修改页面，完成单页模式新增首页返回上一页按钮

public/js/memo-pages.js

@@ -308,9 +308,7 @@
   function redirectUnauthorized(api, error) {
     if (!shouldRedirectToLogin(api, error)) return false;
     if (api && api.clearToken) api.clearToken();
-    if (!root.location) return true;
-    if (typeof root.location.replace === 'function') root.location.replace('login.html');
-    else root.location.href = 'login.html';
+    root.NavigationUtil.open('login.html');
     return true;
   }
 
@@ -597,7 +595,7 @@
       if (!savedId) throw new Error('保存响应缺少 memoId');
       verifiedDetail = await api.memoDetail(genealogyId, savedId);
       if (!matchesSavedMemo(verifiedDetail, savedId)) throw new Error('保存后重读未返回同一条备忘录');
-      if (root.location) root.location.href = buildListUrl(genealogyId, savedId);
+      root.NavigationUtil.open(buildListUrl(genealogyId, savedId));
     } catch (error) {
       if (redirectUnauthorized(api, error)) return;
       setFormStatus(