Initialize dimension navigation UI after scene load. Wires scene-dims
manager → optional slider panel → animation manager → reactive
listener, then triggers an initial update so data loads for the
starting slice. Returns early when no nD objects are found (3D-only
scene).
Initialize dimension navigation UI after scene load. Wires scene-dims manager → optional slider panel → animation manager → reactive listener, then triggers an initial update so data loads for the starting slice. Returns early when no nD objects are found (3D-only scene).