Refactor media asset handling: update ListMediaAssetsQuery to accept an array of statuses, modify MediaEndpoints to handle multiple statuses, and enhance MediaProcessingQueue for improved signal handling. Update frontend components to support new status filtering and improve user experience with asset selection.

backend/src/TeleWave.Application/Media/ListMedia/ListMediaAssetsQuery.cs

@@ -7,6 +7,6 @@ namespace TeleWave.Application.Media.ListMedia;
 public sealed record ListMediaAssetsQuery(
     int Page,
     int PageSize,
-    MediaAssetStatus? Status,
+    IReadOnlyList<MediaAssetStatus> Statuses,
     string? Search
 ) : IQuery<PagedList<MediaAssetDto>>;

backend/src/TeleWave.Application/Media/ListMedia/ListMediaAssetsQueryHandler.cs

@@ -15,8 +15,8 @@ public sealed class ListMediaAssetsQueryHandler(IAppDbContext dbContext)
     {
         var q = dbContext.MediaAssets.AsNoTracking();
 
-        if (query.Status is { } status)
-            q = q.Where(x => x.Status == status);
+        if (query.Statuses.Count > 0)
+            q = q.Where(x => query.Statuses.Contains(x.Status));
 
         if (!string.IsNullOrWhiteSpace(query.Search))
         {