fix: admin login overlay and version footer

TaxBaik.Web/Components/Admin/Layout/MainLayout.razor

@@ -1,6 +1,7 @@
 @inherits LayoutComponentBase
 @inject NavigationManager Navigation
 @inject IJSRuntime JS
+@inject VersionInfo VersionInfo
 @implements IDisposable
 @rendermode @(new InteractiveWebAssemblyRenderMode(prerender: false))
 
@@ -88,6 +89,12 @@
             <MudNavLink Href="/taxbaik/admin/inquiries" Icon="@Icons.Material.Filled.Forum">문의 관리</MudNavLink>
             <MudNavLink Href="/taxbaik/admin/settings" Icon="@Icons.Material.Filled.Tune">설정</MudNavLink>
         </MudNavMenu>
+
+        <div class="admin-drawer-version">
+            <div class="admin-drawer-version-label">Version</div>
+            <div class="admin-drawer-version-value">v@(VersionInfo.Version)</div>
+            <div class="admin-drawer-version-built">@VersionInfo.Built</div>
+        </div>
     </MudDrawer>
 
     <MudMainContent Class="admin-main">

TaxBaik.Web/wwwroot/css/admin.css

@@ -572,6 +572,33 @@ textarea:focus-visible {
   color: var(--text-tertiary);
 }
 
+.admin-drawer-version {
+  margin-top: auto;
+  padding: var(--space-4);
+  border-top: 1px solid var(--border-color-light);
+  font-size: 0.72rem;
+  color: var(--text-tertiary);
+  line-height: 1.35;
+}
+
+.admin-drawer-version-label {
+  text-transform: uppercase;
+  letter-spacing: 0.08em;
+  margin-bottom: 4px;
+  color: var(--text-secondary);
+  font-weight: var(--font-weight-semibold);
+}
+
+.admin-drawer-version-value {
+  font-weight: var(--font-weight-semibold);
+  color: var(--text-primary);
+}
+
+.admin-drawer-version-built {
+  margin-top: 2px;
+  word-break: break-word;
+}
+
 .admin-main {
   flex: 1;
   overflow-y: auto;

TaxBaik.Web/wwwroot/js/admin-session.js

@@ -21,6 +21,11 @@ window.taxbaikAdminSession = {
     },
 
     showLoading: function () {
+        if (document.documentElement.classList.contains('admin-login-route')) {
+            window.taxbaikAdminSession.hideLoading();
+            return;
+        }
+
         const overlay = document.getElementById('blazor-loading');
         if (!overlay) return;
 
@@ -84,6 +89,10 @@ window.taxbaikAdminSession = {
         window.taxbaikAdminSession.syncRouteClass();
         window.addEventListener('popstate', window.taxbaikAdminSession.syncRouteClass);
 
+        if (document.documentElement.classList.contains('admin-login-route')) {
+            window.taxbaikAdminSession.hideLoading();
+        }
+
         // Show loading on initial page load — overlay has 'show' from HTML,
         // but we still need to set up the observer to detect when to hide it.
         window.taxbaikAdminSession.showLoading();