HYPRLAND_INSTANCE_SIGNATURE is unset under viewtop, so this compared "" to
"" and isNewHyprlandInstance was false on every start. It gates
lock.launchOnStartup, which has therefore never fired once under viewtop,
and both Idle.qml copies read it as well.
viewtop publishes viewtop.instance beside its control socket — pid plus
startup nanos, different every start. Read that first, fall back to the env
var so a Hyprland session (the laptop is still one) keeps working, and
treat "neither" as the session continuing, which re-locks rather than
assuming a fresh boot.
95dd21b998