cache podcast images and use them on homepage

Jellyfin.Plugin.Jellypod/Services/IPodcastDownloadService.cs

@@ -46,4 +46,13 @@ public interface IPodcastDownloadService
     /// <param name="cancellationToken">Cancellation token.</param>
     /// <returns>Task representing the download operation.</returns>
     Task DownloadPodcastArtworkAsync(Podcast podcast, CancellationToken cancellationToken = default);
+
+    /// <summary>
+    /// Downloads episode artwork.
+    /// </summary>
+    /// <param name="podcast">The podcast.</param>
+    /// <param name="episode">The episode.</param>
+    /// <param name="cancellationToken">Cancellation token.</param>
+    /// <returns>Task representing the download operation.</returns>
+    Task DownloadEpisodeArtworkAsync(Podcast podcast, Episode episode, CancellationToken cancellationToken = default);
 }

Jellyfin.Plugin.Jellypod/Services/PodcastDownloadService.cs

@@ -283,6 +283,46 @@ public sealed class PodcastDownloadService : IPodcastDownloadService, IDisposabl
         }
     }
 
+    /// <inheritdoc />
+    public async Task DownloadEpisodeArtworkAsync(Podcast podcast, Episode episode, CancellationToken cancellationToken = default)
+    {
+        if (string.IsNullOrEmpty(episode.ImageUrl))
+        {
+            return;
+        }
+
+        var config = Plugin.Instance?.Configuration;
+        if (config?.CreatePodcastFolders != true)
+        {
+            return;
+        }
+
+        var basePath = _storageService.GetStoragePath();
+        var podcastFolder = Path.Combine(basePath, SanitizeFileName(podcast.Title));
+        var episodeFileName = $"{SanitizeFileName(episode.Id.ToString())}.jpg";
+        var artworkPath = Path.Combine(podcastFolder, episodeFileName);
+
+        if (File.Exists(artworkPath))
+        {
+            return;
+        }
+
+        try
+        {
+            Directory.CreateDirectory(podcastFolder);
+
+            var httpClient = _httpClientFactory.CreateClient("Jellypod");
+            var imageBytes = await httpClient.GetByteArrayAsync(episode.ImageUrl, cancellationToken).ConfigureAwait(false);
+            await File.WriteAllBytesAsync(artworkPath, imageBytes, cancellationToken).ConfigureAwait(false);
+
+            _logger.LogDebug("Downloaded artwork for episode: {Title}", episode.Title);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogDebug(ex, "Failed to download artwork for episode: {Title}", episode.Title);
+        }
+    }
+
     private async Task ProcessQueueAsync()
     {
         try