fix: complete admin input hints

src/modules/iam/pages/PermissionsView.vue

@@ -313,7 +313,7 @@ onMounted(loadPermissions)
             <el-form-item label="上级资源" prop="parentId" :required="['按钮', '页面', '接口'].includes(form.type)"><el-select v-model="form.parentId" clearable placeholder="作为一级资源"><el-option v-for="item in parentOptions" :key="item.id" :label="`${item.name} (${item.code})`" :value="item.id" /></el-select></el-form-item>
             <el-form-item v-if="['菜单', '页面'].includes(form.type)" label="路由路径" prop="path" required><el-input v-model="form.path" placeholder="如：/customers" /></el-form-item>
             <el-form-item v-if="form.type === '接口'" label="HTTP 方法" prop="method" required><el-select v-model="form.method"><el-option v-for="method in ['GET', 'POST', 'PUT', 'PATCH', 'DELETE']" :key="method" :label="method" :value="method" /></el-select></el-form-item>
-            <el-form-item label="显示排序" prop="sort" required><el-input-number v-model="form.sort" :min="0" :max="999" controls-position="right" /></el-form-item>
+            <el-form-item label="显示排序" prop="sort" required><el-input-number v-model="form.sort" :min="0" :max="999" controls-position="right" placeholder="请输入排序值" /></el-form-item>
           </div>
         </FormSection>
         <div class="form-callout"><Braces :size="18" /><div><strong>权限编码约定</strong><p>使用稳定的“业务域:资源:动作”编码；资源类型与后端 MENU、PAGE、BUTTON、API 契约一致。</p></div></div>