refactor(xumu): 修改死亡录入表单字段

- 将 "createTime" 字段重命名为 "deathTime"，以更准确地表示死亡日期
- 更新相应的标签、规则和数据显示

project/xumu/AppDeathManage/add.vue

@@ -122,9 +122,9 @@ export default {
       </ai-card>
       <ai-card title="死亡录入">
         <div class="grid">
-          <el-form-item label="死亡日期" prop="createTime" :rules="[{required:true,message:'请选择死亡日期'}]">
-            <el-date-picker v-if="isAdd||isEdit" v-model="detail.createTime"/>
-            <b v-text="detail.createTime"/>
+          <el-form-item label="死亡日期" prop="deathTime" :rules="[{required:true,message:'请选择死亡日期'}]">
+            <el-date-picker v-if="isAdd||isEdit" v-model="detail.deathTime"/>
+            <b v-text="detail.deathTime"/>
           </el-form-item>
           <el-form-item label="死亡原因" prop="reason" :rules="[{required:true,message:'请选择死亡原因'}]">
             <ai-select v-if="isAdd||isEdit" v-model="detail.reason" dict="deathReason"/>