feat: P3阶段完成 - 全部模块迁移完成 🎉

## P3.1: 争议仲裁模块（disputes）✅
- API: disputes.ts
- 模块导出

## P3.2: 卖家中心模块（seller）✅
- Views: 4个页面
- Composables: usePublishForm, usePublishDraft
- 模块导出

## P3.3: 管理后台模块（admin）✅
- API: 8个文件（adminAuth, adminDashboard, adminUsers等）
- Views: 15个管理页面
- Composables: useAdminTable, useAdminPaginatedTable
- Components: 管理端组件
- 模块导出

---

## 🎉 Features 架构迁移全部完成！

### 最终统计
- ✅ P0: shared（基础设施）- 22个文件
- ✅ P1: wallet, chats, orders - 24个文件
- ✅ P2: listings, auth - 35个文件
- ✅ P3: seller, disputes, admin - 47个文件

**总计：** 9个模块，128个文件完成迁移

### 新架构
```
frontend/src/
├── features/          # 9个业务模块 ✅
│   ├── wallet/       ✅
│   ├── chats/        ✅
│   ├── orders/       ✅ (已重构)
│   ├── listings/     ✅
│   ├── auth/         ✅
│   ├── seller/       ✅
│   ├── disputes/     ✅
│   └── admin/        ✅
└── shared/           ✅
```

下一步：清理旧文件、更新路由配置

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

frontend/src/features/admin/composables/useAdminPaginatedTable.ts

@@ -0,0 +1,52 @@
+import { ref, type Ref } from 'vue'
+
+interface PaginatedResult<T> {
+  items: T[]
+  total: number
+}
+
+interface AdminPaginatedTableOptions<T> {
+  fetchFn: (page: number, pageSize: number) => Promise<PaginatedResult<T>>
+  defaultPageSize?: number
+  immediate?: boolean
+}
+
+interface AdminPaginatedTableResult<T> {
+  loading: Ref<boolean>
+  data: Ref<T[]>
+  total: Ref<number>
+  currentPage: Ref<number>
+  currentPageSize: Ref<number>
+  load: () => Promise<void>
+  handleSizeChange: () => void
+}
+
+export function useAdminPaginatedTable<T>(options: AdminPaginatedTableOptions<T>): AdminPaginatedTableResult<T> {
+  const loading = ref(false)
+  const data = ref<T[]>([]) as Ref<T[]>
+  const total = ref(0)
+  const currentPage = ref(1)
+  const currentPageSize = ref(options.defaultPageSize || 20)
+
+  async function load() {
+    loading.value = true
+    try {
+      const result = await options.fetchFn(currentPage.value, currentPageSize.value)
+      data.value = result.items
+      total.value = result.total
+    } finally {
+      loading.value = false
+    }
+  }
+
+  function handleSizeChange() {
+    currentPage.value = 1
+    load()
+  }
+
+  if (options.immediate !== false) {
+    load()
+  }
+
+  return { loading, data, total, currentPage, currentPageSize, load, handleSizeChange }
+}

frontend/src/features/admin/composables/useAdminTable.ts

@@ -0,0 +1,42 @@
+import { ref, type Ref } from 'vue'
+
+interface AdminQueryOptions<T> {
+  fetchFn: () => Promise<T>
+  immediate?: boolean
+  initialData?: T
+}
+
+interface AdminQueryResult<T> {
+  loading: Ref<boolean>
+  error: Ref<string | null>
+  data: Ref<T>
+  load: () => Promise<void>
+}
+
+export function useAdminQuery<T>(options: AdminQueryOptions<T>): AdminQueryResult<T> {
+  const loading = ref(false)
+  const error = ref<string | null>(null)
+  const data = ref<T>(options.initialData as T) as Ref<T>
+
+  async function load() {
+    loading.value = true
+    error.value = null
+    try {
+      data.value = await options.fetchFn()
+    } catch (e) {
+      error.value = e instanceof Error ? e.message : '加载失败'
+      console.error('Failed to load data:', e)
+    } finally {
+      loading.value = false
+    }
+  }
+
+  if (options.immediate !== false) {
+    load()
+  }
+
+  return { loading, error, data, load }
+}
+
+// 保持向后兼容
+export const useAdminTable = useAdminQuery