message: fix: fix sevel-preprocess build
diff: @@ -40,7 +40,7 @@ export function fowerSveltePreprocess(): PreprocessorGroup {
  markup: async ({ filename, content }) => {
  let propList: any[] = []
  - if (filename.endsWith('@sapper/internal/App.svelte')) return { code: content }
  + if (filename?.endsWith('@sapper/internal/App.svelte')) return { code: content }
  const processor: any = posthtml([
  (tree) => {
  