fix: add prerender entry pages for SPA static function cache

The SPA requires __tsr/staticServerFnCache/ entries generated during
prerender for each route's static server functions. The root page (/)
is a JS redirect with no crawlable links, so even with crawlLinks
enabled, only / was prerendered.

Add /en and /zh as explicit entry points so the prerender crawls all
doc pages from sidebar navigation and generates complete static
function cache entries.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: pescn

vite.config.ts

@@ -28,7 +28,7 @@ export default defineConfig({
           crawlLinks: true,
         },
       },
-      pages: [],
+      pages: [{ path: '/en' }, { path: '/zh' }],
     }),
     react(),
   ],