fix: improve APY dashboard accessibility

[aoshl1]

Description

Improves APY dashboard accessibility.

Fixes #542

Type of Change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

Verification Commands

• npm test -- ApyDashboard (Frontend)
• ./node_modules/.bin/eslint src/components/dashboard/ApyDashboard.tsx src/components/dashboard/__tests__/ApyDashboard.test.tsx (Frontend)

Contract Security (if contracts/ changed)

• Storage schema changes documented or migration provided
• All entry points have authorization checks
• Arithmetic uses checked operations
• New entry points have unit tests including unauthorized callers
• No new admin roles without governance proposal

Screenshots (if applicable)

N/A

UI Snapshot Checklist

• Screenshots provided for Desktop (1024px+)
• Screenshots provided for Mobile (375px)
• No visual changes

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