* agents: `magpie omp auto` sets omp's thinking to auto, and the panel's effort slider shows a level it doesn't list as it is
omp keeps defaultThinkingLevel at minimal … max or auto (omp picks a
level each turn), but magpie offered only the six levels. So
`magpie omp auto` found no field offering auto and took it for a model:
modelRoles.default became the literal "auto". auto is now offered
first, as omp's own picker has it, and kept out of ompEfforts, which a
model's thinking levels in models.yml are filtered by.
The tray panel's effort slider drew a value that isn't one of its
options (an agent with no effort set, a level magpie doesn't list) at
the first stop, named as the lowest level, and a touch there wrote that
level over it. It now gets a stop of its own, as the window's picker
gives the current value, so it reads as it is and a touch leaves it.
* agents: the note on omp's thinking picker holds for omp 16.3.5 too
omp 16.3.5 takes auto for defaultThinkingLevel as 18.4.4 does (config/settings-schema.ts there), as checked on #339.
