QGIS stable is 4.2.3 on the current KDE runtime; the stale 3.28.9 lts install stays flagged for removal. PROJ 9.9.0 from that flatpak turns the recorded origin into E 376515.389 / N 3774224.083 (NAD83 UTM 11N), with six control points whose projected spans reproduce the OSM footprint measurements. Engine decision recorded: 5.8.4 is downloading, 5.2.0 stays only as a fallback.