feat: preserve body history and placed modelling workflows

Record ownership transfers in the timeline so earlier Join/Cut membership,
world placement, machining data and styles survive component moves, edits,
independent copying, undo and reopening. Preserve pending positions in history
snapshots and keep constructor transfers ordered during feature redefinition.

Retain shallow sheet pockets and exact planar intersection islands through
unfold/refold, with depth-aware flat previews and DXF export. Store explicit
3D wire coordinate spaces and migrate known legacy provenance without moving
saved points or analytic fits.

Infer unique eligible cylindrical Emboss targets, align Revolve manipulators
with actual extent geometry, and discard obsolete preview errors after input
correction. Certify constructed and immutable imported face styles using exact
source metadata while preserving legacy face names. Upgrade designs to format10
with bounded validation and geometry-preserving legacy migration.

crates/engine/src/cmd/sketch_project.rs

@@ -123,27 +123,49 @@ fn sketch_plane(doc: &Document, id: u64) -> Result<Plane> {
     }
 }
 
+/// Keep candidate feature edits while overlaying uncommitted occurrence placements.
+fn placed_candidate<'a>(s: &Session, doc: &'a Document) -> std::borrow::Cow<'a, Document> {
+    if s.pending_moves.is_empty() {
+        return std::borrow::Cow::Borrowed(doc);
+    }
+    let mut placed = doc.clone();
+    for o in &mut placed.occurrences {
+        if let Some(m) = s.pending_moves.get(&o.id) {
+            o.transform = *m;
+        }
+    }
+    std::borrow::Cow::Owned(placed)
+}
+
+fn owner_frame(s: &Session, doc: &Document, comp: u64) -> solvecraft_doc::Mat {
+    if comp == s.active_component { s.active_component_frame() } else { doc.component_transform(comp) }
+}
+
 /// Re-resolve the links of a sketch being edited against the model before it, so edits see
 /// current reference geometry. Returns warnings.
 pub(super) fn refresh(s: &Session, doc: &Document, id: u64, sk: &mut Sketch) -> Vec<String> {
     if sk.links.is_empty() {
         return Vec::new();
     }
-    let Ok(plane) = sketch_plane(doc, id) else { return Vec::new() };
+    let doc = placed_candidate(s, doc);
+    let Ok(plane) = sketch_plane(&doc, id) else { return Vec::new() };
     let (vals, _) = doc.param_values();
     let st = s.model.state_before(id);
-    solvecraft_doc::project::refresh_links(doc, &vals, &st, &plane, sk)
+    let comp = doc.feature(id).map(|f| f.component).unwrap_or(0);
+    let st = solvecraft_doc::state_in_frame_at(&doc, &st, comp, owner_frame(s, &doc, comp));
+    solvecraft_doc::project::refresh_links(&doc, &vals, &st, &plane, sk)
 }
 
 /// Add a link for `src` to sketch `id` in `doc` (not stored in the session). Returns the link id.
 pub(super) fn add_link(s: &Session, doc: &Document, id: u64, sk: &mut Sketch, kind: LinkKind, src: LinkSource) -> Result<String> {
-    let plane = sketch_plane(doc, id)?;
+    let doc = placed_candidate(s, doc);
+    let plane = sketch_plane(&doc, id)?;
     let (vals, _) = doc.param_values();
     let st = s.model.state_before(id);
     // The model as the sketch's component sees it.
     let comp = doc.feature(id).map(|f| f.component).unwrap_or(0);
-    let st = solvecraft_doc::state_in_frame(doc, &st, comp);
-    let r = resolve(doc, &vals, &st, &plane, kind, &src)?;
+    let st = solvecraft_doc::state_in_frame_at(&doc, &st, comp, owner_frame(s, &doc, comp));
+    let r = resolve(&doc, &vals, &st, &plane, kind, &src)?;
     let name = if let LinkSource::Face { at, .. } = &r.source {
         solvecraft_doc::naming::face_names_at(&st, &[*at]).into_iter().next().filter(|n| !n.is_empty())
     } else {