feat(admin): stabilize blog and admin patterns

TaxBaik.Web/Components/Admin/App.razor

@@ -11,11 +11,6 @@
     <link href="https://fonts.googleapis.com/css2?family=Noto+Sans+KR:wght@400;500;700&display=swap" rel="stylesheet" />
     <link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet" />
     <link href="_content/MudBlazor/MudBlazor.min.css" rel="stylesheet" />
-    <!-- EasyMDE 마크다운 에디터 -->
-    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/easymde@2.18.0/dist/easymde.min.css" />
-    <script src="https://cdn.jsdelivr.net/npm/easymde@2.18.0/dist/easymde.min.js"></script>
-    <!-- Marked 라이브러리 (EasyMDE 미리보기용) -->
-    <script src="https://cdn.jsdelivr.net/npm/marked@11.1.1/marked.min.js"></script>
     <script>
         document.documentElement.classList.toggle(
             'admin-login-route',
@@ -32,7 +27,7 @@
             <span style="font-size: 0.85rem; margin-top: 0.5rem; opacity: 0.8;">자동으로 페이지를 새로고침합니다. 잠시만 기다려주세요.</span>
         </div>
     </div>
-    <div id="blazor-loading" class="blazor-loading-overlay show">
+    <div id="blazor-loading" class="blazor-loading-overlay">
         <div class="blazor-loading-spinner">
             <div class="spinner"></div>
             <p>로드 중...</p>