spiceflow@1.26.0-rsc.16

1. knownPaths in SpiceflowRegister — declare extra typed paths for mounted sub-apps, docs generators, or external route tables. Declared paths flow into router.href(), <Link>, router.push(), and router.replace() with full :param and * wildcard support:

   declare module 'spiceflow/react' {
     interface SpiceflowRegister {
       app: typeof app
       knownPaths: '/docs' | '/docs/:slug' | '/files/*'
     }
   }
   
   router.href('/docs/:slug', { slug: 'intro' }) // typed
   router.href('/files/*', { '*': 'a/b.txt' })   // typed

2. '/' is always valid in typed hrefs — <Link href="/">, router.href('/'), and router.push('/') now type-check correctly even when the home route registers with path ''. Also fixes buildHref('') returning an empty string instead of '/'.

3. Fix SSR infinite recursion with wildcard layouts in mounted apps — when a parent app registers a wildcard layout and a mounted child app registers a layout on the same path, route ids collided causing the child layout to resolve to itself, crashing with "Maximum call stack size exceeded". Layout ids are now uniquified per request.