M9.2: preset files — .lcpreset import/export (groups preserved), XMP presets via crs: mapping
- engine presets.rs: .lcpreset JSON format {format: "lightcraft.preset", version, presets[]},
parse_preset_file (.lcpreset file / bare preset / array, or XMP), folder expansion,
Session::add_presets (identical presets skipped, id clashes get fresh user.* ids, built-ins
never replaced).
- crs::preset_from_xmp: crs: fields → partial settings, crs:Name/crs:Group (fallback: file name /
"Imported Presets").
- Commands preset.import {paths} and preset.export {path, ids?, group?}; UI commands
file.importPresets / file.exportPresets (File menu, with native open/save dialogs on desktop),
Presets panel "⋯" menu (Import Presets…, Export User Presets…) and group context menu
(Export Group…).
- Tests: export → import round trip keeps groups/settings, duplicates skipped, clashing ids,
malformed files reported, hand-written XMP preset imports and applies.
- docs/xmp-interop.md: preset file section.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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