feat: 新增退款凭证

openspec/changes/update-refund-voucher-multi-image/proposal.md

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+# Change: Update Refund Voucher Multi Image Behavior
+
+## Why
+
+退款管理需要更清晰地展示退款凭证，并支持一次退款记录关联多张凭证图片，便于财务核验。创建退款申请选择订单时也应只允许选择已支付订单，避免对未支付订单发起退款。
+
+## What Changes
+
+- 退款详情中直接展示退款凭证图片，点击图片后可放大预览。
+- 创建退款申请的订单号搜索/选择请求必须增加 `payment_status: 2` 条件。
+- 退款管理凭证上传支持多张图片，并将所有上传后的文件 key 以英文逗号拼接后放入 `refund_voucher_key` 参数。
+
+## Impact
+
+- Affected specs: `order-management`
+- Affected code:
+  - Refund detail voucher display and image preview behavior
+  - Create refund request order selector query params
+  - Refund management voucher upload component and submit payload
+- Breaking changes: Refund voucher payload field for this flow remains `refund_voucher_key` and supports one or more uploaded image keys separated by English commas.

openspec/changes/update-refund-voucher-multi-image/specs/order-management/spec.md

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+## ADDED Requirements
+
+### Requirement: Refund Detail Inline Voucher Preview
+
+The system SHALL display refund voucher images directly in the refund detail page when voucher file keys exist, and each displayed image SHALL support click-to-enlarge preview. Refund voucher viewing from the refund list SHALL be controlled by the permission code `refund:view_voucher`.
+
+#### Scenario: Display and enlarge refund voucher in detail
+
+- **GIVEN** 用户打开退款详情页
+- **AND** 退款详情数据包含一个或多个退款凭证文件 key
+- **WHEN** 页面渲染退款凭证区域
+- **THEN** 系统 MUST 直接展示对应的凭证图片
+- **AND** 用户点击任一凭证图片后，系统 MUST 放大预览该图片
+
+#### Scenario: Hide voucher images when no voucher exists
+
+- **GIVEN** 用户打开退款详情页
+- **WHEN** 退款详情数据不包含退款凭证文件 key
+- **THEN** 系统 MUST NOT 展示空的凭证图片占位
+- **AND** 系统 MAY display `-` or equivalent empty-state text for the voucher field
+
+#### Scenario: Show refund voucher list action with permission
+
+- **GIVEN** 用户正在查看退款管理列表
+- **AND** 某条退款记录存在 `refund_voucher_key`
+- **AND** 当前用户拥有 `refund:view_voucher` 权限编码
+- **WHEN** 系统渲染该行操作列
+- **THEN** 系统 MUST show the `查看退款凭证` action
+
+#### Scenario: Hide refund voucher list action without permission
+
+- **GIVEN** 用户正在查看退款管理列表
+- **AND** 某条退款记录存在 `refund_voucher_key`
+- **AND** 当前用户不拥有 `refund:view_voucher` 权限编码
+- **WHEN** 系统渲染该行操作列
+- **THEN** 系统 MUST NOT show the `查看退款凭证` action
+
+### Requirement: Refund Application Paid Order Filtering
+
+The system SHALL restrict the order number search/select request in create refund application to paid orders by including `payment_status: 2` in the query parameters.
+
+#### Scenario: Search selectable orders for refund application
+
+- **GIVEN** 用户正在创建退款申请
+- **WHEN** 用户通过订单号搜索/选择订单
+- **THEN** 系统 MUST call the order search/list API with `payment_status: 2`
+- **AND** 未支付、已取消或其他非已支付状态订单 MUST NOT be returned as selectable refund orders by the frontend query
+
+### Requirement: Refund Application Zero Amount
+
+The system SHALL allow the requested refund amount in create refund application to be `0`, while still preventing negative amounts and amounts greater than the actual received amount.
+
+#### Scenario: Submit zero requested refund amount
+
+- **GIVEN** 用户正在创建退款申请
+- **AND** 用户已选择可退款订单
+- **WHEN** 用户输入申请退款金额 `0`
+- **THEN** 系统 MUST allow the amount validation to pass
+- **AND** 系统 MUST submit `requested_refund_amount` as `0`
+
+#### Scenario: Block negative requested refund amount
+
+- **GIVEN** 用户正在创建退款申请
+- **WHEN** 用户输入小于 `0` 的申请退款金额
+- **THEN** 系统 MUST prevent submission
+- **AND** 系统 MUST 提示申请退款金额不能小于 `0`
+
+#### Scenario: Block requested refund amount above actual received amount
+
+- **GIVEN** 用户正在创建退款申请
+- **AND** 已选订单存在实收金额
+- **WHEN** 用户输入的申请退款金额大于实收金额
+- **THEN** 系统 MUST prevent submission
+- **AND** 系统 MUST 提示申请退款金额不能大于实收金额
+
+### Requirement: Refund Management Multi Image Voucher Upload
+
+The system SHALL allow multiple refund voucher images in any browser-recognized image format to be uploaded in refund management and SHALL submit all uploaded file keys in the `refund_voucher_key` parameter as a comma-separated string.
+
+#### Scenario: Submit multiple uploaded voucher images
+
+- **GIVEN** 用户正在退款管理中创建或提交退款相关记录
+- **AND** 用户上传了多张退款凭证图片
+- **WHEN** 每张图片上传成功并返回文件 key
+- **AND** 用户提交表单
+- **THEN** 系统 MUST join the uploaded file keys with English commas
+- **AND** 系统 MUST put the joined string into `refund_voucher_key`
+- **AND** `refund_voucher_key` MUST look like `attachments/a.jpg,attachments/b.jpg` when multiple files exist
+
+#### Scenario: Upload any image format refund voucher without frontend size limit
+
+- **GIVEN** 用户正在创建退款申请
+- **WHEN** 用户选择或拖入任意浏览器识别为图片类型的退款凭证
+- **THEN** 系统 MUST NOT reject the file based on frontend file size checks
+- **AND** 系统 MUST accept the file when its MIME type starts with `image/`
+
+#### Scenario: Submit single uploaded voucher image
+
+- **GIVEN** 用户正在退款管理中创建或提交退款相关记录
+- **AND** 用户只上传了一张退款凭证图片
+- **WHEN** 用户提交表单
+- **THEN** 系统 MUST put that single file key into `refund_voucher_key` without a trailing comma
+
+#### Scenario: Block submission without required voucher image
+
+- **GIVEN** 退款管理表单要求上传退款凭证
+- **WHEN** 用户未上传任何凭证图片并尝试提交
+- **THEN** 系统 MUST prevent submission
+- **AND** 系统 MUST 提示用户上传退款凭证

openspec/changes/update-refund-voucher-multi-image/tasks.md

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+## 1. Implementation
+
+- [x] 1.1 Update refund detail to render voucher images inline when voucher keys exist.
+- [x] 1.2 Add click-to-preview/enlarge behavior for refund detail voucher images.
+- [x] 1.3 Add `payment_status: 2` to the order number search/select request used by create refund application.
+- [x] 1.4 Update refund management voucher upload to allow multiple image uploads.
+- [x] 1.5 Submit uploaded voucher file keys joined by English commas in `refund_voucher_key`.
+- [x] 1.6 Validate that at least one voucher image is uploaded before submission when voucher is required.
+- [x] 1.7 Verify refund detail display, order selector filtering, and multi-image payload behavior.
+- [x] 1.8 Allow requested refund amount `0` while blocking negative and over-actual amounts.