[Authenticator][A11Y] Form errors not announced to screen readers on web (WCAG 4.1.3)

[timstarkk]

Description

The Amplify Authenticator's SignInForm and SignUpForm do not announce errors to screen readers on web. Error messages appear visually but are not announced.

This violates WCAG 4.1.3 (Status Messages - Level AA): Status messages must be programmatically determinable without receiving focus.

Affected error types:

1. Validation errors (client-side)

   • "Enter your Username"
   • "Enter your Password"
   • "Email is not valid"

2. API errors (server-side)

   • "Incorrect username or password"
   • "User does not exist"
   • "Password attempts exceeded"

Categories

• Authenticator

Steps to Reproduce

1. Use amplify_authenticator with SignInForm()
2. Enable VoiceOver or a browser screen reader
3. Submit with empty fields → validation errors not announced
4. Submit with wrong credentials → API error not announced

Screenshots

No response

Platforms

• iOS
• Android
• Web
• macOS
• Windows
• Linux

Flutter Version

3.35.1

Amplify Flutter Version

2.3.7

Deployment Method

Amplify CLI (Gen 1)

Schema

N/A

[mattcreaser]

Thanks for opening this issue @timstarkk. We're looking to get this addressed together with #6568.