create frontend directory

frontend/components/ui/scroll-area/ScrollArea.vue

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+<script setup lang="ts">
+import type { HTMLAttributes } from 'vue'
+import { reactiveOmit } from '@vueuse/core'
+import {
+  ScrollAreaCorner,
+  ScrollAreaRoot,
+  type ScrollAreaRootProps,
+  ScrollAreaViewport,
+} from 'reka-ui'
+import { cn } from '@/lib/utils'
+import ScrollBar from './ScrollBar.vue'
+
+const props = defineProps<ScrollAreaRootProps & { class?: HTMLAttributes['class'] }>()
+
+const delegatedProps = reactiveOmit(props, 'class')
+</script>
+
+<template>
+  <ScrollAreaRoot
+    data-slot="scroll-area"
+    v-bind="delegatedProps"
+    :class="cn('relative', props.class)"
+  >
+    <ScrollAreaViewport
+      data-slot="scroll-area-viewport"
+      class="focus-visible:ring-ring/50 size-full rounded-[inherit] transition-[color,box-shadow] outline-none focus-visible:ring-[3px] focus-visible:outline-1"
+    >
+      <slot />
+    </ScrollAreaViewport>
+    <ScrollBar />
+    <ScrollAreaCorner />
+  </ScrollAreaRoot>
+</template>

frontend/components/ui/scroll-area/ScrollBar.vue

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+<script setup lang="ts">
+import type { HTMLAttributes } from 'vue'
+import { reactiveOmit } from '@vueuse/core'
+import { ScrollAreaScrollbar, type ScrollAreaScrollbarProps, ScrollAreaThumb } from 'reka-ui'
+import { cn } from '@/lib/utils'
+
+const props = withDefaults(defineProps<ScrollAreaScrollbarProps & { class?: HTMLAttributes['class'] }>(), {
+  orientation: 'vertical',
+})
+
+const delegatedProps = reactiveOmit(props, 'class')
+</script>
+
+<template>
+  <ScrollAreaScrollbar
+    data-slot="scroll-area-scrollbar"
+    v-bind="delegatedProps"
+    :class="
+      cn('flex touch-none p-px transition-colors select-none',
+         orientation === 'vertical'
+           && 'h-full w-2.5 border-l border-l-transparent',
+         orientation === 'horizontal'
+           && 'h-2.5 flex-col border-t border-t-transparent',
+         props.class)"
+  >
+    <ScrollAreaThumb
+      data-slot="scroll-area-thumb"
+      class="bg-border relative flex-1 rounded-full"
+    />
+  </ScrollAreaScrollbar>
+</template>

frontend/components/ui/scroll-area/index.ts

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+export { default as ScrollArea } from './ScrollArea.vue'
+export { default as ScrollBar } from './ScrollBar.vue'