Fans/Artists Language + Onboarding Stabilization

This release focused on making Neufia feel simpler and less brittle while keeping scene personalization intact.

Across discovery and profile surfaces, user-facing language now emphasizes Fans and Artists. Group/solo distinctions still work, while persisted storage enums remain BAND|ARTIST|FAN for compatibility.

We also stabilized onboarding by removing duplicate hard redirect paths that could loop users back into setup during auth/profile hydration timing windows.

Instead, signed-in users with incomplete scene preferences now see a lightweight 'Finish your scene setup' prompt on Home and Settings, with a direct path to /onboarding when they are ready.

Validation included web typecheck, fresh deploy, and live chunk smoke checks to confirm the old redirect strings were gone and the new prompt was present.