diff --git a/src/components/GroupTreeSearchPanel.vue b/src/components/GroupTreeSearchPanel.vue
index 2da0ea7..b5e6458 100644
--- a/src/components/GroupTreeSearchPanel.vue
+++ b/src/components/GroupTreeSearchPanel.vue
@@ -285,10 +285,13 @@ defineExpose({
 .tree-body {
     flex: 1;
     min-height: 0;
+    display: flex;
+    flex-direction: column;
 }
 
-.tree-body :deep(.ztree) {
-    height: 100%;
-    overflow-y: auto;
+/* 滚动职责统一由 MyTree(.my-tree > .ztree) 承担：此处只负责把可用高度传给子组件 */
+.tree-body > .my-tree {
+    flex: 1;
+    min-height: 0;
 }
 </style>
diff --git a/src/components/MyTree.vue b/src/components/MyTree.vue
index 5c32ab2..9ec4355 100644
--- a/src/components/MyTree.vue
+++ b/src/components/MyTree.vue
@@ -1,9 +1,35 @@
 <template>
-    <div>
+    <div class="my-tree">
         <div :id="domId" :ref="domId" class="ztree"></div>
     </div>
 </template>
 <script>
+/**
+ * 节点规范化兜底：zTree 判定父节点的规则是「children 是数组即 isParent=true」（jquery.ztree.all.min.js
+ * 中 `tools.isArray(s) ? (data.nodeIsParent(setting,n,!0), ...)`），因此叶子节点只要被构造成
+ * `children: []` 就会渲染出 +/− 展开图标——此时再写 isParent:false 也无效（被数组分支覆盖）。
+ * 这里统一按「空 children 不挂键」，与参考实现 GroupTreeSearchPanel.formatTree 的口径一致。
+ */
+function normalizeTreeNodes(nodes) {
+    if (Array.isArray(nodes)) {
+        nodes.forEach(normalizeTreeNode);
+    } else if (nodes) {
+        normalizeTreeNode(nodes);
+    }
+}
+
+function normalizeTreeNode(node) {
+    if (!node || typeof node !== "object") return;
+    const kids = node.children;
+    if (Array.isArray(kids) && kids.length > 0) {
+        node.isParent = true;
+        kids.forEach(normalizeTreeNode);
+    } else {
+        delete node.children;
+        node.isParent = false;
+    }
+}
+
 export default {
     props: {
         treeData: {
@@ -65,6 +91,7 @@ export default {
         },
         initTree(_data, _domId) {
             const _this = this;
+            normalizeTreeNodes(_data);
             _this.treeSetting.callback.onClick = (event, treeId, treeNode, clickFlag) => {
                 // console.log(event, treeId, treeNode, clickFlag);
                 if (_this.isCheck) {
@@ -132,7 +159,10 @@ export default {
             var node = treeObj.getNodesByFilter(node => node.id == id, true);
             var pnode = node.getParentNode();
             treeObj.removeNode(node);
-            pnode.isParent = true;
+            // 同步父节点的父/叶状态：删掉最后一个子节点后不能继续显示 +/− 展开图标
+            const hasChild = !!(pnode.children && pnode.children.length);
+            pnode.isParent = hasChild;
+            pnode.open = hasChild && pnode.open;
             treeObj.updateNode(pnode);
             this.selectNode(pnode.id);
         },
@@ -211,6 +241,21 @@ export default {
 </script>
 
 <style>
+/* 高度链：父级定高时 .ztree 成为唯一滚动体（滚动条只在树节点区域）；
+   父级高度 auto（如卡片内按内容展开的树）时 height:100% 退化为 auto，表现为按内容展开，不受影响 */
+.my-tree {
+    height: 100%;
+    display: flex;
+    flex-direction: column;
+    min-height: 0;
+}
+
+.my-tree > .ztree {
+    flex: 1;
+    min-height: 0;
+    overflow-y: auto;
+}
+
 .ztree-search-highlight {
     background-color: #ff6600 !important;
 }
diff --git a/src/views/GroupAuth.vue b/src/views/GroupAuth.vue
index 8c30156..3cedc41 100644
--- a/src/views/GroupAuth.vue
+++ b/src/views/GroupAuth.vue
@@ -107,6 +107,7 @@ type AuthzTreeNode = {
     nodeType: "app" | "module";
     rawId: number;
     appId: number;
+    isParent?: boolean;
     children?: AuthzTreeNode[];
 };
 
