RefuelBand leaves RoadtripSidebar.tsx for its own module and is
imported back by name; the imports only it used go with it. The code
moves as it was, with the dashes in its comments rewritten as colons
and parentheses. DriveBand's note, which the band used to separate from
its function, now sits directly above DriveBand. Nothing renders
differently.
New tests render the band on its own: idle, searching, offers with and
without the right to add one, each empty answer, and the battery words
for an electric car, which no existing test reached.
Maurice
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