Hi @baris
Thanks for adding upload feature in next Release.
Regarding the other issues: I have the same problem with uploading on mobile here too. If I try to upload an Image to a post on mobile the post content remains empty. It's definitley related to my device.
The Drag & Drop upload function is working here and on Persona. On Slick only the image path is pasted into the chat message. Post upload with drag and drop is working.