Refactor UI components for improved styling and user experience

- Updated UserMenu.vue to enhance button and avatar styles for a more modern look.
- Adjusted alert component styles in index.ts for consistent rounded corners.
- Simplified loading state markup in order confirmation page for cleaner code.
- Enhanced button and link text for better clarity and user navigation.

These changes aim to improve the overall aesthetic and usability of the application, ensuring a more cohesive user experience.

app/components/ui/alert/index.ts

@@ -6,15 +6,14 @@ export { default as AlertDescription } from './AlertDescription.vue'
 export { default as AlertTitle } from './AlertTitle.vue'
 
 export const alertVariants = cva(
-  'relative w-full rounded-lg border p-4 flex items-center gap-3 [&>svg]:shrink-0 [&>svg]:text-foreground',
+  'relative w-full rounded-[25px] border p-4 flex items-center gap-3 [&>svg]:shrink-0 [&>svg]:text-foreground',
   {
     variants: {
       variant: {
         default: 'bg-background text-foreground',
         destructive:
           'border-destructive/50 text-destructive dark:border-destructive [&>svg]:text-destructive',
-        error:
-          'bg-white/15 border-l-4 border-warning text-white [&>svg]:text-warning',
+        error: 'bg-white/15 border-l-4 border-warning text-white [&>svg]:text-warning',
       },
     },
     defaultVariants: {