[5.x]: Matrix in card view doesn't show validation errors from card

[WHITE-developer]

What happened?

Description

When saving an entry with a matrix in card view and one of the cards has a validation error, there is no indication which card has the error

Steps to reproduce

1. Matrix in Card view
2. Have it saved correctly
3. Make a field required in the matrix
4. Try resaving the entry

Expected behavior

Some indication where the error is

Actual behavior

No indication except on which tab the error is

Craft CMS version

5.1.9 & 5.2.0-beta.3

PHP version

8.3.7

Operating system and version

No response

Database type and version

MySQL 8.0.37

Image driver and version

No response

Installed plugins and versions

[brandonkelly]

Thanks for pointing that out! This is now resolved for Craft 5.2, which will start displaying entry cards in an error state when they contain validation errors:

[WHITE-developer]

This seems not to work when in a x levels deep slideout, just getting a "Couldn’t save entry." message there, but I guess it's in progress for 5.3?

[brandonkelly]

@WHITE-developer Can you post a new issue with full steps to reproduce + expected/actual results?