Reviewed the upload path. Single-file and folder uploads already drove the
progress bar, but folder progress was file-COUNT based ((i + filePct)/total),
which jumps around when a folder mixes tiny files with large ones and gives
no sense of total size.
- Folder upload: progress is now byte-weighted (sum of all file sizes), so
the bar tracks real transfer. Added a detail line "<i> / <n> files ·
<sent> / <total>" and the bar shows the current file name.
- Single file: added the same byte detail ("<sent> / <size>").
- Progress component gained an optional detail sub-line (shared by the
download bar too).
Frontend-only; all 3 images rebuilt+pushed 0.37.3 for tag consistency.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
