The catalog was gated on ``currentStep === startStep`` so it would
re-appear at step 1 whenever ``providerHint`` skipped the catalog (e.g.
GPU Service's "Add a Kubernetes Cluster" empty-state CTA). Result: the
configure step rendered the catalog *plus* the Name/Description/Advanced
form together, with Kubernetes shown as already selected — confusing
and ugly.
Pin the catalog to step 0 explicitly. ``startStep`` was only used to
seed ``currentStep``, so it's inlined into the ``useState`` initializer
to keep the "skip the catalog when providerHint is set" intent in one
place. Pre-selecting a provider now correctly lands the user straight
on the configure form alone.