@@ -230,8 +231,10 @@ function isModuleAllInherit(node: AppModuleVo): boolean {
     return (node.children || []).every((c) => isModuleAllInherit(c));
 }
 
+// 空 children 不挂键：zTree 只要见到 children 是数组就强制 isParent=true 而渲染 +/−（叶子也会出现展开图标）
 function buildModuleNode(m: AppModuleVo, appId: number): AuthzTreeNode {
-    return {
+    const kids = (m.children || []).map((c) => buildModuleNode(c, appId));
+    const node: AuthzTreeNode = {
         id: `mod_${m.id}`,
         name: String(m.name || ""),
         open: true,
@@ -240,13 +243,16 @@ function buildModuleNode(m: AppModuleVo, appId: number): AuthzTreeNode {
         nodeType: "module",
         rawId: Number(m.id),
         appId,
-        children: (m.children || []).map((c) => buildModuleNode(c, appId)),
+        isParent: kids.length > 0,
     };
+    if (kids.length > 0) node.children = kids;
+    return node;
 }
 
 function buildAppNode(app: AppItem): AuthzTreeNode {
     const appId = Number(app.id);
-    return {
+    const kids = (app.modules || []).map((m) => buildModuleNode(m, appId));
+    const node: AuthzTreeNode = {
         id: `app_${appId}`,
         name: String(app.name || ""),
         open: false, // 一级默认闭合，点击才展开模块
@@ -255,8 +261,10 @@ function buildAppNode(app: AppItem): AuthzTreeNode {
         nodeType: "app",
         rawId: appId,
         appId,
-        children: (app.modules || []).map((m) => buildModuleNode(m, appId)),
+        isParent: kids.length > 0,
     };
+    if (kids.length > 0) node.children = kids;
+    return node;
 }
 
 // 分类 -> zTree 数据（应用为一级节点，模块为子节点）；weight 用于三列均衡
diff --git a/src/views/PermissionView.vue b/src/views/PermissionView.vue
index a8688eb..2083cea 100644
--- a/src/views/PermissionView.vue
+++ b/src/views/PermissionView.vue
@@ -1,6 +1,6 @@
 <template>
-    <div class="main-wrapper tree-wrapper">
-        <div class="tree-container">
+    <div class="main-wrapper tree-wrapper permission-view">
+        <div class="tree-container permission-tree">
             <Input v-model="userKeyword" placeholder="输入用户，回车查找" suffix="ios-search" search clearable
                 class="search-input" @on-search="onSearchUser" @on-clear="onClearUser" />
             <GroupTreeSearchPanel ref="groupTreeRef" :treeApi="fetchGroupTree" :autoClick="true"
@@ -389,19 +389,21 @@ function formatRoleAuthzTree(apps: any[], appListRes: any, typeRes: any): any[]
     });
 }
 
+// zTree 的父节点判定是「children 是数组即 isParent=true」——空数组也会渲染出 +/− 展开图标，
+// 因此统一约定：有子节点才挂 children 键，否则不挂（与组用户管理左侧树的构造口径一致）
+function treeNode(base: Record<string, any>, kids: any[]): any {
+    const node: any = { ...base, isParent: kids.length > 0 };
+    if (kids.length > 0) node.children = kids;
+    return node;
+}
+
 // 仅保留勾选(checked)的模块；父未勾选但子孙有勾选时保留父节点以维持层级
 function filterCheckedModules(nodes: any[]): any[] {
     const out: any[] = [];
     for (const n of nodes || []) {
-        const children = filterCheckedModules(n.children || []);
-        if (n.checked || children.length > 0) {
-            out.push({
-                id: `mod_${n.id}`,
-                name: n.name || `模块${n.id}`,
-                open: true,
-                children,
-                isParent: (n.children || []).length > 0,
-            });
+        const kids = filterCheckedModules(n.children || []);
+        if (n.checked || kids.length > 0) {
+            out.push(treeNode({ id: `mod_${n.id}`, name: n.name || `模块${n.id}`, open: true }, kids));
         }
     }
     return out;
@@ -409,13 +411,12 @@ function filterCheckedModules(nodes: any[]): any[] {
 
