many fixes and improvements - rework for modules/ and common/

feat(emailer): add Postmark and Resend providers

backend/Modules/Contents/Features/RemovePhotoFromAlbum.cs

@@ -0,0 +1,73 @@
+using Hutopy.Infrastructure.Security;
+using Hutopy.Modules.Contents.Data;
+
+namespace Hutopy.Modules.Contents.Features;
+
+[PublicAPI]
+public record RemovePhotoFromAlbumRequest(
+    Guid AlbumId,
+    Guid PhotoId);
+
+[PublicAPI]
+public sealed class RemovePhotoFromAlbumRequestValidator : Validator<RemovePhotoFromAlbumRequest>
+{
+    public RemovePhotoFromAlbumRequestValidator()
+    {
+        RuleFor(x => x.AlbumId)
+            .NotNull()
+            .NotEmpty();
+
+        RuleFor(x => x.PhotoId)
+            .NotNull()
+            .NotEmpty();
+    }
+}
+
+[PublicAPI]
+public class RemovePhotoFromAlbumHandler(
+    ContentsDbContext context)
+    : Endpoint<RemovePhotoFromAlbumRequest>
+{
+    public override void Configure()
+    {
+        Delete("/api/albums/{AlbumId}/photos/{PhotoId}");
+        Options(o => o.WithTags("Albums"));
+    }
+
+    public override async Task HandleAsync(
+        RemovePhotoFromAlbumRequest request,
+        CancellationToken ct)
+    {
+        var userId = User.GetUserId();
+
+        var album = await context
+            .Albums
+            .Include(a => a.Photos)
+            .SingleOrDefaultAsync(
+                a => a.Id == request.AlbumId && a.CreatedBy == userId,
+                cancellationToken: ct);
+
+        if (album is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        var photo = album.Photos
+            .SingleOrDefault(p => p.Id == request.PhotoId);
+
+        if (photo is null)
+        {
+            await SendNotFoundAsync(ct);
+            return;
+        }
+
+        // Soft delete the photo
+        photo.DeletedBy = userId;
+        photo.DeletedAt = DateTimeOffset.UtcNow;
+        
+        await context.SaveChangesAsync(ct);
+
+        await SendNoContentAsync(ct);
+    }
+}