Avatar (and Avatar Group) fallback text should apply when image doesn't load

The Avatar component and the Avatar Group component both allow setting a fallback text. When no image URL is provided, it displays the initials of the fallback text instead. However, if an image URL is provided but does not properly resolve to an image, the fallback text is ignored. This case should be fixed to have the same behavior as when no image URL is provided. The Avatar column format in a table already correctly handles this case.

Additional info:
Retool Cloud

Fallback text should definitely appear when the image fails to load, not just when it’s missing entirely. Consistent behavior across components like Avatar and Avatar Group would make things much more reliable.