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/UserApiKeysModal.vue

@@ -32,10 +32,10 @@ import { ref, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { adminAPI } from '@/api/admin'
 import { formatDateTime } from '@/utils/format'
-import type { User, ApiKey } from '@/types'
+import type { AdminUser, ApiKey } 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 }>()
 defineEmits(['close']); const { t } = useI18n()
 const apiKeys = ref<ApiKey[]>([]); const loading = ref(false)
 
@@ -44,4 +44,4 @@ const load = async () => {
   if (!props.user) return; loading.value = true
   try { const res = await adminAPI.users.getUserApiKeys(props.user.id); apiKeys.value = res.items || [] } catch (error) { console.error('Failed to load API keys:', error) } finally { loading.value = false }
 }
-</script>
+</script>