 // 所属部门：祖先链树，用户直接归属的组加「本组」标记
 function formatDeptTree(nodes: GroupNode[]): any[] {
-    return (nodes || []).map((n) => ({
-        id: `grp_${n.id}`,
-        name: n.own ? `${n.name || ""}（本组）` : n.name || "",
-        open: true,
-        children: formatDeptTree(n.children || []),
-        isParent: (n.children || []).length > 0,
-    }));
+    return (nodes || []).map((n) =>
+        treeNode(
+            { id: `grp_${n.id}`, name: n.own ? `${n.name || ""}（本组）` : n.name || "", open: true },
+            formatDeptTree(n.children || [])
+        )
+    );
 }
 
 // 所属角色：2 级树 —— 一级为「平台角色」(全应用) / 应用名分组，二级为角色
@@ -438,40 +439,30 @@ function formatRoleTree(roles: RoleItem[]): any[] {
 }
 
 function formatPermissionTree(categories: CategoryNode[]): any[] {
-    const result: any[] = [];
-    for (const cat of categories) {
-        const catNode: any = {
-            id: `cat_${cat.id}`,
-            name: cat.name || `应用类型${cat.id}`,
-            open: true,
-            children: formatApps(cat.apps || [], cat.id),
-        };
-        catNode.isParent = catNode.children.length > 0;
-        result.push(catNode);
-    }
-    return result;
+    return (categories || []).map((cat) =>
+        treeNode(
+            { id: `cat_${cat.id}`, name: cat.name || `应用类型${cat.id}`, open: true },
+            formatApps(cat.apps || [], cat.id)
+        )
+    );
 }
 
 function formatApps(apps: AppNode[], catId?: number): any[] {
-    return (apps || []).map((app) => ({
-        id: `app_${app.id}_${catId || 0}`,
-        name: app.name || `应用${app.id}`,
-        open: false, // 应用一级默认闭合，点击才展开模块
-        children: formatModules(app.modules || []),
-    }));
+    return (apps || []).map((app) =>
+        treeNode(
+            { id: `app_${app.id}_${catId || 0}`, name: app.name || `应用${app.id}`, open: false }, // 应用一级默认闭合，点击才展开模块
+            formatModules(app.modules || [])
+        )
+    );
 }
 
 function formatModules(modules: ModuleNode[]): any[] {
-    return (modules || []).map((m) => {
-        const children = formatModules(m.children || []);
-        return {
-            id: `mod_${m.id}`,
-            name: m.name || `模块${m.id}`,
-            open: true,
-            children,
-            isParent: children.length > 0,
-        };
-    });
+    return (modules || []).map((m) =>
+        treeNode(
+            { id: `mod_${m.id}`, name: m.name || `模块${m.id}`, open: true },
+            formatModules(m.children || [])
+        )
+    );
 }
 </script>
 
@@ -635,19 +626,29 @@ function formatModules(modules: ModuleNode[]): any[] {
     color: #2d8cf0;
 }
 
-:deep(.group-tree-search-panel) {
-    height: 100%;
-}
-
 :deep(.ztree) {
     font-size: 14px;
 
