fix: remove duplicate status items in context menu (#32825)

[Rameshkumar31595]

This PR fixes issue #32825 by deduplicating sidebar context menu links before rendering.
It removes duplicate “status” entries such as “1 story with warnings” while preserving the menu order.
Fixes: #32825

[Rameshkumar31595]

Hi everyone

This PR fixes #32825
.

The duplication in the sidebar context menu was caused by repeated status aggregation ... both summary and individual story statuses were being shown.

The fix introduces a deduplication step in ContextMenu.tsx using a Map to filter out repeated link IDs while preserving order.

Verified — duplicate “status” items (e.g. “1 story with warnings”) are now removed.
Implementation follows @dosubot’s earlier analysis.
Builds successfully and maintains the original structure and behavior.

@storybookjs/core kindly requesting review whenever you get a chance and consider merging

Thanks for maintaining this amazing project!