A11y Bug: 10987393: [high contrast]: After applying High Contrast theme, selected state focus is not visible.

[KethanaReddy7]

Environment Details:
Application Name: OneNote Clipper-web
Platform: Web
OS Version: 25H2(26200.7392)
Edge Version: 143.0.3650.96 (Official build) (64-bit)
Application URL: https://www.onenote.com/clipper
Repro Steps:
Open https://www.onenote.com/clipper.
Navigate till get one note web clipper for edge and activate it.
Edge Add-ons page will appear. Invoke the Get button.
OneNote Clipper will be added in edge extension section.
Expand the Extension button and turn on the OneNote Clipper Show in Toolbar button.
Now invoke the OneNote clipper button.
Open in sign in page,
Navigate to "Article" button, invoke it.
Navigate to "sans serif" tab item.
Observe the issue.
Actual Result:
After applying High Contrast theme, selected state focus is not visible.
Expected Result:
In High Contrast theme, the selected state/focus indicator must be clearly visible with sufficient contrast and a distinct visual style (e.g., outline, border, highlight) so users can easily identify the focused or selected element.
User Impact:
Users with low vision, color vision deficiencies, or those relying on High Contrast mode cannot determine the current focus or selected item.
MAS Reference:
MAS 4.3.1 – No Disruption of Accessibility Features

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