Add export functionality to CleanerPage that allows users to export
the currently displayed validation results to an Excel file.
- Add ExportResultItem and ExportResultResponse types
- Create ResultExporter service using ExcelJS
- Register cleaner:exportResults IPC handler
- Add exportResults method to preload API
- Connect export button in CleanerPage to export handler
Export features:
- Exports filtered results (respecting manager/visibility filters)
- Includes selection status column
- Saves to app data directory/exports/校验结果.xlsx
Co-Authored-By: Claude (glm-5) <noreply@anthropic.com>
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