fix: remove Portal MapRazorComponents registration (not implemented)

Keep only Admin WASM client registration with correct namespace:
- TaxBaik.WasmClient.Components.Admin.App
- TaxBaik.WasmClient._Imports

Remove Portal client registration since Portal.Client is not configured
for WASM rendering.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

src/TaxBaik.Web/Program.cs

@@ -393,15 +393,9 @@ app.MapRazorPages();  // Sitemap.cshtml, Rss.cshtml, Feed.cshtml
 app.MapStaticAssets();
 
 // Blazor WebAssembly Admin Client
-app.MapRazorComponents<TaxBaik.Web.Client.Components.Admin.App>()
+app.MapRazorComponents<TaxBaik.WasmClient.Components.Admin.App>()
    .AddInteractiveWebAssemblyRenderMode()
-   .AddAdditionalAssemblies(typeof(TaxBaik.Web.Client._Imports).Assembly)
+   .AddAdditionalAssemblies(typeof(TaxBaik.WasmClient._Imports).Assembly)
-   .AllowAnonymous();
-
-// Portal WASM Client
-app.MapRazorComponents<TaxBaik.Portal.Client.Components.App>()
-   .AddInteractiveWebAssemblyRenderMode()
-   .AddAdditionalAssemblies(typeof(TaxBaik.Portal.Client._Imports).Assembly)
    .AllowAnonymous();
 
 // SPA 라우팅 폴백 (가장 마지막에!)
@@ -426,3 +420,4 @@ finally
     Log.Information("애플리케이션 종료");
     Log.CloseAndFlush();
 }
+