Refactor API clients to use primary constructor for HttpClient

Refactored CatalogApiClient, DashboardApiClient, LayoutApiClient, and MassDataApiClient to use C# primary constructor syntax for injecting HttpClient. Removed private _httpClient fields and updated all usages to reference the constructor parameter directly. This change simplifies the code and modernizes dependency injection without altering any API logic.

DbFirst.BlazorWebApp/Services/DashboardApiClient.cs

@@ -2,19 +2,13 @@ using DbFirst.Contracts.Dashboards;
 
 namespace DbFirst.BlazorWebApp.Services;
 
-public class DashboardApiClient : IDashboardApiClient
+public class DashboardApiClient(HttpClient httpClient) : IDashboardApiClient
 {
-    private readonly HttpClient _httpClient;
     private const string Endpoint = "api/dashboard/dashboards";
 
-    public DashboardApiClient(HttpClient httpClient)
-    {
-        _httpClient = httpClient;
-    }
-
     public async Task<List<DashboardInfoDto>> GetAllAsync(CancellationToken ct = default)
     {
-        var result = await _httpClient.GetFromJsonAsync<List<DashboardInfoDto>>(Endpoint, ct);
+        var result = await httpClient.GetFromJsonAsync<List<DashboardInfoDto>>(Endpoint, ct);
         return result ?? [];
     }
 }