fix: fix define config

packages/theme/src/node/define.ts

@@ -1,7 +1,7 @@
 import type { UserConfig } from '@vuepress/cli'
 import type { BundlerConfig } from '@vuepress/core'
 import type {
-  PlumeThemeNotesConfigItem,
+  PlumeThemeNotesItem,
   PlumeThemeNotesOptions,
   PlumeThemeOptions,
 } from '../shared'
@@ -17,5 +17,5 @@ export const definePlumeNotesConfig = (
 ): PlumeThemeNotesOptions => notes
 
 export const definePlumeNotesItemConfig = (
-  item: PlumeThemeNotesConfigItem
-): PlumeThemeNotesConfigItem => item
+  item: PlumeThemeNotesItem
+): PlumeThemeNotesItem => item

packages/theme/src/node/plugins/markdownEnhance.ts

@@ -7,13 +7,16 @@ export const resolveMarkdownEnhance = (
 ): PluginConfig => {
   if (plugins.markdownEnhance === false) return ['', false]
   return mdEnhance(
-    plugins.markdownEnhance || {
-      container: true, // info note tip warning danger details
-      codegroup: true,
-      align: true,
-      mark: true,
-      tasklist: true,
-      demo: true,
-    }
+    Object.assign(
+      {
+        container: true, // info note tip warning danger details
+        codegroup: true,
+        align: true,
+        mark: true,
+        tasklist: true,
+        demo: true,
+      },
+      plugins.markdownEnhance || {}
+    )
   )
 }