implement logout dialog, fix unused imports

src/components/ui/dialog/DialogDescription.vue

@@ -0,0 +1,15 @@
+<script setup lang="ts">
+import { DialogDescription as DialogDescriptionPrimitive } from 'radix-vue'
+import { cn } from '@/lib/utils'
+import type { HTMLAttributes } from 'vue'
+
+const props = defineProps<{
+  class?: HTMLAttributes['class']
+}>()
+</script>
+
+<template>
+  <DialogDescriptionPrimitive :class="cn('text-sm text-muted-foreground', props.class)">
+    <slot />
+  </DialogDescriptionPrimitive>
+</template>