The seven effort levels were enumerated four times in four shapes: a
labels map, a radio-option list, a settings value array, and an enum
list for the config field. Each carried its own hardcoded medium
fallback, which is how the picker drifted from the configured default in
the first place.
Collapse them into lib/reasoning-effort, which owns the scale, the
labels, and the resolve/fallback rules. Net -80/+26 in source. Dropping
the effortLabelKey cast also means the i18n keys are now type-checked
against the canonical list instead of asserted into place.
Brooklyn Nicholson
43d1088ba2