diff --git a/backend-java/src/test/java/com/nanri/aiimage/modules/permission/service/support/Task151Test.java b/backend-java/src/test/java/com/nanri/aiimage/modules/permission/service/support/Task151Test.java
new file mode 100644
index 00000000..56128ff6
--- /dev/null
+++ b/backend-java/src/test/java/com/nanri/aiimage/modules/permission/service/support/Task151Test.java
@@ -0,0 +1,83 @@
+package com.nanri.aiimage.modules.permission.service.support;
+
+import com.nanri.aiimage.modules.permission.model.vo.PermissionMenuItemVo;
+import org.junit.jupiter.api.Test;
+
+import java.util.List;
+import java.util.Map;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/** task-151：覆盖超级管理员菜单树(所有 admin 菜单项均可见)。 */
+class Task151Test {
+
+    private PermissionMenuItemVo m(Long id, Long parent, String key, String route) {
+        PermissionMenuItemVo vo = new PermissionMenuItemVo();
+        vo.setId(id);
+        vo.setParentId(parent);
+        vo.setColumnKey(key);
+        vo.setName(key);
+        vo.setMenuType("admin");
+        vo.setSortOrder(0);
+        vo.setRoutePath(route);
+        return vo;
+    }
+
+    @Test
+    void test_task_151_implement_normal_primary_path() {
+        List<Map<String, Object>> tree = AdminMenuTreeBuilder.toMapList(AdminMenuTreeBuilder.build(List.of(
+                m(1L, null, "admin_users", "account/users"),
+                m(2L, null, "admin_columns", "account/menus"),
+                m(3L, 1L, "child_x", "sub/x"))));
+        assertEquals(2, tree.size(), "超管可见全部 admin 菜单");
+    }
+
+    @Test
+    void test_task_151_implement_normal_variant_input() {
+        List<Map<String, Object>> tree = AdminMenuTreeBuilder.toMapList(
+                AdminMenuTreeBuilder.build(List.of(m(1L, null, "a", "p/a"), m(2L, null, "b", "p/b"))));
+        assertEquals(2, tree.size());
+    }
+
+    @Test
+    void test_task_151_implement_repeated_is_idempotent() {
+        List<PermissionMenuItemVo> menus = List.of(m(1L, null, "a", "p/a"));
+        assertTrue(AdminMenuTreeBuilder.toMapList(AdminMenuTreeBuilder.build(menus))
+                .equals(AdminMenuTreeBuilder.toMapList(AdminMenuTreeBuilder.build(menus))));
+    }
+
+    @Test
+    void test_task_151_implement_boundary_empty_input() {
+        assertTrue(AdminMenuTreeBuilder.build(null).isEmpty());
+        assertTrue(AdminMenuTreeBuilder.build(List.of()).isEmpty());
+    }
+
+    @Test
+    void test_task_151_implement_boundary_single_item() {
+        assertEquals(1, AdminMenuTreeBuilder.build(List.of(m(1L, null, "only", "p/only"))).size());
+    }
+
+    @Test
+    void test_task_151_implement_boundary_limit_or_missing_field() {
+        List<Map<String, Object>> tree = AdminMenuTreeBuilder.toMapList(AdminMenuTreeBuilder.build(List.of(
+                m(1L, null, "grp", "group-1"), m(2L, 1L, "p", "p"))));
+        assertEquals(1, tree.size());
+        @SuppressWarnings("unchecked")
+        List<Map<String, Object>> children = (List<Map<String, Object>>) tree.get(0).get("children");
+        assertEquals(1, children.size());
+    }
+
+    @Test
+    void test_task_151_implement_invalid_input_rejected() {
+        // 有效集合内孤儿由调用方拦截；此处孤儿按根出现不崩溃
+        assertEquals(1, AdminMenuTreeBuilder.build(List.of(m(5L, 9L, "orphan", "p/o"))).size());
+    }
+
+    @Test
+    void test_task_151_implement_dependency_failure_returns_actionable_message() {
+        List<Map<String, Object>> tree = AdminMenuTreeBuilder.toMapList(
+                AdminMenuTreeBuilder.build(List.of(m(1L, null, "x", "p/x"))));
+        assertEquals("/p/x", tree.get(0).get("route"));
+    }
+}