fix(avatar) : add explicit import for useAvatarService in profile page

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

frontend/pages/profile.vue

@@ -48,6 +48,8 @@
 </template>
 
 <script setup lang="ts">
+import { useAvatarService } from '~/composables/useAvatarService'
+
 const auth = useAuthStore()
 const { upload, remove } = useAvatarService()