## ADDED Requirements

### Requirement: Scene-Specific Export Task Pages

The admin frontend SHALL replace the single generic export task list entry with three scene-specific export task pages: 导出设备, 导出IOT卡, and 导出订单.

#### Scenario: Render scene-specific export task navigation

- **GIVEN** 用户打开资产管理下的导出管理菜单
- **WHEN** 系统渲染导出任务导航
- **THEN** 系统 MUST provide separate entries for 导出设备, 导出IOT卡, and 导出订单
- **AND** 系统 MUST NOT expose the old generic 导出列表 menu entry as the primary navigation entry

#### Scenario: Query device export tasks

- **GIVEN** 用户打开导出设备页面
- **WHEN** 页面查询导出任务列表
- **THEN** 系统 MUST call `GET /api/admin/export-tasks` with `scene=device`
- **AND** 用户 MUST NOT be able to change this page to query `iot_card` or `order` tasks through a scene selector

#### Scenario: Query IOT card export tasks

- **GIVEN** 用户打开导出IOT卡页面
- **WHEN** 页面查询导出任务列表
- **THEN** 系统 MUST call `GET /api/admin/export-tasks` with `scene=iot_card`
- **AND** 用户 MUST NOT be able to change this page to query `device` or `order` tasks through a scene selector

#### Scenario: Query order export tasks

- **GIVEN** 用户打开导出订单页面
- **WHEN** 页面查询导出任务列表
- **THEN** 系统 MUST call `GET /api/admin/export-tasks` with `scene=order`
- **AND** 用户 MUST NOT be able to change this page to query `device` or `iot_card` tasks through a scene selector

### Requirement: Remove Export Scene Filtering From Scene Pages

Scene-specific export task pages SHALL remove user-facing export scene filtering because each page has exactly one fixed scene.

#### Scenario: Hide scene search field

- **GIVEN** 用户打开任一导出任务场景页面
- **WHEN** 页面渲染搜索表单
- **THEN** 页面 MUST NOT display a 导出场景 search item
- **AND** reset and search actions MUST keep the page's fixed `scene` unchanged

#### Scenario: Avoid redundant scene column

- **GIVEN** 用户打开任一导出任务场景页面
- **WHEN** 页面渲染任务表格
- **THEN** 页面 SHOULD remove or hide the 场景 column by default
- **AND** 页面 MUST continue to display task number, status, progress, format, row counts, shard progress, error message, and created time

### Requirement: Scene-Specific Export Task Permissions

The admin frontend MUST gate each export task page and page action with scene-specific permission codes so that device, IOT card, and order export task permissions are independent.

#### Scenario: Gate scene pages independently

- **GIVEN** 用户 only has `export_task:device:list`
- **WHEN** 系统渲染导出管理菜单
- **THEN** 系统 MUST show 导出设备
- **AND** 系统 MUST NOT show 导出IOT卡 or 导出订单 unless the user also has `export_task:iot_card:list` or `export_task:order:list`

#### Scenario: Gate device export task actions independently

- **GIVEN** 用户打开导出设备页面
- **WHEN** 页面渲染详情、下载 or 取消操作
- **THEN** 系统 MUST use `export_task:device:detail`, `export_task:device:download`, and `export_task:device:cancel` respectively
- **AND** 系统 MUST NOT treat IOT card or order export task action permissions as sufficient for device actions

#### Scenario: Gate IOT card export task actions independently

- **GIVEN** 用户打开导出IOT卡页面
- **WHEN** 页面渲染详情、下载 or 取消操作
- **THEN** 系统 MUST use `export_task:iot_card:detail`, `export_task:iot_card:download`, and `export_task:iot_card:cancel` respectively
- **AND** 系统 MUST NOT treat device or order export task action permissions as sufficient for IOT card actions

#### Scenario: Gate order export task actions independently

- **GIVEN** 用户打开导出订单页面
- **WHEN** 页面渲染详情、下载 or 取消操作
- **THEN** 系统 MUST use `export_task:order:detail`, `export_task:order:download`, and `export_task:order:cancel` respectively
- **AND** 系统 MUST NOT treat device or IOT card export task action permissions as sufficient for order actions

#### Scenario: Keep business export buttons independent

- **GIVEN** 用户分别访问设备管理、IOT 卡管理 and 订单列表
- **WHEN** 页面渲染创建导出任务按钮
- **THEN** 设备管理 MUST use `devices:export`
- **AND** IOT 卡管理 MUST use `iot_card:export`
- **AND** 订单列表 MUST use `orders:export`
- **AND** possessing one of these permissions MUST NOT reveal or enable the other two export buttons

### Requirement: Scene-Aware Export Task Detail Permissions

The export task detail page SHALL apply detail, download, and cancel permissions according to the task's scene.

#### Scenario: Enforce scene permissions on direct detail access

- **GIVEN** 用户直接打开某个导出任务详情 URL
- **WHEN** 系统加载任务详情 and reads the returned `scene`
- **THEN** 系统 MUST require the matching scene detail permission before showing the detail content
- **AND** 系统 MUST use the matching scene download and cancel permissions before showing detail-page buttons

#### Scenario: Prevent cross-scene action leakage

- **GIVEN** 用户 has only order export task download permission
- **AND** 用户打开 a completed device export task detail
- **WHEN** 页面渲染详情操作区
- **THEN** 页面 MUST NOT show the device task download button
- **AND** 页面 MUST NOT allow downloading that device task through the order download permission
