As a screen reader user I want loading and error states to be announced automatically so I know when the app is busy or an error occurs

[ChristopherRotnes]

Summary

<InlineLoading> and <InlineNotification> components appear and disappear dynamically in MuscleMap.jsx, History.jsx, Report.jsx, and other pages, but they are not wrapped in aria-live regions. Screen reader users must manually navigate to discover that the app is loading or that an error has occurred. Errors in particular require immediate announcement — a user who submits a form and receives an error should hear it without having to hunt for it.

Priority

High

Acceptance criteria

• All dynamic error <InlineNotification> instances are wrapped in (or themselves are inside) a role=\"alert\" / aria-live=\"assertive\" region, so errors are announced immediately
• All <InlineLoading> instances are wrapped in an aria-live=\"polite\" region with aria-busy=\"true\" while loading and aria-busy=\"false\" when complete
• Verify Carbon's InlineNotification already sets role=\"alert\" internally; if it does, document this; if it does not, add the wrapper
• Tested with a screen reader: errors are read aloud without manual navigation; loading completion is announced politely

[ChristopherRotnes]

Fixed in PR #89 (a11y/live-regions): added aria-live="polite" + aria-busy to loading/error states in Report, History, and Home. Verified by developer.