Product Roundup #34: reactive pagination, request-seeded search and stronger infinite scroll in the Nuxt module

A round of smaller improvements to the Nuxt module's search, pagination and error handling.

• Reactive pagination - Pagination now reacts to a _page state ref, so moving between pages stays perfectly in sync with your UI.
• Search seeded from the request - useFronticSearch can now be seeded with state from the incoming request, so results render correctly on first paint with no client-side flash.
• Stronger infinite-scroll options - Infinite mode now honors enabled, gcTime, and keepPreviousData instead of discarding them, giving you finer control over caching and loading behavior.
• More reliable timeouts - The 504 timeout branch is now reachable and error payload types are exported, so you can handle upstream slowness cleanly and with full type safety.
• Context-aware query keys - Query keys are now derived from the context domain the request carries, keeping cached data correctly scoped per context.
• Accurate listing types - Listing responses are now read through their real types, improving autocomplete and catching mismatches early.