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Dion Moult
681de6f817
First real consumer of the v15 deferred property block, and an end-to-end demonstration that on-demand property loading works. On a left-click pick, logSelectedObjectGuidWeb ensures the owning model's deferred block is loaded (loadDeferredMetadataWeb — a network fetch the FIRST time, cached after) and logs the picked object's GUID to the console. Fix uncovered while wiring it: applyCachedModel rebases instance object_ids to a per-model global base (object_id_base) to keep them unique across models, but the deferred elements carry the sidecar's original local ids — so a lookup by the picked (global) id missed. Store object_id_base on the model and rebase the elements by it when the deferred block loads. Verified: with a streamed model, the deferred block is fetched ONLY after the first pick (not at load), and the pick logs a valid 22-char IFC GUID. 111/111 unit + 6/6 web smoke pass. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>