frontend/src/views/auth/OAuthCallbackView.vue

<template>
  <div class="min-h-screen bg-gray-50 px-4 py-10 dark:bg-dark-900">
    <div class="mx-auto max-w-2xl">
      <div class="card p-6">
        <h1 class="text-lg font-semibold text-gray-900 dark:text-white">OAuth Callback</h1>
        <p class="mt-2 text-sm text-gray-600 dark:text-gray-400">
          Copy the <code>code</code> (and <code>state</code> if needed) back to the admin
          authorization flow.
        </p>

        <div class="mt-6 space-y-4">
          <div>
            <label class="input-label">{{ t('auth.oauth.code') }}</label>
            <div class="flex gap-2">
              <input class="input flex-1 font-mono text-sm" :value="code" readonly />
              <button class="btn btn-secondary" type="button" :disabled="!code" @click="copy(code)">
                Copy
              </button>
            </div>
          </div>

          <div>
            <label class="input-label">{{ t('auth.oauth.state') }}</label>
            <div class="flex gap-2">
              <input class="input flex-1 font-mono text-sm" :value="state" readonly />
              <button
                class="btn btn-secondary"
                type="button"
                :disabled="!state"
                @click="copy(state)"
              >
                Copy
              </button>
            </div>
          </div>

          <div>
            <label class="input-label">{{ t('auth.oauth.fullUrl') }}</label>
            <div class="flex gap-2">
              <input class="input flex-1 font-mono text-xs" :value="fullUrl" readonly />
              <button
                class="btn btn-secondary"
                type="button"
                :disabled="!fullUrl"
                @click="copy(fullUrl)"
              >
                Copy
              </button>
            </div>
          </div>

          <div
            v-if="error"
            class="rounded-lg border border-red-200 bg-red-50 p-3 dark:border-red-700 dark:bg-red-900/30"
          >
            <p class="text-sm text-red-600 dark:text-red-400">{{ error }}</p>
          </div>
        </div>
      </div>
    </div>
  </div>
</template>

<script setup lang="ts">
import { computed } from 'vue'
import { useI18n } from 'vue-i18n'
import { useRoute } from 'vue-router'
import { useClipboard } from '@/composables/useClipboard'

const route = useRoute()
const { t } = useI18n()
const { copyToClipboard } = useClipboard()

const code = computed(() => (route.query.code as string) || '')
const state = computed(() => (route.query.state as string) || '')
const error = computed(
  () => (route.query.error as string) || (route.query.error_description as string) || ''
)

const fullUrl = computed(() => {
  if (typeof window === 'undefined') return ''
  return window.location.href
})

const copy = (value: string) => {
  if (!value) return
  copyToClipboard(value, 'Copied')
}
</script>