v0.2.2

Added

• Playhead + click-to-seek on the spectrogram preview: a red vertical line shows the playback position while playing; click anywhere on the spectrogram to jump to that time (and to start playback if nothing is playing). Clicks inside the watermark region are ignored so drag/resize keeps working.

Changed

• Much faster preview when dragging the watermark region. The preview now embeds the watermark only in a short window around the selected time range and splices that window's spectrogram columns into the cached original — instead of re-embedding across the entire file and recomputing the full spectrogram on every update. On long audio this removes the biggest source of lag.
• Instant Play after the preview updates. The watermarked samples produced by the preview are cached and reused by Play, so you no longer wait for a second watermark render the moment you press play. If you press Play before the preview has caught up, the old render path runs as a fallback.