From any directory you want to share, run:
`uvx qrdrop`
It starts a temporary HTTP server on your local network and gives you a URL, a generated three-word password, and a QR code. Scan the code on your phone and you can be browsing, uploading, downloading, renaming, and deleting files through the web UI in seconds.
(note: full upload/download/modify was what I originally needed and remains the default, but I added --upload and --readonly modes if you'd like a more restrictive experience)