feat(theme): don't print navbar when disabled

src/client/theme-default/components/VPLocalNav.vue

@@ -44,7 +44,8 @@ const classes = computed(() => {
   return {
     VPLocalNav: true,
     fixed: empty.value,
-    'reached-top': y.value >= navHeight.value
+    'reached-top': y.value >= navHeight.value,
+    'screen-only': frontmatter.value.navbar === false,
   }
 })
 </script>

src/client/theme-default/styles/base.css

@@ -250,3 +250,9 @@ mjx-container {
 mjx-container > svg {
   margin: auto;
 }
+
+@media print {
+  .screen-only {
+    display: none !important;
+  }
+}