Accessibility improvements

[Zwiterrion]

This work focuses on making Adno inclusive across devices, abilities, and contexts.

• Strengthening mobile and tablet usability
• Enhancing keyboard navigation, focus order, and interaction ergonomics
• Improving ARIA semantics, contrast ratios, and touch targets
• Ensuring multi-document navigation remains accessible to users with cognitive or visual impairments

These improvements support a more equitable digital ecosystem and reinforce Adno's role as a public-interest tool.