fix(routing): static Routes, InteractiveAuto HeadOutlet, drop DefaultLayout

Routes needs no render mode — layouts declare the interactive mode.
MainLayout (WASM) and CmsLayout (Server) are top-level islands with no
conflicting parent render mode. DefaultLayout removed so AuthBlocks auth
pages render self-contained without being forced into the WASM layout.

DeepDrftWeb/Components/Routes.razor

@@ -1,7 +1,7 @@
 <Router AppAssembly="typeof(App).Assembly"
         AdditionalAssemblies="new[] { typeof(DeepDrftWeb.Client._Imports).Assembly, typeof(DeepDrftCms._Imports).Assembly, typeof(AuthBlocksWeb._Imports).Assembly }">
     <Found Context="routeData">
-        <AuthorizeRouteView RouteData="routeData" DefaultLayout="typeof(DeepDrftWeb.Client.Layout.MainLayout)">
+        <AuthorizeRouteView RouteData="routeData">
             <NotAuthorized>
                 @{
                     NavigationManager.NavigateTo($"account/login?returnUrl={Uri.EscapeDataString(NavigationManager.Uri)}", forceLoad: true);
@@ -12,9 +12,7 @@
     </Found>
     <NotFound>
         <PageTitle>Not found</PageTitle>
-        <LayoutView Layout="typeof(DeepDrftWeb.Client.Layout.MainLayout)">
-            <p role="alert">Sorry, there's nothing at this address.</p>
-        </LayoutView>
+        <p role="alert">Sorry, there's nothing at this address.</p>
     </NotFound>
 </Router>