The debounced auto-save compared painter values against the on-disk
baseline, so after any slider/toggle change the values stayed different
every frame and the 0.5s timer was pushed forward endlessly, never
firing. Saving only happened via the direct drag-end path. Compare
against the previous-frame snapshot instead so the timer fires once the
values settle. Also pin hudSaveId to a stable key so the layout is
shared across scenes instead of split per-scene.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
adminandClaude Opus 4.8
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