[UI/UX Design] Add a mobile bottom navigation pattern with safe-area awareness

[thlpkee20-wq]

Description

Below 640px, the header-only navigation forces an extra tap to reach common surfaces. Add a BottomNav for the top-level destinations with safe-area inset support on iOS.

Requirements and context

• Must be accessible (WCAG 2.1 AA), responsive, and documented in the design system
• Should be consistent with existing patterns and easy to review
• Relevant code: src/app/components/dashboard-shell.tsx
• Active tab must be conveyed via aria-current="page" and a visible indicator

Suggested execution

• Fork the repo and create a branch
• git checkout -b uiux/mobile-bottom-nav
• Implement changes
  • Add BottomNav shown only below 640px
  • Use env(safe-area-inset-bottom) padding
  • Ensure FAB and toasts do not overlap the bar
• Validate accessibility and responsive assumptions

Test and commit

• Run checks
  • npm run lint and component/visual tests
• Cover edge cases
  • Responsive breakpoints, empty/loading/error states, keyboard/screen-reader, contrast, dark mode
• Include screenshots/before-after and accessibility (axe) notes

Example commit message

design: add mobile bottom navigation pattern

Guidelines

• Minimum 95 percent test coverage
• Clear documentation
• Timeframe: 96 hours

[Chi-nenye1975]

@Chi-nenye1975 has applied to work on this issue as part of the Stellar Wave Program's 6th wave.

Hello Maintainer, i'd love to work on this issue

ℹ️ Repo Maintainers: To accept this application, review their application or assign @Chi-nenye1975 to this issue.

[drips-wave]

Congratulations, @Chi-nenye1975! 🎉 Your application was accepted by the repo's maintainers, and the issue is due on June 30, 2026.

🧑‍💻 @Chi-nenye1975: Please resolve the issue such that the repo's maintainers have enough time to review your contribution before the due date. You'll earn Points for completing the issue on-time, which will make you eligible for a share of the Stellar Wave Program's reward pool.

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