过滤栏没有字段时自动隐藏不显示占位

apps/jingrow/frontend/src/core/components/FilterBar.vue

@@ -1,13 +1,8 @@
 <template>
-  <div class="elegant-filter-bar">
+  <div v-if="filterableFields.length > 0" class="elegant-filter-bar">
     <!-- 过滤条件内容 -->
     <div class="filter-content">
-      <div v-if="filterableFields.length === 0" class="empty-state">
-        <i class="fa fa-filter"></i>
-        <span>{{ t('暂无可过滤的字段') }}</span>
-      </div>
-      
-      <div v-else class="filter-row">
+      <div class="filter-row">
         <div 
           v-for="field in filterableFields" 
           :key="field.fieldname"