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mckero
c164917632
Three sources into one buffer: power events from the supervisor, QEMU's stderr (which run.sh and the tests used to discard), and firmware serial, which the machine model tags SERIAL. default_launcher now captures stderr rather than sending it to DEVNULL, which is what made the last two reachable. The pane is a fixed-height scroll box as asked: 180px with overflow-y:auto, so it never grows with content -- older lines move up out of view and you scroll back to read them. Two details that make that usable rather than annoying: - Autoscroll only sticks when you are already at the bottom. Otherwise a new line arriving would yank the view away from whatever you had scrolled up to read. - MAX_LOG_LINES caps the <pre> as well. The box is fixed-height either way, but an unbounded DOM node would still grow memory across a long session. Verified on the live server: power on produced power/qemu/serial lines including "UV-K5 Firmware, EGZUMER-F4HWN+NR7Y c91cec95", each Reset logs the event and the banner reappearing, and since= never resent a line. A capacity-500 buffer fed 2000 lines keeps exactly 500 and does not replay evicted entries to a stale cursor.