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/separator/Separator.vue

@@ -0,0 +1,32 @@
+<script setup lang="ts">
+import { type HTMLAttributes, computed } from 'vue'
+import { SeparatorRoot, type SeparatorRootProps } from 'reka-ui'
+import { cn } from '@/lib/utils'
+
+const props = withDefaults(
+  defineProps<SeparatorRootProps & { class?: HTMLAttributes['class'] }>(),
+  {
+    orientation: 'horizontal',
+    decorative: true,
+  }
+)
+
+const delegatedProps = computed(() => {
+  const { class: _, ...delegated } = props
+
+  return delegated
+})
+</script>
+
+<template>
+  <SeparatorRoot
+    v-bind="delegatedProps"
+    :class="
+      cn(
+        'shrink-0 bg-border',
+        props.orientation === 'horizontal' ? 'h-[1px] w-full' : 'h-full w-[1px]',
+        props.class
+      )
+    "
+  />
+</template>