perf: 过滤器必填逻辑

core/frontend/src/lang/en.js

@@ -2046,6 +2046,7 @@ export default {
     back_parent: 'Back to previous'
   },
   panel: {
+    required_tips: 'Cannot be empty!',
     filter_no_select: 'Filter components do not need to be selected',
     first_item: 'First item',
     forbidden_copy: 'Forbidden copy',

core/frontend/src/lang/tw.js

@@ -2038,6 +2038,7 @@ export default {
     back_parent: '返回上一級'
   },
   panel: {
+    required_tips: '必填項不能爲空！',
     filter_no_select: '過濾組件無需選擇',
     first_item: '首項',
     forbidden_copy: '當前組件不允許復製',

core/frontend/src/lang/zh.js

@@ -2039,6 +2039,7 @@ export default {
     back_parent: '返回上一级'
   },
   panel: {
+    required_tips: '必填项不能为空！',
     filter_no_select: '过滤组件无需选择',
     first_item: '首项',
     forbidden_copy: '当前组件不允许复制',