Kiosks were updating, closing Edge, and never coming back - the display stayed
dead until the next logon or reboot.
The kiosk is launched by an all-users Startup shortcut, which runs ONCE at
logon, and nothing supervised the browser afterwards. RelaunchNotification=2
was meant to cover the update case and does not: that policy drives Edge's own
update-restart, which depends on session restore to return to where it was.
Kiosk mode restores no session and has no UI to show the notification in, so
Edge honours the close and never the relaunch. The same gap swallowed crashes
and anyone closing the window.
Adds a scope entry that registers a scheduled task in the INTERACTIVE session -
SYSTEM cannot launch a visible browser, which is why the dispatcher writes a
shortcut rather than calling Start-Process. The task relaunches from that same
shortcut, so the target URL keeps one source of truth: retarget a subtype in
DISPLAY_TYPE_TARGETS and the watchdog follows unchanged.
Two details that matter. It matches on the COMMAND LINE, not the image name:
Edge runs a crowd of msedge.exe children and only the parent carries --kiosk,
so testing "is msedge running" would let a stray renderer mask a dead kiosk
forever - verified against a real kiosk PC showing 7 processes and 1 match. And
it avoids -RepetitionDuration [TimeSpan]::MaxValue, which serialises out of
range and is rejected, exactly as the kiosk installer documents.
A launch debounce stops a display that fails to start from spawning a browser
every cycle, the log is size-bounded because this runs forever on a PC nobody
watches, and it does nothing at all when no kiosk shortcut is present so it
cannot put Edge on a PC that never asked for one.
Verified on Windows: registers with the right principal and triggers, relaunches
when the kiosk is gone, debounces an immediate re-run, and is idempotent across
cycles (the staged script compare is trimmed - Set-Content adds a trailing
newline the here-string lacks, so an untrimmed compare rewrote it every cycle).
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