Ensure Git Proxy user interfaces meet WCAG 2.2 Level AA accessibility requirements

**Is your feature request related to a problem? Please describe.**

UK and EU private sector firms are encouraged to meet WCAG 2.2 Level AA for accessibility compliance. This standard ensures a comprehensive level of accessibility for a wider range of users with disabilities. To my knowledge, Git Proxy has not been reviewed for accessibility yet and may not meet the desired level of accessibility.

**Describe the solution you'd like**

- Conduct a review of Git Proxy’s accessibility using the identified support/tooling.
- Build an issue list for remediation based on the review findings.
- Implement the relevant accessibility features.

**Additional context**

We intend to contribute to this work in March 2026.

Review Git Proxy’s user interfaces against WCAG 2.2 Level AA using appropriate accessibility support or tooling. The issue does not identify specific files, entry points, or tooling, so first map the interfaces and record the findings. Done means an issue list exists and the relevant accessibility remediations have been implemented.

Written by the indexing model from the issue text.