0.00008 GiB rounded to 0.0 — looked like no progress. Now shows '16 MB' → '128 MB' → '0.5 GiB' → '1.9 GiB' as upload progresses.
When files are stored in /mnt/converter/in/{guid}/, the backend needs the full relative path. The analyze endpoint now constructs '{guid}/{filename}' before passing to the backend API.