Update v1.0.4

• New ⏯ toggle button (next to "Save frame") to show/hide the native <video> controls. The preference is persisted per file in localStorage and restored on reload. Useful when the native controls overlap the crop box during corner-resize.
• Restored the pointer cursor feedback: the cursor changes to move (body drag) or nwse-resize / nesw-resize (corner handles) while dragging, and returns to default on release.