Step 1
Create the company profile without manual API calls.
This route already runs against the real `POST /companies` backend endpoint. After submit, staff lands on a read-only company profile and sees the saved data returned by the API.
What appears after submit
Creates a real company record instead of a temporary draft stored only in frontend state.
After the redirect, staff sees the actual saved company data returned by the backend.
This slice proves company onboarding against the real backend without inventing login, roles, or tenant session state.