Outline Grouping Expand/Collapse Missing

[dikshasingh9170]

Before you submit this issue, have you checked the following

• Is this really a problem?
• I have searched the Github Issues for similar issues, but did not find anything.

Affected packages and versions

0.25.0

Reproduction link

Create an Excel workbook containing grouped rows or columns using Excel's Outline/Grouping feature.
Verify that expand/collapse controls are visible in Excel.
Save the workbook as .xlsx.
Import the workbook into UniverJS using importXLSXToSnapshotAsync.
Open the imported workbook in UniverJS.
Check the grouped rows/columns.

Expected behavior

Outline grouping information should be preserved after import.
Expand/collapse controls should be displayed for grouped rows and columns.
Users should be able to expand and collapse groups as they can in Excel.

Actual behavior

The workbook imports successfully.
Grouping information appears to be present.
Expand/collapse controls are not displayed.
Users cannot expand or collapse the imported groups.

System information

No response

[jikkai]

Check if outline supports import and export @DR-Univer

[jikkai]

We have confirmed that the outline feature supports import and export, so you must provide a minimal reproduction based on the community guidelines.