fix(user): 普通用户接口不返回备注

- 用户侧 dto.User 移除 notes 字段，避免泄露管理员备注\n- 新增 dto.AdminUser 并调整 /admin/users 系列接口使用\n- 前端拆分 User/AdminUser，管理端用户页面使用 AdminUser\n- 更新契约测试：/api/v1/auth/me 响应不包含 notes

frontend/src/components/admin/user/UserAllowedGroupsModal.vue

@@ -39,10 +39,10 @@ import { ref, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { useAppStore } from '@/stores/app'
 import { adminAPI } from '@/api/admin'
-import type { User, Group } from '@/types'
+import type { AdminUser, Group } from '@/types'
 import BaseDialog from '@/components/common/BaseDialog.vue'
 
-const props = defineProps<{ show: boolean, user: User | null }>()
+const props = defineProps<{ show: boolean, user: AdminUser | null }>()
 const emit = defineEmits(['close', 'success']); const { t } = useI18n(); const appStore = useAppStore()
 
 const groups = ref<Group[]>([]); const selectedIds = ref<number[]>([]); const loading = ref(false); const submitting = ref(false)
@@ -56,4 +56,4 @@ const handleSave = async () => {
     appStore.showSuccess(t('admin.users.allowedGroupsUpdated')); emit('success'); emit('close')
   } catch (error) { console.error('Failed to update allowed groups:', error) } finally { submitting.value = false }
 }
-</script>
+</script>