Enhance navigation and UI components for improved user experience

- Added new AppHeader and BottomNav components for better navigation across the application.
- Introduced AreaTabs for product area navigation and integrated RoleSwitcher for user role management.
- Created CartButton component to display cart status and item count.
- Implemented UserMenu with login/logout functionality and user greeting.
- Added Badge component for notifications and status indicators.
- Updated layout to accommodate new navigation components and ensure mobile responsiveness.
- Created product detail demo page to showcase design patterns and features.
- Enhanced existing components with improved styling and functionality.

app/components/ui/badge/Badge.vue

@@ -0,0 +1,24 @@
+<script setup lang="ts">
+import { type HTMLAttributes, computed } from 'vue'
+import { type BadgeVariants, badgeVariants } from '.'
+import { cn } from '@/lib/utils'
+
+interface Props {
+  variant?: BadgeVariants['variant']
+  class?: HTMLAttributes['class']
+}
+
+const props = defineProps<Props>()
+
+const delegatedProps = computed(() => {
+  const { class: _, ...delegated } = props
+
+  return delegated
+})
+</script>
+
+<template>
+  <div :class="cn(badgeVariants({ variant }), props.class)" v-bind="delegatedProps">
+    <slot />
+  </div>
+</template>

app/components/ui/badge/index.ts

@@ -0,0 +1,24 @@
+import { type VariantProps, cva } from 'class-variance-authority'
+
+export { default as Badge } from './Badge.vue'
+
+export const badgeVariants = cva(
+  'inline-flex items-center rounded-md border px-2.5 py-0.5 text-xs font-semibold transition-colors focus:outline-none focus:ring-2 focus:ring-ring focus:ring-offset-2',
+  {
+    variants: {
+      variant: {
+        default: 'border-transparent bg-primary text-primary-foreground shadow hover:bg-primary/80',
+        secondary: 'border-transparent bg-secondary text-secondary-foreground hover:bg-secondary/80',
+        destructive: 'border-transparent bg-destructive text-destructive-foreground shadow hover:bg-destructive/80',
+        outline: 'text-foreground',
+        success: 'border-transparent bg-green-500 text-white shadow hover:bg-green-600',
+        warning: 'border-transparent bg-yellow-500 text-white shadow hover:bg-yellow-600',
+      },
+    },
+    defaultVariants: {
+      variant: 'default',
+    },
+  }
+)
+
+export type BadgeVariants = VariantProps<typeof badgeVariants>