Both Set Energy rows allowed 1-30 keV, an arbitrary spinbox default;
nothing downstream validates the request (daq.change_energy forwards
straight to bec). Shared ENERGY_MIN/MAX_KEV constants now bound both
spins to 4-20 keV with a tooltip flagging the range as pending
Beamline Scientist confirmation.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>