chore: update Tailwind CSS from 3.4.15, to 4.1.11

- Changed the PostCSS configuration to use '@tailwindcss/postcss' instead of 'tailwindcss'.
- Deleted the Tailwind configuration file as it is no longer needed.

app/library/albums/page.tsx

@@ -109,7 +109,7 @@ export default function AlbumsPage() {
   return (
     <div className="h-full px-4 py-6 lg:px-8">
       <Tabs defaultValue="music" className="h-full flex flex-col space-y-6">
-        <TabsContent value="music" className="border-none p-0 outline-none flex flex-col flex-grow">
+        <TabsContent value="music" className="border-none p-0 outline-hidden flex flex-col grow">
           <div className="flex items-center justify-between mb-4">
             <div className="space-y-1">
               <p className="text-2xl font-semibold tracking-tight">
@@ -150,7 +150,7 @@ export default function AlbumsPage() {
 
           <Separator className="my-4" />
           
-          <div className="relative flex-grow">
+          <div className="relative grow">
             <ScrollArea className="h-full">
               <div className="h-full overflow-y-auto">
                 <div className="grid grid-cols-2 sm:grid-cols-3 md:grid-cols-4 lg:grid-cols-5 xl:grid-cols-6 2xl:grid-cols-7 gap-4 p-4 pb-8">