Fix admin routing and Playwright smoke checks

src/TaxBaik.Web/Program.cs

@@ -395,12 +395,9 @@ app.MapHealthChecks("/healthz");
 app.MapRazorPages();  // Sitemap.cshtml, Rss.cshtml, Feed.cshtml
 app.MapStaticAssets();
 
-// Blazor WebAssembly - prerender: false 페이지 지원
-// 대시보드 등은 prerender: false이므로 MapRazorComponents 필수
-// AddAdditionalAssemblies: WASM 클라이언트의 모든 컴포넌트 명시적 등록 (필수!)
+// Blazor WebAssembly - prerender 지원
 app.MapRazorComponents<TaxBaik.WasmClient.Components.Admin.App>()
    .AddInteractiveWebAssemblyRenderMode()
-   .AddAdditionalAssemblies(typeof(TaxBaik.WasmClient.Components.Admin._Imports).Assembly)
    .AllowAnonymous();
 
 // SPA 라우팅 폴백