Add 'tool' tag to nav and unit conversion tool.

astro.config.mjs

@@ -1,6 +1,6 @@
 import { defineConfig } from 'astro/config';
-
 import sitemap from "@astrojs/sitemap";
+import vue from "@astrojs/vue";
 
 // https://astro.build/config
 export default defineConfig({
@@ -28,13 +28,15 @@ export default defineConfig({
     }
   },
   site: 'https://lishouzhong.com',
-  integrations: [sitemap({
-    // entryLimit: 10000,
-    // customPages: [],
-    // filter: (page) => { },
-    // lastmod: new Date('2022-02-24'),
-    // serialize(item) {
-    //   return item;
-    // }
-  })]
+  integrations: [
+    sitemap({
+      // entryLimit: 10000,
+      // customPages: [],
+      // filter: (page) => { },
+      // lastmod: new Date('2022-02-24'),
+      // serialize(item) {
+      //   return item;
+      // }
+    }),
+    vue()]
 });