Refresh tile previews on every overlay show#10
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The cached CGImage from the previous close was being painted as hasRenderedFrame=true, which short-circuited snapshot() on the next show — so the user saw a stale frame until the live stream's first significant-change frame arrived (or forever, for idle windows). Drop the short-circuit so snapshot() always captures a fresh image, kick off snapshot+stream in parallel with the show animation instead of waiting 210ms, and stop gating the display path on the dirty-rect threshold (keep it only for the idle-dot signal) so the tile keeps tracking the source as frames arrive. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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Summary
hasRenderedFrame=trueshort-circuit sosnapshot()always captures a fresh image instead of leaving the cached CGImage on screen..completeframe the system delivers. The threshold is kept only for the idle-dot signal.Test plan