refactor(ui): unify semantic presentation and table hierarchy

src/ZB.MOM.WW.ScadaBridge.CentralUI/Components/Pages/Design/SchemaLibrary.razor

@@ -12,8 +12,8 @@
    — the guard-running ManagementActor path — never a direct repo write. *@
 
 <div class="container-fluid mt-3">
-    <div class="d-flex justify-content-between align-items-center mb-3">
-        <h4 class="mb-0">Schema Library</h4>
+    <div class="page-head justify-content-between">
+        <h1 class="mb-0">Schema Library</h1>
         @if (!_editing)
         {
             <button class="btn btn-primary btn-sm" @onclick="BeginCreate">New Schema</button>
@@ -76,7 +76,8 @@
     }
     else
     {
-        <table class="table table-sm align-middle">
+        <div class="table-responsive" role="region" aria-label="Schema library" tabindex="0">
+<table class="table table-sm align-middle">
             <thead>
                 <tr>
                     <th>Name</th>
@@ -112,6 +113,7 @@
                 }
             </tbody>
         </table>
+</div>
     }
 </div>