Summary

• Clear queried linked-element state when unloading the link that supplied it.
• Preserve valid queried-element state when unloading a different link.
• Add regression coverage for both behaviours.

Fixes #9322.

Root cause

UnloadLink removed the linked geometry but did not clear the associated queried-object properties or cached LinksData.linked_data. The Links panel could therefore continue displaying the identity of an element from an unloaded link. Reloading a link inherited the same problem because it uses the unload lifecycle internally.

User impact

After Unload Link or Reload Link, the Links panel no longer presents stale element identification. Query data belonging to another loaded link remains intact.

Validation

• Manual reproduction confirmed with Bonsai 0.8.6-alpha260808 (0a51ebd), Blender 5.1.2 and Debian Linux.
• Patch based on bonsai-0.8.6-alpha2608132105 (1af5cc9).
• git diff --check: passed.
• Python compilation check: passed.
• Local Black check on the two changed files: passed unchanged.
• Ruff check: passed.
• GitHub Actions ci/compile-and-test: passed.
• The Blender regression tests were not run locally because the full pytest-blender development environment was unavailable.

CI baseline note

The GitHub Actions ci-lint/lint-formatting job currently fails because psf/black@stable installed Black 26.5.1 and flagged these three pre-existing files from the unchanged v0.8.0 base:

• src/ifcopenshell-python/test/api/alignment/test_create.py
• src/ifcopenshell-python/ifcopenshell/util/unit.py
• src/ifcopenshell-python/test/api/alignment/test_referent_names.py

None of these files is modified by this PR. Syntax checking, Ruff and both ty checks within the lint job passed. No unrelated formatting changes have been added to this patch.

AI assistance disclosure

The diagnosis, patch, regression tests and pull-request text were developed with OpenAI Codex/ChatGPT under the contributor's direction. The contributor reviewed the changes and performed the reported manual validation.