Simplify HTTP client management

DiscordChatExporter.Core/Discord/DiscordClient.cs

@@ -16,21 +16,10 @@ namespace DiscordChatExporter.Core.Discord
 {
     public class DiscordClient
     {
-        private readonly HttpClient _httpClient;
         private readonly AuthToken _token;
-
         private readonly Uri _baseUri = new("https://discord.com/api/v8/", UriKind.Absolute);
 
-        public DiscordClient(HttpClient httpClient, AuthToken token)
-        {
-            _httpClient = httpClient;
-            _token = token;
-        }
-
-        public DiscordClient(AuthToken token)
-            : this(Http.Client, token)
-        {
-        }
+        public DiscordClient(AuthToken token) => _token = token;
 
         private async ValueTask<HttpResponseMessage> GetResponseAsync(string url) =>
             await Http.ResponsePolicy.ExecuteAsync(async () =>
@@ -38,7 +27,7 @@ namespace DiscordChatExporter.Core.Discord
                 using var request = new HttpRequestMessage(HttpMethod.Get, new Uri(_baseUri, url));
                 request.Headers.Authorization = _token.GetAuthenticationHeader();
 
-                return await _httpClient.SendAsync(request, HttpCompletionOption.ResponseHeadersRead);
+                return await Http.Client.SendAsync(request, HttpCompletionOption.ResponseHeadersRead);
             });
 
         private async ValueTask<JsonElement> GetJsonResponseAsync(string url)

DiscordChatExporter.Core/Exporting/MediaDownloader.cs

@@ -2,7 +2,6 @@
 using System.Collections.Generic;
 using System.Globalization;
 using System.IO;
-using System.Net.Http;
 using System.Security.Cryptography;
 using System.Text;
 using System.Text.RegularExpressions;
@@ -14,23 +13,18 @@ namespace DiscordChatExporter.Core.Exporting
 {
     internal partial class MediaDownloader
     {
-        private readonly HttpClient _httpClient;
         private readonly string _workingDirPath;
         private readonly bool _reuseMedia;
 
-        // URL -> Local file path
+        // File paths of already downloaded media
         private readonly Dictionary<string, string> _pathCache = new(StringComparer.Ordinal);
 
-        public MediaDownloader(HttpClient httpClient, string workingDirPath, bool reuseMedia)
+        public MediaDownloader(string workingDirPath, bool reuseMedia)
         {
-            _httpClient = httpClient;
             _workingDirPath = workingDirPath;
             _reuseMedia = reuseMedia;
         }
 
-        public MediaDownloader(string workingDirPath, bool reuseMedia)
-            : this(Http.Client, workingDirPath, reuseMedia) {}
-
         public async ValueTask<string> DownloadAsync(string url)
         {
             if (_pathCache.TryGetValue(url, out var cachedFilePath))
@@ -49,7 +43,7 @@ namespace DiscordChatExporter.Core.Exporting
             await Http.ExceptionPolicy.ExecuteAsync(async () =>
             {
                 // Download the file
-                using var response = await _httpClient.GetAsync(url);
+                using var response = await Http.Client.GetAsync(url);
                 await using (var output = File.Create(filePath))
                 {
                     await response.Content.CopyToAsync(output);

DiscordChatExporter.Gui/ViewModels/RootViewModel.cs

@@ -94,7 +94,8 @@ namespace DiscordChatExporter.Gui.ViewModels
                     {
                         _updateService.FinalizeUpdate(true);
                         RequestClose();
-                    });
+                    }
+                );
             }
             catch
             {