The "colour the stations not worked on this band and mode" option did nothing.
The backend computed WorkedSlot correctly and the generated bindings declared
it, but the status map in App.tsx is assembled field by field from the reply,
and worked_slot was not on that list. The extra key was simply dropped, so the
frontend saw undefined, the === false test never matched, and every spot stayed
muted. Silent by construction: nothing warns that a copied-out struct is missing
a field. All three assembly sites now carry it, and the state type names it so
the compiler catches the next one.
The band map also memoised the transformed status map on spotStatusRaw alone,
so toggling an option changed nothing until a poll happened to hand over a fresh
object. The options are read at render time and are part of the dependencies.