fix: clear history selection on backup return

[Johnson-zs]

fix: clear history selection on backup return

1. Root cause: ZipFileProcessResultWidget::backPage() only emitted
   changeWidget to switch page, missing clearWidget signal to reset
   selection states, leaving history selection after returning
2. Fix: emit TransferHelper::instance()->clearWidget() in backPage(),
   consistent with ResultDisplayWidget::nextPage() in transfer flow
3. Impact: backup result back now clears all selection controls, no
   change to page-switch logic, no effect on transfer flow

Log: fix history selection not cleared after backup result back

Influence:

1. Test backup complete then back to selection page, verify selections
   are cleared
2. Test transfer flow back to selection page, verify no regression
3. Test backup failed then back, verify selection cleared

fix: 修复导出返回选择页时历史选择未清空

1. 根因：ZipFileProcessResultWidget::backPage() 仅发出 changeWidget
   切换页面，缺少 clearWidget 信号清空选择状态，导致返回后历史选择残留
2. 方案：在 backPage() 中补充 emit clearWidget 信号，与传输流程
   resultdisplay.cpp 现有范式保持一致
3. 影响：导出返回时清空各选择控件状态，不改变页面切换逻辑，不影响
   传输流程

Log: 修复导出完成返回选择页时历史选择未清空的问题

Influence:

1. 测试导出完成后返回选择页，验证各选择项已清空
2. 测试传输流程返回选择页，验证无回归
3. 测试导出失败后返回，验证选择项已清空

PMS: BUG-262109

Summary by Sourcery

Bug Fixes:

• Clear backup result selections when returning to the selection page.

[deepin-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Johnson-zs

The full list of commands accepted by this bot can be found here.

Details

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• debian/deepin/OWNERS

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[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Backup result navigation now clears selection state by emitting a clearWidget signal when returning to the selection page, aligning backup behavior with the existing transfer flow pattern.

Sequence diagram for clearing backup selections on return

sequenceDiagram
    participant BackupResult as ZipFileProcessResultWidget
    participant TransferHelper
    participant ChoosePage as SelectionPage

    BackupResult->>TransferHelper: changeWidget(PageName::choosewidget)
    TransferHelper->>ChoosePage: Navigate to selection page
    BackupResult->>TransferHelper: clearWidget()
    TransferHelper->>ChoosePage: Clear selection controls

Loading

File-Level Changes

Change	Details	Files
Ensure backup result 'back' navigation resets selection state instead of preserving previous choices.	Updated ZipFileProcessResultWidget::backPage() to emit clearWidget in addition to changeWidget when navigating back to the selection page Aligned backup flow behavior with ResultDisplayWidget::nextPage() pattern in the transfer flow, ensuring selection widgets are consistently cleared on page transitions	src/plugins/data-transfer/core/gui/getbackup/zipfileprocessresultwidget.cpp

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