fix(build): emit lean chunks after vite has done processing

closes #4737

Co-authored-by: green <green@sapphi.red>

src/node/plugin.ts

@@ -353,14 +353,18 @@ export async function createVitePressPlugin(
       return null
     },
 
-    generateBundle(_options, bundle) {
+    generateBundle: {
+      order: ssr ? null : 'post',
+      handler(_options, bundle) {
         if (ssr) {
           this.emitFile({
             type: 'asset',
             fileName: 'package.json',
             source: '{ "private": true, "type": "module" }'
           })
-      } else {
+          return
+        }
+
         // client build:
         // for each .md entry chunk, adjust its name to its correct path.
         for (const name in bundle) {