Issue: When selecting a sphere and clicking "— Remove", there is no safety countdown.
Problem: The action is executed immediately, which can lead to accidental deletion of spheres and their associated data.
No "Undo" Capability
Issue: Once a sphere is removed, there is no "Undo" snackbar or option to restore the sphere.
Problem: The deletion appears to be permanent with no immediate way to recover the Arcsphere state if the button was clicked by mistake.
Safety Risk
Observation: The "Remove" button is located very close to the central interaction area (as seen in the screenshot), increasing the likelihood of accidental taps.
