feat(admin, admin-ui): 实现RuoYi风格后台菜单管理，优化媒体资源处理

新增服务端菜单校验与归一化逻辑，完善菜单相关Schema；前端实现条件渲染的菜单编辑器，支持搜索式图标选择器与父级树过滤。新增媒体URL统一处理工具修复管理端本地静态资源路径映射问题，更新全部相关文档、技术决策记录与测试用例。本次变更不影响WonderQ-MiniAPP端。

WonderQ-Admin/tests/test_admin_rbac.py

@@ -302,6 +302,8 @@ def test_dynamic_menu_tree_preserves_parent_order_and_button_permissions():
     assert DATA_SCOPE_VALUES == {"all", "dept", "dept_and_children", "custom_dept", "self"}
     assert [item["id"] for item in tree] == ["root"]
     assert tree[0]["children"][0]["permission"] == "home:edit"
+    assert tree[0]["isVisible"] is True
+    assert tree[0]["isActive"] is True
 
 
 def test_dynamic_menu_tree_keeps_granted_menu_when_parent_is_not_in_scope():