Nope ..
On web I have tried Yakihonne and Habla ..both are promising but the point is you don't write long content on a web client .. everyone has their own editor .. and little cave to write in ..
I ended up doing cut/ paste .. from vim to Yakihonne but it is what it is .. bad !
Btw ..I am not asking for a dedicated native client ..cuz then you will end up doing one for windows , another for mac and thousands of Linux distros ..
All we need is plugins to push content from popular editors to nostr ..
Eg Vimnostr plugin .. notionNostr .. logseqNostr .. I guess some people still write in Word :-) ..