feat: standalone Blazor WebAssembly admin + SEO enhancements

Architecture:
- Admin UI: /admin (Standalone Blazor WebAssembly, 219 WASM files)
- Portal: /portal (Razor Pages, Cookie/OAuth auth)
- Homepage: / (Razor Pages, SSR)
- API: /api (FastEndpoints + JWT)

SEO:
- Sitemap: Public content only (blog, FAQ, announcements, contact)
- robots.txt: Exclude /admin and /portal, reference production domain
- Naver verification: naverb1813cd79ddc2ded5c5291fca5cb46c2.html ready

Technical:
- TaxBaik.Web.Client: StaticWebAssetBasePath=admin
- Server Program.cs: UseBlazorFrameworkFiles + MapFallback for SPA routing
- base href="/admin/" for client-side navigation
- blazor.webassembly.js (standalone, not web.js)

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

src/TaxBaik.Web/Program.cs

@@ -20,9 +20,7 @@ using TaxBaik.Application.Seasonal;
 using TaxBaik.Application.Utils;
 using TaxBaik.Infrastructure;
 using TaxBaik.Web.Services;
-using TaxBaik.Web.Components.Admin.Services;
-using TaxBaik.Web.Components.Admin.Services.AdminClients;
-using TaxBaik.Web.Components.Admin.Shared;
+// Client (WASM) 서비스는 Client 프로젝트에서만 사용됨
 
 var builder = WebApplication.CreateBuilder(args);
 var isProduction = builder.Environment.IsProduction();
@@ -90,14 +88,10 @@ builder.Services.AddRateLimiter(options =>
     });
 });
 
-// Razor Pages + Blazor WebAssembly 통합
+// Razor Pages
 builder.Services.AddRazorPages();
-builder.Services.AddRazorComponents()
-    .AddInteractiveWebAssemblyComponents();
-builder.Services.Configure<Microsoft.AspNetCore.Components.Server.CircuitOptions>(options =>
-{
-    options.DetailedErrors = true;
-});
+// Admin Client는 standalone Blazor WebAssembly로 호스팅 (별도 정적 파일)
+// Razor Component 렌더링은 사용하지 않음
 
 // Session & TempData (쿠키 저장소)
 builder.Services.AddSession(options =>
@@ -282,35 +276,7 @@ builder.Services.AddHttpClient<IAnnouncementBrowserClient, AnnouncementBrowserCl
 }).AddHttpMessageHandler<TokenRefreshHandler>();
 
 // Phase 5: Tax Accounting & CRM Browser Clients
-builder.Services.AddHttpClient<ITaxProfileBrowserClient, TaxProfileBrowserClient>(client =>
-{
-    client.BaseAddress = new Uri(apiBaseUrl);
-}).AddHttpMessageHandler<TokenRefreshHandler>();
-
-builder.Services.AddHttpClient<ITaxFilingScheduleBrowserClient, TaxFilingScheduleBrowserClient>(client =>
-{
-    client.BaseAddress = new Uri(apiBaseUrl);
-}).AddHttpMessageHandler<TokenRefreshHandler>();
-
-builder.Services.AddHttpClient<IConsultingActivityBrowserClient, ConsultingActivityBrowserClient>(client =>
-{
-    client.BaseAddress = new Uri(apiBaseUrl);
-}).AddHttpMessageHandler<TokenRefreshHandler>();
-
-builder.Services.AddHttpClient<IContractBrowserClient, ContractBrowserClient>(client =>
-{
-    client.BaseAddress = new Uri(apiBaseUrl);
-}).AddHttpMessageHandler<TokenRefreshHandler>();
-
-builder.Services.AddHttpClient<IRevenueTrackingBrowserClient, RevenueTrackingBrowserClient>(client =>
-{
-    client.BaseAddress = new Uri(apiBaseUrl);
-}).AddHttpMessageHandler<TokenRefreshHandler>();
-
-builder.Services.AddHttpClient<ICommonCodeBrowserClient, CommonCodeBrowserClient>(client =>
-{
-    client.BaseAddress = new Uri(apiBaseUrl);
-}).AddHttpMessageHandler<TokenRefreshHandler>();
+// (등록은 Client 프로젝트에서만 필요 - Server는 API만 제공)
 
 // UI & 캐시 (MudBlazor Theme Customization)
 builder.Services.AddMudServices(config =>
@@ -412,23 +378,19 @@ if (!app.Environment.IsDevelopment())
     app.UseHsts();
 }
 
-// API + Razor Pages + Blazor 매핑
+// API + Razor Pages + 정적 파일 매핑
 app.MapControllers();
 app.MapFastEndpoints();
 app.MapHealthChecks("/healthz");
 app.MapRazorPages();
 app.MapStaticAssets();
 
-// AllowAnonymous: JWT 미들웨어가 Blazor 셸 요청을 401로 차단하지 않도록 한다.
-// 인증은 Blazor AuthorizeRouteView → RedirectToLogin 에서 처리한다.
-// Phase 8: WebAssembly 렌더 모드 완전 마이그레이션
-// - App.razor: TaxBaik.Web (메인 웹 서버)
-// - Routes + Pages + Shared + Layout + Forms: TaxBaik.Web (메인 웹 서버)
-// 모든 Blazor 컴포넌트가 웹 서버에서 통합 서비스됨
-// API는 웹 서버에서만 제공 (클라이언트 프로젝트 분리 불필요)
-app.MapRazorComponents<TaxBaik.Web.Components.Admin.App>()
-   .AddInteractiveServerRenderMode()
-   .AllowAnonymous();
+// Admin Blazor WebAssembly SPA 호스팅 (/admin)
+app.UseBlazorFrameworkFiles("/admin");
+app.UseStaticFiles("/admin");
+
+// /admin 라우팅 폴백 (SPA 라우트 처리)
+app.MapFallbackToFile("admin/{*path:nonfile}", "admin/index.html");
 
 // 애플리케이션 시작/종료 로깅
 try