Screenshare codec always uses software, not hardware

Can reproduce Stable Desktop 2026.1018.223338, Web 2026.1018.223338, Linux 7.2.11-arch1-1 (x64), Electron 44.4.1, Chrome 152.0.7977.78, Node 24.21.0, Locale en-GB AMD 7900XTX All video codecs report the "software encoding in use" banner. Screen share when connected to the channel in my web browser works fine. Windows and Linux clients viewing the stream get the same banner about software decoding.