refactor(tenant): refine menu scope boundaries and document plan/tenant menu design

src/views/system/user/index.vue

@@ -185,17 +185,6 @@
           <el-input v-model="formData.nickname" placeholder="请输入用户昵称" />
         </el-form-item>
 
-        <el-form-item v-if="canManageTenantScope" label="租户身份" prop="tenantScope">
-          <el-select v-model="formData.tenantScope" placeholder="请选择租户身份">
-            <el-option
-              v-for="item in tenantScopeOptions"
-              :key="item.value"
-              :label="item.label"
-              :value="item.value"
-            />
-          </el-select>
-        </el-form-item>
-
         <el-form-item label="所属部门" prop="deptId">
           <el-tree-select
             v-model="formData.deptId"
@@ -268,7 +257,6 @@ import type { UserForm, UserQueryParams, UserItem } from "@/types/api";
 
 // ==================== 3.5 工具函数 ====================
 import { downloadFile, VALIDATORS } from "@/utils";
-import { hasPerm } from "@/utils/auth";
 // ==================== 4. API 服务 ====================
 import UserAPI from "@/api/system/user";
 import DeptAPI from "@/api/system/dept";
@@ -324,7 +312,6 @@ const dialogState = reactive({
 // 初始表单数据
 const initialFormData: UserForm = {
   status: CommonStatus.ENABLED,
-  tenantScope: undefined,
 };
 
 // 表单数据
@@ -344,19 +331,6 @@ const importDialogVisible = ref(false);
  */
 const drawerSize = computed(() => (appStore.device === DeviceEnum.DESKTOP ? "600px" : "90%"));
 
-const isPlatformUser = computed(() => {
-  return (userStore.userInfo?.tenantScope || "").toUpperCase() === "PLATFORM";
-});
-
-const canManageTenantScope = computed(
-  () => isPlatformUser.value && hasPerm("sys:tenant:switch", "button")
-);
-
-const tenantScopeOptions = [
-  { label: "平台", value: "PLATFORM" },
-  { label: "租户", value: "TENANT" },
-];
-
 // ==================== 表单验证规则 ====================
 
 const rules = reactive({
@@ -471,13 +445,6 @@ async function handleOpenDialog(id?: string): Promise<void> {
     dialogState.title = "新增用户";
     dialogState.mode = DialogMode.CREATE;
   }
-
-  // 仅平台用户可设置租户身份；无权限时避免提交该字段
-  if (canManageTenantScope.value) {
-    formData.tenantScope = formData.tenantScope || "TENANT";
-  } else {
-    formData.tenantScope = undefined;
-  }
 }
 
 /**