diff --git a/src/main/java/com/budwk/app/zhgh/spread/service/impl/SpreadCategoryServiceImpl.java b/src/main/java/com/budwk/app/zhgh/spread/service/impl/SpreadCategoryServiceImpl.java
index 3cf1d81c..b4670347 100644
--- a/src/main/java/com/budwk/app/zhgh/spread/service/impl/SpreadCategoryServiceImpl.java
+++ b/src/main/java/com/budwk/app/zhgh/spread/service/impl/SpreadCategoryServiceImpl.java
@@ -36,7 +36,9 @@ public class SpreadCategoryServiceImpl extends BaseServiceImpl<SpreadCategory> i
     public List<NutMap> categoryTree(boolean visibleOnly) {
         List<SpreadCategory> categories = listCategories(visibleOnly);
         Map<String, NutMap> nodeMap = new LinkedHashMap<>();
+        Map<String, List<NutMap>> childrenMap = new LinkedHashMap<>();
         for (SpreadCategory category : categories) {
+            List<NutMap> children = new ArrayList<>();
             nodeMap.put(category.getId(), NutMap.NEW()
                     .addv("id", category.getId())
                     .addv("parentId", category.getParentId())
@@ -45,7 +47,8 @@ public class SpreadCategoryServiceImpl extends BaseServiceImpl<SpreadCategory> i
                     .addv("sortOrder", category.getSortOrder())
                     .addv("visible", category.getVisible())
                     .addv("slider", category.getSlider())
-                    .addv("children", new ArrayList<>()));
+                    .addv("children", children));
+            childrenMap.put(category.getId(), children);
         }
         List<NutMap> roots = new ArrayList<>();
         for (NutMap node : nodeMap.values()) {
@@ -53,9 +56,16 @@ public class SpreadCategoryServiceImpl extends BaseServiceImpl<SpreadCategory> i
             if ("0".equals(parentId) || !nodeMap.containsKey(parentId)) {
                 roots.add(node);
             } else {
-                nodeMap.get(parentId).getList("children", NutMap.class).add(node);
+                // 直接向节点持有的原始集合追加，避免 NutMap 类型转换后子节点没有写回。
+                childrenMap.get(parentId).add(node);
             }
         }
+        // 叶子栏目不返回空 children，避免级联选择器误判为仍有下一级。
+        nodeMap.forEach((id, node) -> {
+            if (childrenMap.get(id).isEmpty()) {
+                node.remove("children");
+            }
+        });
         return roots;
     }
 
@@ -125,11 +135,9 @@ public class SpreadCategoryServiceImpl extends BaseServiceImpl<SpreadCategory> i
         if (category == null || StrUtil.isBlank(category.getName())) {
             throw new RuntimeException("栏目名称不能为空");
         }
-        if (StrUtil.isBlank(category.getCode())) {
-            throw new RuntimeException("栏目编码不能为空");
-        }
         category.setName(category.getName().trim());
-        category.setCode(category.getCode().trim());
+        // 参考模块不要求用户维护栏目编码，空值统一保存为 NULL。
+        category.setCode(StrUtil.isBlank(category.getCode()) ? null : category.getCode().trim());
         category.setParentId(StrUtil.blankToDefault(category.getParentId(), "0"));
         if (category.getId() != null && category.getId().equals(category.getParentId())) {
             throw new RuntimeException("上级栏目不能选择自身");
@@ -146,17 +154,12 @@ public class SpreadCategoryServiceImpl extends BaseServiceImpl<SpreadCategory> i
         Cnd nameCnd = Cnd.where("name", "=", category.getName())
                 .and("parentId", "=", category.getParentId())
                 .and("delFlag", "=", false);
-        Cnd codeCnd = Cnd.where("code", "=", category.getCode()).and("delFlag", "=", false);
         if (StrUtil.isNotBlank(excludeId)) {
             nameCnd.and("id", "!=", excludeId);
-            codeCnd.and("id", "!=", excludeId);
         }
         if (count(nameCnd) > 0) {
             throw new RuntimeException("同级栏目名称已存在");
         }
-        if (count(codeCnd) > 0) {
-            throw new RuntimeException("栏目编码已存在");
-        }
     }
 
     private void applyDefaults(SpreadCategory category) {
diff --git a/src/main/resources/db/spread_create.sql b/src/main/resources/db/spread_create.sql
index 44912c29..4bfda893 100644
--- a/src/main/resources/db/spread_create.sql
+++ b/src/main/resources/db/spread_create.sql
@@ -3,7 +3,7 @@ CREATE TABLE IF NOT EXISTS `spread_category` (
   `id` varchar(32) NOT NULL COMMENT 'ID',
   `parentId` varchar(32) NOT NULL DEFAULT '0' COMMENT '父栏目ID，0表示顶级栏目',
   `name` varchar(100) NOT NULL COMMENT '栏目名称',
-  `code` varchar(50) NOT NULL COMMENT '栏目编码',
+  `code` varchar(50) DEFAULT NULL COMMENT '栏目编码（兼容预置数据，页面无需维护）',
   `sortOrder` int NOT NULL DEFAULT 255 COMMENT '排序，数值越小越靠前',
   `visible` tinyint NOT NULL DEFAULT 1 COMMENT '是否可见：0否，1是',
   `slider` tinyint NOT NULL DEFAULT 0 COMMENT '是否参与轮播：0否，1是',
diff --git a/src/main/resources/views/platform/zhgh/spread/category/index.html b/src/main/resources/views/platform/zhgh/spread/category/index.html
