[File manager] No 'aria selected' in file manager tabs

[bohdan-ulianych]

EPAM AI DIAL UI Kit version

1.0.0

Actual result

No 'aria selected' in file manager tabs

Expected result

In spec:
https://github.com/epam/ai-dial-chat/blob/development-1.0/openspec/specs/file-manager-tabs/spec.md

Requirement: Tab button accessibility
Each rendered tab button SHALL carry role="tab" and aria-selected (per ARIA spec). aria-selected SHALL be true for the currently active tab and false for all others. This requirement mirrors the pattern established in the file-manager-toolbar spec (#7932).

Confidential information

• I confirm that do not share any confidential information

[bohdan-ulianych]

verified in dev