Canvas: Minor bug fixes

✨ Minor updates

You can now copy links to individual comment threads

🐛 Notable bugfixes

Fixes an issue where typing in a comment field on Android would sometimes produce double-insertion of the characters typed.

Fixed a bug where starting instructions with keyboard shortcut (mod+enter) resulted in no output.

Fixes an issue where running ghostwriting / autocomplete would not work on an empty line

Improves stability when working on Studio-linked documents without update access