Cleanup deleted completed staging files as soon as 5 minutes had
passed instead of the intended 2 hours, so successfully downloaded
files could be silently removed before being moved out of staging.
Credentials optional: empty WEBSHARE_* uses file_link without wst (free CDN). Verified against live API; docs and tests updated. Includes cancel→dequeue fix for queued downloads.
- ui/index.html, ui/styles.css, ui/scripts.js — minimal two-tab UI
- Search tab: big search bar, results with size/votes, add-to-queue button
- Queue tab: progress bar, speed, downloaded/total, status badges, cancel
- Switches to queue tab on load if downloads are active
- Backend: GET /api/search, POST /api/queue/add, GET /api/queue, POST /api/queue/cancel
- Speed tracking in streamToFile, abort tracking for immediate cancel
- No rounded corners, dark theme
