The _ipc_move_component and _ipc_place_component handlers were ignoring
the unit field from position parameters, always treating values as mm.
When inches were specified, components would be placed at 1/25.4th of
the intended position. Now reads the unit field and converts to mm
before passing to the IPC backend.
Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