-    li {
-        line-height: 26px;
-    }
-
     a {
         color: #333;
     }
 }
 </style>
+
+<style lang="scss">
+/* 左列对齐「组用户管理」页的写法（不覆盖全局 .tree-container）：
+   容器改 flex 纵向并收起自身滚动，把滚动条收敛到树节点区域，避免整列滚动把搜索框滚走、树尾被裁。
+   注意不要在此处覆盖 zTree 的行高：zTree 官方样式的图标/连线按 21px 节距排布，
+   把 li line-height 改大（如 26px）会让每行多出的空隙在连接线上露出断口。 */
+.tree-wrapper.permission-view .tree-container.permission-tree {
+    display: flex;
+    flex-direction: column;
+    height: 100%;
+    overflow: hidden;
+
+    .group-tree-search-panel {
+        flex: 1;
+        min-height: 0;
+    }
+}
+</style>
diff --git a/src/views/group-user/index.vue b/src/views/group-user/index.vue
index a1bd411..ecb3f41 100644
--- a/src/views/group-user/index.vue
+++ b/src/views/group-user/index.vue
@@ -371,7 +371,8 @@ function onSortSaved() {
     left: 348px !important;
 }
 
-/* 左侧树容器改为 flex 纵向布局并收起自身滚动，把滚动条收敛到树节点区域(.ztree 自带 overflow-y:auto)，
+/* 左侧树容器改为 flex 纵向布局并收起自身滚动，把滚动条收敛到树节点区域
+   （滚动体是 MyTree 内部的 .ztree，见 components/MyTree.vue），
    避免树过长时把顶部 opera-ul 操作按钮条滚出屏幕；仅作用于本页，不影响全局 .tree-container */
 .tree-wrapper.group-user-page .tree-container.group-user-tree {
     display: flex;
diff --git a/src/views/role-authz/AppModuleCheckTree.vue b/src/views/role-authz/AppModuleCheckTree.vue
index c70041a..885be3b 100644
--- a/src/views/role-authz/AppModuleCheckTree.vue
+++ b/src/views/role-authz/AppModuleCheckTree.vue
@@ -68,6 +68,7 @@ type AuthzTreeNode = {
     nodeType: "app" | "module";
     rawId: number;
     appId: number;
+    isParent?: boolean;
     children?: AuthzTreeNode[];
 };
 type CategoryTreeItem = { cat: CategoryItem; treeData: AuthzTreeNode[]; weight: number };
@@ -115,8 +116,10 @@ function isModuleAllChecked(node: AppModuleVo): boolean {
     if (!node.checked) return false;
     return (node.children || []).every((c) => isModuleAllChecked(c));
 }
+// 空 children 不挂键：zTree 只要见到 children 是数组就强制 isParent=true 而渲染 +/−（叶子也会出现展开图标）
 function buildModuleNode(m: AppModuleVo, appId: number): AuthzTreeNode {
-    return {
+    const kids = (m.children || []).map((c) => buildModuleNode(c, appId));
+    const node: AuthzTreeNode = {
         id: `mod_${m.id}`,
         name: String(m.name || ""),
         open: true,
@@ -124,21 +127,26 @@ function buildModuleNode(m: AppModuleVo, appId: number): AuthzTreeNode {
         nodeType: "module",
         rawId: Number(m.id),
         appId,
-        children: (m.children || []).map((c) => buildModuleNode(c, appId)),
+        isParent: kids.length > 0,
     };
+    if (kids.length > 0) node.children = kids;
+    return node;
 }
 function buildAppNode(app: AppItem): AuthzTreeNode {
     const appId = Number(app.id);
-    return {
+    const kids = (app.modules || []).map((m) => buildModuleNode(m, appId));
+    const node: AuthzTreeNode = {
         id: `app_${appId}`,
         name: String(app.name || ""),
-        open: false, // 一级默认闭合，点击才展开模块
+        open: false,
         checked: isAppChecked(app),
         nodeType: "app",
         rawId: appId,
         appId,
-        children: (app.modules || []).map((m) => buildModuleNode(m, appId)),
+        isParent: kids.length > 0,
     };
+    if (kids.length > 0) node.children = kids;
+    return node;
 }
 
 // ---------------- 数据加载 ----------------