change design of responsive annotateInput
I think the light grey icons inside the input field were perfect:
If this design can be combined with responsiveness it would be perfect. If the input field gets too narrow to display the icons + the text "annotate" or "comment", then I would rather say that the icons or the "annotate"/"comment" text are not shown anymore.
I also think that the delete/send buttons are only necessary for images or videos but not for text input.
I know, that we need a "send"/"submit" button for the text input on mobile devices. As suggested before, my preferred version therefore is similar to this one:
The paper-plane icon could even be a little bit smaller. Really like the small grey icons (voicerecording, attachment, drawing) in the input field. I don't think that you need a delete button or icon for text input. You can delete text using backspace (on desktop and mobile).