feat: clientarea 布局重构 — 顶栏全宽独占一行

HTML 结构变更 (20个PHP文件):
- 旧: el-container > [aside-menu, el-container > [top-menu, el-main]]
- 新: el-container[direction=vertical] > [top-menu, el-container > [aside-menu, el-main]]

CSS 适配:
- el-header: sticky top:0, z-index:100, width:100%
- el-aside: height calc(100vh-60px), sticky top:60px

clientarea/hgcloud/productList.php

@@ -13,10 +13,10 @@
         <div class="ddr ddr5"></div>
     </div>
     <div class="product">
-        <el-container>
-            <aside-menu></aside-menu>
+        <el-container direction="vertical">
+            <top-menu></top-menu>
             <el-container>
-                <top-menu></top-menu>
+                <aside-menu></aside-menu>
                 <el-main>
                     <div class="main-card">
                         <div class="main-card-title">