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- feat(migration): 045_asset_libraries — new asset_libraries table (blend_file_path, catalog JSONB) - feat(model): AssetLibrary SQLAlchemy model in domains/materials/models.py - feat(api): POST/GET/PATCH/DELETE /api/asset-libraries + /upload-blend + /refresh-catalog endpoints - feat(celery): refresh_asset_library_catalog task on thumbnail_rendering queue — runs Blender headless - feat(blender): catalog_assets.py — extracts asset-marked materials + node_groups from .blend - feat(blender): asset_library.py — apply_asset_library_materials + apply_asset_library_node_groups helpers - feat(blender): export_gltf.py — STEP→STL→GLB production export with optional asset library - feat(blender): export_blend.py — STEP→STL→.blend production export with pack_all() - feat(frontend): api/assetLibraries.ts — full CRUD API client - feat(frontend): AssetLibraryPanel in Admin.tsx — upload, refresh, expand catalog view - docs: Blender asset_data marking requirement learning in LEARNINGS.md Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>