⚡️Comments feature improvements

[AntoLC]

Bug Report

• When we add a comments we have to scroll to the bottom of the thread to see it, add a automatic scroll down #1687
• When we add a comments, add automatically the focus in the input #1687
• Accesibility color issue on overline text to comment: #1687

• The comment button is displayed in the toolbar in mobile even though it's not possible to comment on mobile #1687
• Deleting a comment doesn't remove background highlight #1687

Capture.video.du.02-12-2025.18.17.04.webm

• When we write a comment, "enter" add a break line, add "ctrl+enter" to trigger the comment submit
  (Doing "Tab then enter" works fine, if it is not enough we have to open a issue BN side)
• We have to do a double click to open the emoji picker (under the text comment)
• During collaboration, if someone write/type when we try to do a initial comment (first modal) , the modal close, only if the typing is previous of the message
  (Next BN release has maybe a patch about it)
• Color of the submit button doesn't seem right it's not coherent with the rest of the UI 🐛(frontend) paste content with comments from another document #1732

• when you copy paste a comment from a doc to another Docs, if you click on the copied text you get an application error 🐛(frontend) paste content with comments from another document #1732
  This PR fixes partially the problem as well, no crash anymore: ⬆️(dependencies) bump blocknote to 0.44.2 #1733

Capture.video.du.2025-12-12.10-57-52.webm

[bzg]

+1 on "add "ctrl+enter" to trigger the comment submit", it's more expected than "TAB then RET".