refactor: standardize quotation marks across all files and improve code consistency

components/ui/skeleton.tsx

@@ -1,13 +1,13 @@
-import { cn } from '@/lib/utils'
+import { cn } from "@/lib/utils";
 
-function Skeleton({ className, ...props }: React.ComponentProps<'div'>) {
+function Skeleton({ className, ...props }: React.ComponentProps<"div">) {
   return (
     <div
       data-slot="skeleton"
-      className={cn('bg-accent animate-pulse rounded-md', className)}
+      className={cn("bg-accent animate-pulse rounded-md", className)}
       {...props}
     />
-  )
+  );
 }
 
-export { Skeleton }
+export { Skeleton };