accessibility: add aria-labels to frontend icon buttons

[notlexius-glitch]

Description

Related Issue

Fixes #

Type of change

• Bug fix
• New feature / enhancement
• Documentation update
• Test addition
• Refactor

Checklist

• I have read CONTRIBUTING.md
• My branch is up to date with main
• I have run pytest -v and all tests pass
• I have not introduced duplicate issues or features
• My PR title follows the format: feat/fix/docs/test: short description
• I have added tests for new features (Level 2 and 3 issues)
• No hardcoded secrets or API keys in my code
• This PR is linked to a GSSoC 2026 issue

Screenshots (if frontend change)

Test evidence

pytest -v
# paste output

[notlexius-glitch]

"Hi @imDarshanGK, I have successfully resolved the merge conflicts in index.html. The PR is ready for your review and workflow approval whenever you have some time. Thank you!"

Once they approve the workflows and submit their review, your pull request will be ready to merge!

[imDarshanGK]

@notlexius-glitch update your branch with the latest main and issue number?

[notlexius-glitch]

HI @imDarshanGK
Added aria-label attributes to the frontend icon buttons to improve accessibility for screen readers.

Closes #313

[notlexius-glitch]

@imDarshanGK I have resolved the merge conflicts and updated the branch. Could you please approve the workflows and review the changes? Thank you!!

[notlexius-glitch]

Hi @imDarshanGK, could you please take a look at this PR and provide a code owner review when you have a moment? Also, if a maintainer could approve the pending CI workflows so the lint checks can run, that would be greatly appreciated! Thank you.

[imDarshanGK]

@notlexius-glitch update the branch with the latest main changes and resolve conflicts

[imDarshanGK]

@notlexius-glitch issue number?

[notlexius-glitch]

@imDarshanGK issu number #313