index a1922d9a..8582a479 100644
--- a/src/main/resources/views/platform/zhgh/spread/category/index.html
+++ b/src/main/resources/views/platform/zhgh/spread/category/index.html
@@ -6,11 +6,12 @@ layout("/layouts/platform.html"){
         <el-card shadow="never">
             <table-tool :app="this" label="风采墙栏目">
                 <el-button size="medium" type="primary" icon="el-icon-plus" @click="openAdd">新增栏目</el-button>
+                <el-button size="medium" icon="el-icon-s-unfold" @click="expandAll">展开全部</el-button>
+                <el-button size="medium" icon="el-icon-s-fold" @click="collapseAll">折叠全部</el-button>
             </table-tool>
-            <el-table v-loading="loading" :data="tableData" border row-key="id"
+            <el-table ref="categoryTable" v-loading="loading" :data="tableData" border row-key="id"
                       :tree-props="{children: 'children'}" default-expand-all>
                 <el-table-column prop="name" label="栏目名称" min-width="220"></el-table-column>
-                <el-table-column prop="code" label="栏目编码" min-width="180"></el-table-column>
                 <el-table-column prop="sortOrder" label="排序" width="90" align="center"></el-table-column>
                 <el-table-column label="显示" width="100" align="center">
                     <template slot-scope="{row}">
@@ -46,9 +47,6 @@ layout("/layouts/platform.html"){
             <el-form-item label="栏目名称" prop="name">
                 <el-input v-model.trim="formData.name" maxlength="100" show-word-limit></el-input>
             </el-form-item>
-            <el-form-item label="栏目编码" prop="code">
-                <el-input v-model.trim="formData.code" maxlength="50" placeholder="例如：teacher_style"></el-input>
-            </el-form-item>
             <el-form-item label="排序" prop="sortOrder">
                 <el-input-number v-model="formData.sortOrder" :min="0" :max="9999" style="width: 100%"></el-input-number>
             </el-form-item>
@@ -88,10 +86,6 @@ layout("/layouts/platform.html"){
                 rules: {
                     parentId: [{required: true, message: "请选择上级栏目", trigger: "change"}],
                     name: [{required: true, message: "请输入栏目名称", trigger: "blur"}],
-                    code: [
-                        {required: true, message: "请输入栏目编码", trigger: "blur"},
-                        {pattern: /^[A-Za-z][A-Za-z0-9_-]*$/, message: "编码须以字母开头，仅支持字母、数字、下划线和短横线", trigger: "blur"}
-                    ],
                     sortOrder: [{required: true, message: "请输入排序", trigger: "change"}]
                 }
             }
@@ -104,6 +98,8 @@ layout("/layouts/platform.html"){
                     if (resp.code === 0) {
                         this.tableData = resp.data || []
                         this.rootOptions = (resp.data || []).slice()
+                        // 栏目数据为异步加载，赋值后显式展开，避免组件只展示顶级栏目。
+                        this.$nextTick(this.expandAll)
                     } else {
                         this.$message.warning(resp.msg)
                     }
@@ -112,7 +108,7 @@ layout("/layouts/platform.html"){
             // 构造新增栏目默认值。
             openAdd() {
                 this.dialogTitle = "新增栏目"
-                this.formData = {parentId: "0", name: "", code: "", sortOrder: 255, visible: 1, slider: 0}
+                this.formData = {parentId: "0", name: "", sortOrder: 255, visible: 1, slider: 0}
                 this.dialogVisible = true
                 this.$nextTick(() => this.$refs.categoryForm && this.$refs.categoryForm.clearValidate())
             },
@@ -124,6 +120,28 @@ layout("/layouts/platform.html"){
                 this.dialogVisible = true
                 this.$nextTick(() => this.$refs.categoryForm && this.$refs.categoryForm.clearValidate())
             },
+            // 展开当前栏目树中的全部父级栏目。
+            expandAll() {
+                this.setAllExpanded(true)
+            },
+            // 折叠当前栏目树中的全部父级栏目。
+            collapseAll() {
+                this.setAllExpanded(false)
+            },
+            // Element UI 异步树表格需要逐行设置展开状态。
+            setAllExpanded(expanded) {
+                const table = this.$refs.categoryTable
+                if (!table) return
+                const walk = rows => {
+                    (rows || []).forEach(row => {
+                        if (row.children && row.children.length) {
+                            table.toggleRowExpansion(row, expanded)
+                            walk(row.children)
+                        }
+                    })
+                }
+                walk(this.tableData)
+            },
             // 校验后调用新增或编辑接口。
             submit() {
                 this.$refs.categoryForm.validate(valid => {