The generic plugin-config editor couldn't edit IList<DayOfWeek> and showed durations
in milliseconds + the runtime Persisted* state. Add [JsonIgnore] proxy properties that
the AutoFields editor CAN render: OpenDays ([Flags] enum -> checkboxes), Registration/
Preparation/Siege minutes + CrownHold seconds (int inputs). Hide the underlying TimeSpan/
list/Persisted* fields with [Browsable(false)]. Runtime JSON shape is unchanged (proxies
are JsonIgnore) so no persisted-config break.
3e465c016e