Use case

Currently, when using TextField / TextFormField, the error text (errorText) is rendered with an indent that matches the input/hint text padding. This behavior makes the error text look visually offset from the left border of the field.

At the moment, the only way to fix this is by overriding decoration properties (error widget, custom padding, etc.) on each individual field. This is tedious and redundant in larger apps. If the padding needs to be adjusted later, developers must revisit every field manually.

Proposal

Introduce a theme-level property (e.g., in InputDecorationTheme) that controls the horizontal alignment/padding of error/helper text independently from the input/hint text.

Example API idea:

InputDecorationTheme(
  errorPadding: EdgeInsets.zero, // or Alignment options
  errorAlignment: TextAlign.start,
)

Why it matters:

Developers often want the input/hint text to be padded, but the error text to be flush with the text field border.

This improves visual consistency in UIs.

Reduces redundancy by eliminating per-field overrides.