Have you nostr.build yet?
Discussion
Na working on my own solution. Might try and extend it to my relay somehow.
It would be hella niche but it would be sick if a client let you set your own upload provider. Im on amethyst right now. It has an upload image button but its imgur. I was trying to use my at nextcloud first but it didn't do .gifs well.
Just don't wanna use a third party if I can help it.
Nextcloud at first*
Jfc wen edit button
https://coracle.social/ allows you to use your own provider I think.
Ill have to test it out