Slicing from Bambuddy meant taking a process preset as-is; any change
meant a round trip through Bambu Studio. The slice dialog now carries
OrcaSlicer's full process tree -- pages, groups, labels, tooltips,
ranges and defaults extracted from the slicer's own sources.
Enable/disable rules are evaluated from the slicer's own enable_if
expressions via a recursive-descent interpreter (no eval, CSP), with
enum comparisons validated against each option's declared values.
Anything undecidable leaves the field editable rather than greyed.
Overrides apply after the source's support config (#1881) and the
designer's carried tweaks (#2622), so an explicit choice always wins;
an untouched panel sends the same request as before.
Adds slice_engine as a separate setting from preferred_slicer -- where
slicing runs is a different axis from which binary the sidecar drives.
Only the sidecar engine is registered, so no picker renders yet.
maziggy