v0.14.2 — empty gallery on first open, honest bake timing

Fixes the gallery opening empty until you press Refresh, and makes the bake timing measure what you actually wait for.

• Empty until Refresh. OnEnable starts the catalogue load, and a window Unity creates then immediately re-parents runs OnDisable in between, cancelling that request. The window now retries while the catalogue has never been answered, and treats a real failure as settled so a down network doesn't loop.
• "21 ms" was a tenth of the wait. That figure covers running the module and decoding its payload. Building the meshes, swapping the preview and freeing the old ones were unmeasured. Now reported end to end, with the split in the tooltip.