spiceflow@1.26.0-rsc.18

1. Toast notifications for uncaught server action errors — when a server action throws and the caller has no try/catch or ErrorBoundary, the framework now shows a dismissable error toast instead of crashing the page. Users can also import toast from spiceflow/react for custom notifications:

   import { toast } from 'spiceflow/react'
   
   toast.error('Something failed')
   toast.success('Saved!')
   toast('Info message')

   If the user wraps with <ErrorBoundary>, it catches the error normally and no toast fires.

2. Fix RSC navigation across deployments — soft navigations between different deployment versions no longer fail silently. Static deployment headers are preserved correctly so the client detects deploy skew and triggers a hard reload when needed.

3. Fix infinite resolveId recursion in production builds — the spiceflow:dedupe-singleton and rsc:virtual-client-package plugins could recurse infinitely during the RSC transform step, causing builds to hang. The dedupe resolver now passes a custom marker to prevent re-entry.

4. Fix useId() hydration mismatch in production builds — a missing toast renderer placeholder in the SSR tree caused React to generate different IDs during server rendering and client hydration, breaking libraries that use useId() internally (base-ui, radix-ui, headless-ui, etc).

5. Update Vite ecosystem — vite 8.2.1, @vitejs/plugin-rsc 0.5.34, @vitejs/plugin-react 6.0.5, react 19.2.8.