fix(pages): collect CSS from dynamicImports to prevent FOUC

collectPagesManifestFiles only traversed chunk.imports, missing CSS
from dynamically imported modules like layouts. Since layouts are
listed under dynamicImports in the Vite manifest, their CSS was never
injected as <link rel="stylesheet"> in <head>, causing a flash of
unstyled content on every page load.

Now traverses both imports and dynamicImports so layout CSS is
included in the initial HTML response.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: Brooooooklyn

packages/void/src/router/compile.ts

@@ -709,8 +709,13 @@ function compilePageRoutes(lines: string[], scan: ScanResult, pages: PagesCompil
   lines.push(`    if (seen.has(currentId)) continue;`);
   lines.push(`    seen.add(currentId);`);
   lines.push(`    const chunk = manifest[currentId];`);
-  lines.push(`    if (!chunk || !Array.isArray(chunk.imports)) continue;`);
-  lines.push(`    for (const importedId of chunk.imports) toVisit.push(importedId);`);
+  lines.push(`    if (!chunk) continue;`);
+  lines.push(`    if (Array.isArray(chunk.imports)) {`);
+  lines.push(`      for (const importedId of chunk.imports) toVisit.push(importedId);`);
+  lines.push(`    }`);
+  lines.push(`    if (Array.isArray(chunk.dynamicImports)) {`);
+  lines.push(`      for (const importedId of chunk.dynamicImports) toVisit.push(importedId);`);
+  lines.push(`    }`);
   lines.push(`  }`);
   lines.push(`  return Array.from(seen);`);
   lines.push(`}`);