export default async function GgChapterPage({
         </h1>
       </PageHeader>
 
-      <div className="w-full md:max-w-6xl mx-auto flex">
+      <div className="max-w-5xl mx-auto flex">
         {/* Left sidebar */}
         <GgSidebar items={sidebarItems} currentSlug={slug} />