Refactor admin dashboard and standardize UI shells

src/TaxBaik.Web.Client/Components/Admin/Pages/Companies/CompanyEdit.razor

@@ -9,14 +9,9 @@
 
 <PageTitle>고객사 수정</PageTitle>
 
-<section class="admin-page-hero">
-    <div>
-        <MudText Typo="Typo.caption" Class="admin-eyebrow">Settings</MudText>
-        <MudText Typo="Typo.h4" Class="admin-page-title">고객사 수정</MudText>
-        <MudText Typo="Typo.body2" Class="admin-page-subtitle">고객사 정보를 수정합니다.</MudText>
-    </div>
+<AdminPageHeader Title="고객사 수정" Eyebrow="Settings" Subtitle="고객사 정보를 수정합니다.">
     <MudButton Variant="Variant.Outlined" StartIcon="@Icons.Material.Filled.Close" @onclick="GoBack">취소</MudButton>
-</section>
+</AdminPageHeader>
 
 <AdminEditorPanel Loading="@isLoading" SkeletonContent="@CompanySkeleton">
     @if (formModel == null)