LR-IMP-DEVICE: import from camera / memory card

library.devices lists mounted volumes with a DCIM folder (macOS /Volumes, Linux /media and
/run/media, Windows drive letters; LIGHTCRAFT_DEVICE_ROOTS overrides; cached for 2 s).
File → Add from Device opens the import review of a card's DCIM folder, set to copy into the
library.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

crates/engine/src/cmd/library.rs

@@ -240,6 +240,9 @@ pub fn specs() -> Vec<CommandSpec> {
             s.selection = Selection { active: s.selection.active.filter(|a| vis.contains(a)).or(vis.first().copied()), ids: vis };
             Ok(json!({"selected": s.selection.ids.len()}))
         }),
+        cmd!(query "library.devices", "Cameras and Cards", [], None, "{} → [{name, path (its DCIM folder), root}] — mounted volumes with a DCIM folder", always, |_, _| {
+            Ok(serde_json::to_value(crate::devices::devices()).unwrap_or_default())
+        }),
         cmd!(
             "library.selectBy",
             "Select by Flag, Rating or Label",