Provide alert or stop if character limit is over on a platform.

When making a post, the "per-channel text" option is very hidden and hard to see and look at. I noticed that sometimes the text character limit is over on a specific platform, like Bluesky, but the checkmark on the platforms for the post show it's OK.

Can you make it so the check is an alert like this if the character limit for a platform has been exceeded?