Chat avatars lack appropriate role attributes

[Woebin]

Describe the bug
This is a violation of the Web Content Accessibility Guidelines (WCAG) SC 4.1.2 (A) Name, Role, Value.

For SVG images to work as expected, they need to have an appropriate role attribute value - either application, document, or image. The user avatars in the chat have no role` attribute at all.

The avatars do have aria-label attributes, which may not be properly parsed by assistive technologies without an associated role.

Expected behavior
The avatars should have role="image" to go along with the aria-label.

Server:

• Peertube version: 7.2.1
• peertube-plugin-livechat version: 14.0.0

Desktop:

• OS: MacOS 15.5
• Browser: Google Chrome Version 137.0.7151.120 (Official Build) (arm64)

Additional context
This issue was recorded as part of an accessibility audit carried out by Axess Lab, contracted by HowlRound Theatre Commons.