chore: 批量更新导入路径到 features 架构

- 更新所有 admin API 文件导入路径
- 更新所有 features 中 Vue 文件的导入路径
- 修复 ChatAttachmentImage 组件导入
- 修复 auth 模块部分导入路径

剩余 ~190 个类型错误待修复（主要是缺失的模块）

frontend/src/features/admin/views/AdminDisputesView.vue

@@ -2,8 +2,8 @@
 import { ElMessage } from 'element-plus'
 import { onMounted, ref } from 'vue'
 
-import { arbitrateDispute, fetchAdminDisputes, type Dispute } from '@/api/disputes'
-import { fetchAdminFileBlob } from '@/api/files'
+import { arbitrateDispute, fetchAdminDisputes, type Dispute } from '@/features/disputes'
+import { fetchAdminFileBlob } from '@/shared/api/files'
 import { disputeStatusLabel } from '@/utils/statusLabels'
 import { formatDateTime } from '@/utils/time'