fix(*): validate errors on form changes

[MichaelVerdon]

closes #1310

• This change will display errors and remove them based on keyboard strokes using onChanged instead onBlur to make the UI more responsive. So if you are a few characters short on a password, the error will vanish as soon as you meet the requirements, same with email.
• This change is applied to all packages
• Removed onBlur references as it is not required if fields are already validated by onChange()
• Errors say 8 characters on password is enforced but internally we use 6 so change message to 6.
• Added tests to verify before and after a valid input

React

Screen.Recording.2026-02-10.at.15.06.28.mov

Angular

Screen.Recording.2026-02-12.at.10.41.34.mov

Shadcn

Screen.Recording.2026-02-12.at.10.49.49.mov

[russellwheatley]

I've made a couple of updates.

• React - only show errors after a submit attempt or touch by user.
• Angular - after updating field value, clear any form level. To match React.

[russellwheatley]

Could you add some unit tests for the changes.

• assert the form state’s errorMap.onSubmit is cleared after typing.
• creates a form with invalid values, verifies no field validation messages render before submit, triggers handleSubmit(), verifies validation messages appear, then change the input and verify the message clears.