Bonsai: draw moved and multi-linked models at their displayed locations

create_drawing opened linked IFCs raw, so a moved link serialized at
its original coordinates and its elements fell outside the drawing.
The stored link transformation is the model-space delta, so it is now
baked into the linework iterator via the model-offset/model-rotation
settings (Trans @ Rot composition matches the rigid matrix
decomposition; the plan-view Z offset adds onto the translation).

The serialization loop also collapsed same-file links into a dict
keyed by filepath, dropping all but the last link. It now iterates one
entry per link and intersects each link's drawing elements with its
selector query, so drawings show what each link displays in the
viewport. Adds tool.Project.get_link_transformation_matrix as the
shared accessor for the stored 4x4.

Verified headless: window link moved +5m appears offset by exactly
5m x scale; unmoved door link at its native position; both present.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

docs/dev-notes/linked-file-features.md

@@ -165,6 +165,31 @@ stay compatible.
   root empty first (filepath alone is ambiguous with several links per file). The
   element's IFC placement syncs to the moved location on save — intended.
 
+### Drawings (`create_drawing`) — moved links and per-link queries
+
+- The linework serializer opened linked IFCs raw, so a moved link's elements were
+  drawn at their *original* coordinates (usually outside the drawing extents —
+  "linked objects disappear from prints after moving the link").
+- The stored link transformation is already the **model-space** delta (that is how
+  `save_link_transformation` derives it), which is exactly the space the serializer
+  works in — so it can be baked straight into the geometry iterator via the existing
+  `model-offset`/`model-rotation` settings. The mapping composes
+  `Trans(model-offset) @ Rot(model-rotation)` (see `mapping.cpp`), matching the
+  `Trans(t) @ Rot(R)` decomposition of the rigid link matrix; `model-rotation` is a
+  quaternion passed as `(x, y, z, w)`. The pre-existing 2mm plan-view Z-offset simply
+  adds onto the translation (translations commute).
+- The serialization loop previously collected files in a dict keyed by filepath, which
+  **collapsed same-file links into one pass** (one transform — the last link's — and
+  no query awareness): with two links of one file, only one showed in the drawing.
+  It now iterates one entry per link (`(path, file, transform, query)` tuples), and
+  intersects each link's drawing elements with
+  `ifcopenshell.util.selector.filter_elements(ifc, link.query)` so the drawing shows
+  what that link actually displays in the viewport.
+- `tool.Project.get_link_transformation_matrix(link)` is the shared accessor for the
+  stored 4×4 (None when identity/absent).
+- Verified headless with the window/door kit: moved window offset in the SVG by
+  exactly 5m × scale; unmoved door at its native position; both links present.
+
 ## Review round 1 (PR #8242, falken10vdl) — decisions
 
 - **Path-form mismatch → duplicate documents (confirmed bug, fixed).**
@@ -202,8 +227,13 @@ Six commits on `Linked_File_Features`:
   append placement (`tool/project.py`, `project/operator.py`, `project/decorator.py`).
 - `c14592ec0a` per-query caches, Description persistence, SKIP_SAVE.
 
-Plus the review-round path normalization in `get_linked_models_documents` /
-`LinkIfc` (see Review round 1), committed together with this note update.
+Plus:
+
+- `ee43ed5526` review-round path normalization in `get_linked_models_documents` /
+  `LinkIfc` (see Review round 1).
+- Drawing support for moved links and per-link queries in `create_drawing`
+  (`drawing/operator.py`, `tool/project.py`) — committed together with this note
+  update.
 
 End-to-end verified with a two-links-one-file kit (window/door, distinct queries):
 correct visuals on load, after save → reopen → reload, in both headless and windowed
@@ -230,3 +260,12 @@ Blender.
   bakes the first element's slice — same as normal import, but worth a look with types.
 - `bim.select_link_filepath` round trip when the reload dialog was opened for a
   non-active link, and dialog-state carry-over after editing the query *then* browsing.
+- **Drawing SVG guid cache vs moved links**: `create_drawing` skips elements whose
+  guids already exist in the drawing's SVG (`cached_linework`, invalidated only for
+  *edited host objects*). Moving a link does not invalidate its elements, so a
+  regenerated drawing keeps their old positions until the SVG is deleted. Candidate
+  fix: subtract a moved link's guids from `cached_linework` (compare stored transform
+  against the one recorded at last generation).
+- Same element appearing in two links of one file (overlapping queries) serializes
+  twice with different transforms; the SVG guid cache keeps whichever came first on
+  regeneration. Degenerate case — probably fine to ignore, but note it.