Stepbook v1.4.0

What's new

• Fix: Annotations now follow the image on browser resize — Annotations were stored as absolute display-pixel coordinates, causing them to drift when the window was resized. They are now stored in native image coordinates with Konva stage scaling, so they track the image correctly at any window size. Existing annotations are auto-migrated.
• Paste images from clipboard — Press Ctrl+V / Cmd+V on the sequence editor to add a step from a clipboard image (e.g. screenshots).