Add aria-labels to interactive UI elements for accessibility

[animaworks-dev-team]

Summary

Improve accessibility by adding aria-label and aria-describedby attributes to interactive elements in the web UI.

What to do

Audit server/static/ for buttons, inputs, and controls that lack accessibility attributes. Priority areas:

• Theme selector cards
• Chat input and send button
• Voice chat controls (mic, stop)
• Settings page toggles and sliders
• Navigation links and sidebar items
• Modal close buttons

How to verify

• Use browser DevTools Accessibility panel to check for missing labels
• Run Lighthouse accessibility audit
• Test with a screen reader if possible

Notes

• Use descriptive labels (e.g. aria-label="Send message" not aria-label="Button")
• Localized strings can use the i18n system if applicable, but English-only is fine as a first pass

[initcatcher]

Happy to pick this up. I'll audit server/static/ and submit a PR with before/after Lighthouse scores.