Feature Request: show reminder before sending an image without description

[errhammr]

When I send an image on Mastodon using Twidere, I'm regularly disappointed with myself because I once again forgot to add an image description for people using screen readers.

I'd like to be alerted by Twidere about forgotten image descriptions when I press the send button, giving me the option to add one or send anyway without one. It would be totally okay for me to have this feature disabled by default with the option to enable it in the app settings.

This feature would not only help me to add image descriptions, it would also help every person who consumes Mastodon posts using a screen reader. It would be a nice quality of life improvement.

Some email clients show a message box alerting you before sending if you have forgotten to provide a subject line. That's where I got inspiration for this feature request.