cfdd8d2744
- EditDrawer: stop auto-inserting  into description on
upload — images are tracked via custom.images; the refs only cluttered
the textarea. Strip any pre-existing refs on load so old sidecars are
also cleaned up when the drawer is opened.
- ActivityDetail: imageBase now treats detail_url that starts with '/'
as already-absolute (same fix pattern as track_url / detail_url);
was prepending ${base}data/ on top of /data/... → double path.