feat: 重置问题搜索字段以清空搜索条件

src/views/safetyExam/questionBank/maintenance.vue

@@ -196,6 +196,7 @@
       async open(row, type = 'add') {
         this.visible = true;
         this.dialogType = type;
+        this.questionSearch = '';
         const questionBankId = row && (row.id || row.questionBankId);
         if (questionBankId) {
           this.bankForm = {