fix: bug#10990

src/views/rule-engine/Scene/Save/components/DropdownButton/DropdownButton.vue

@@ -151,7 +151,7 @@ watchEffect(() => {
   if (option) {
     label.value = option[props.labelName] || option.name
   } else {
-    label.value = props.value || props.placeholder
+    label.value = props.value !== undefined ? props.value : props.placeholder
   }
 })
 

src/views/rule-engine/Scene/Save/components/ParamsDropdown/index.vue

@@ -166,7 +166,7 @@ watchEffect(() => {
     if (isArray(props.value)) {
       doubleNull = !!props.value.filter(item => !!item).length
     }
-    label.value = props.value && !doubleNull ? props.value : props.placeholder
+    label.value = props.value !== undefined && !doubleNull ? props.value : props.placeholder
   }
 })
 

src/views/rule-engine/Scene/Save/components/Terms/TermsItem.vue

@@ -97,7 +97,7 @@ const rules = [
         if (!v.termType) {
           return Promise.reject(new Error('请选择操作符'));
         }
-        if (!v.value?.value) {
+        if (v.value?.value !== undefined) {
           return Promise.reject(new Error('请选择或输入参数值'));
         }
         if (