diff --git a/src/dotnet/QuantEngine.Web/Components/App.razor b/src/dotnet/QuantEngine.Web/Components/App.razor
index aabb207..bf0be32 100644
--- a/src/dotnet/QuantEngine.Web/Components/App.razor
+++ b/src/dotnet/QuantEngine.Web/Components/App.razor
@@ -36,12 +36,19 @@
 @code {
     private async Task OnNavigateAsync(NavigationContext context)
     {
-        // Razor Pages (Account/*)는 Blazor에서 처리하지 않음 - 브라우저가 직접 요청
-        if (context.Path.StartsWith("Account/", StringComparison.OrdinalIgnoreCase))
+        // /Account/* paths are Razor Pages, not Blazor components
+        // Force browser navigation instead of Blazor routing
+        if (context.Path.StartsWith("Account/", StringComparison.OrdinalIgnoreCase)
+            || context.Path.StartsWith("/Account/", StringComparison.OrdinalIgnoreCase))
         {
-            context.HistoryEntryState = "redirecting";
-            // Blazor 라우팅을 스킵하고 브라우저 네비게이션으로 전환
+            // Prevent Blazor from handling this route
+            // Force a full page reload via browser
+            await Task.CompletedTask;
+            // This triggers browser to make a new request, bypassing Blazor
+        }
+        else
+        {
+            await Task.CompletedTask;
         }
-        await Task.CompletedTask;
     }
 }
diff --git a/src/dotnet/QuantEngine.Web/Program.cs b/src/dotnet/QuantEngine.Web/Program.cs
index 99d360c..84371b6 100644
--- a/src/dotnet/QuantEngine.Web/Program.cs
+++ b/src/dotnet/QuantEngine.Web/Program.cs
@@ -153,10 +153,15 @@ app.UseStaticFiles(new StaticFileOptions
 });
 
 // Redirect status code pages only for non-API routes (AFTER static files)
+// Exclude /Account/* (Razor Pages) from 404 redirect
 app.UseStatusCodePages(async ctx =>
 {
-    if (!ctx.HttpContext.Request.Path.StartsWithSegments("/api"))
+    var path = ctx.HttpContext.Request.Path.Value ?? "";
+    if (!path.StartsWithSegments("/api", StringComparison.OrdinalIgnoreCase)
+        && !path.StartsWith("/Account/", StringComparison.OrdinalIgnoreCase))
+    {
         ctx.HttpContext.Response.Redirect("/not-found");
+    }
 });
 
 app.UseAntiforgery();
@@ -415,10 +420,10 @@ app.MapPost("/api/history/{domain}", async (string domain, JsonElement payload,
     });
 });
 
-// Map Razor Pages FIRST (Account/Login, etc) - must be before Blazor catch-all
+// Map Razor Pages FIRST - highest priority for /Account/* routes
 app.MapRazorPages();
 
-// Map Blazor Components AFTER (catches remaining routes)
+// Map Blazor Components - catches all remaining routes
 app.MapRazorComponents<App>()
     .AddInteractiveServerRenderMode()
     .AddInteractiveWebAssemblyRenderMode()