fix: Add geometry quarantine to BuildingPlacementPreview#1128
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BuildingPlacementPreview was disposing geometry immediately during building placement updates, which happens frequently during gameplay. This could cause WebGPU "setIndexBuffer" crashes when the GPU still had pending draw commands using those buffers. Changes: - Add geometryQuarantine array and GEOMETRY_QUARANTINE_FRAMES constant - Add queueGeometryForDisposal() and processGeometryQuarantine() methods - Update clearQueueVisuals() to use quarantine for queue line geometry - Update disposeGroup() to use quarantine for all child geometries - Update updateGridMesh() to use quarantine when replacing grid - Update clearMeshes() to use quarantine for grid mesh - Update update() to process quarantine each frame - Update dispose() to flush quarantine during teardown https://claude.ai/code/session_01LA6RwJfSB6nsab6v8oAGf9
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BuildingPlacementPreview was disposing geometry immediately during building placement updates, which happens frequently during gameplay. This could cause WebGPU "setIndexBuffer" crashes when the GPU still had pending draw commands using those buffers.
Changes:
https://claude.ai/code/session_01LA6RwJfSB6nsab6v8oAGf9