fix: ApiClient 의존성 주입 등록 및 using 추가

Program.cs:
- using QuantEngine.Web.Services 추가
- builder.Services.AddHttpClient<ApiClient>();
- builder.Services.AddScoped<ApiClient>();

Collection.razor에서 ApiClient 주입 가능하도록 함

src/dotnet/QuantEngine.Application/obj/Release/net10.0/QuantEngine.Application.GlobalUsings.g.cs

@@ -1,8 +0,0 @@
-// <auto-generated/>
-global using System;
-global using System.Collections.Generic;
-global using System.IO;
-global using System.Linq;
-global using System.Net.Http;
-global using System.Threading;
-global using System.Threading.Tasks;