Engineering: Trimming web animations like video clips

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Technical discussion for Trimming web animations like video clips.

This article explains how Breatic maps a timeline position to a web animation’s source time, keeps trims non-destructive, and acknowledges seek requests across an iframe boundary.

Source snapshot: f350d3eb. Trimming predates the new layer transform controls; the snapshot covers editing and preview, with video export still future work.

Questions about time mapping, playback coordination, or the implementation are welcome here. General product questions belong in Q&A, and reproducible bugs belong in Issues.