perf(field): 根据 slot 内容决定 块状 线条 状态

src/module/field/index.vue

@@ -1,14 +1,25 @@
 <template>
-  <fieldset class="layui-elem-field">
+
+  <fieldset v-if="slot.default" class="layui-elem-field">
     <legend>{{ title }}</legend>
     <div class="layui-field-box">
       <slot />
     </div>
   </fieldset>
+
+  <fieldset v-else class="layui-elem-field layui-field-title">
+    <legend><a name="docend">结语</a></legend>
+  </fieldset>
+
 </template>
 
 <script setup name="LayField" lang="ts">
-const props = defineProps<{
-  title?: string
-}>()
+import { defineProps, useSlots } from 'vue'
+
+const slot = useSlots()
+
+const props =
+  defineProps<{
+    title?: string
+  }>()
 </script>