💡 Dragging Items around Should Move Other Items in the Timeline

When dragging a timeline item over another, the existing item should move forward to make space - not get hidden or relocated. This creates a smoother, more intuitive editing experience.

How it should work:

• Dropping or resizing an item should push other items forward on the same track.

• No auto-layering or jumping to another row.

• Tracks should behave like a stacked queue, shifting as needed to prevent overlap.