当线下服务是一口价时，计价单位固定“次”，相当于"1”次”，建议频率的单位固定“次”默认固定这4个值，不允许修改

src/service/AddItems.vue

@@ -184,11 +184,16 @@ const isDeliveryRequired = computed(() => {
   return checkedList.value.includes('1') || form.sellType === '1';
 });
 
-// 线下服务：itemsList 和 system 类型都需要“服务所需时间”
+// 线下服务：itemsList 和 system 类型都需要”服务所需时间”
 const showServiceRequiredTime = computed(() => {
   return form.sellType === '2';
 });
 
+// 线下服务+一口价：固定计价单位、相当于、使用单位、建议频率单位
+const isOfflineServiceFixedPrice = computed(() => {
+  return form.sellType === '2' && form.pricingType === '0';
+});
+
 // 获取所有的供应商
 async function getSupplier(params: any) {
   supplierOptions.value = [];
@@ -768,6 +773,22 @@ watch(
   }
 );
 
+// 线下服务+一口价：自动填充固定值
+watch(
+  isOfflineServiceFixedPrice,
+  (val) => {
+    if (val) {
+      if (!form.cpFixedPricingRule) {
+        form.cpFixedPricingRule = { unitPrice: '', pricingUnit: '', convertDose: '', convertUnit: '' };
+      }
+      form.cpFixedPricingRule.pricingUnit = '次';
+      form.cpFixedPricingRule.convertDose = '1';
+      form.cpFixedPricingRule.convertUnit = '次';
+      suggestedFrequencyUnit.value = '次';
+    }
+  }
+);
+
 // 监听一口价单位变化，同步到建议频率单位
 watch(
   () => form.cpFixedPricingRule?.convertUnit,
@@ -946,13 +967,13 @@ function handleDerivation() {
         <span style="margin: 0 8px">元</span>
 
         <span class="label" style="margin-left: 32px">计价单位：</span>
-        <a-input v-model:value="form.cpFixedPricingRule.pricingUnit" placeholder="请输入" style="width: 100px" />
+        <a-input v-model:value="form.cpFixedPricingRule.pricingUnit" placeholder="请输入" style="width: 100px" :disabled="isOfflineServiceFixedPrice" />
 
         <span style="margin-left: 32px">相当于</span>
         <a-input v-model:value="form.cpFixedPricingRule.convertDose" placeholder="请输入"
-          style="width: 100px; margin-left: 8px" />
+          style="width: 100px; margin-left: 8px" :disabled="isOfflineServiceFixedPrice" />
         <vxe-select v-model="form.cpFixedPricingRule.convertUnit" :options="unitOptions" placeholder="请选择" clearable
-          transfer style="width: 100px; margin-left: 8px" />
+          transfer style="width: 100px; margin-left: 8px" :disabled="isOfflineServiceFixedPrice" />
 
         <span style="color: #aaa; margin-left: 8px">(使用单位)</span>
       </div>
@@ -992,7 +1013,7 @@ function handleDerivation() {
           <span>天</span>
           <a-input v-model:value="form.frequencyMeasure" placeholder="请输入" style="width: 100px; margin: 0 8px" />
           <vxe-select v-model="suggestedFrequencyUnit" :options="unitOptions" placeholder="请选择"
-            :clearable="form.pricingType !== '0'" transfer style="width: 100px; margin-left: 8px" />
+            :clearable="form.pricingType !== '0'" transfer style="width: 100px; margin-left: 8px" :disabled="isOfflineServiceFixedPrice" />
         </div>
       </a-form-item>
       <a-form-item label="服务所需时间："