provider-and-init-rules

@armanisadeghi

Enforces initialization, provider, and data-fetching rules for the app shell, layout, and global provider tree. Use when working on app/Providers.tsx, app/DeferredSingletons.tsx, any layout.tsx, any provider file, any context that wraps children globally, StoreProvider, or when adding new providers, data-fetching to the startup path, or useEffect calls that run on mount in upper-level components. Also use when someone references Redux user state, auth checks, isAdmin, isGuest, or fingerprintId on the client side.