This sounds like an interesting idea. For Android users there is KDE Connect that perhaps can help to transfer files from smartphone to desktop, and for users in Apple Ecosystem there is airdrop / shared clipboard, but there is hardly any solution for iPhone/iPad users with Windows desktop. Just some quick questions:
- Is the QR code / link one time only? For example, after I uploaded an image, can I reuse the link (or keep the web page open in my mobile browser) to upload more files?
- Will there be settings to customize IP and port listening, as some users may struggle in some complex network environments?
- Is it possible to create some kind of PWA for mobile browser so the user don't have to repair to the same desktop Joplin instance? (Or just let the user set the QR code / link expiration manually?)
Still, great idea! Looking forward to it.