chore(codebase): full cleanup pass

backend/Modules/Messaging/Handlers/AddMessage.cs

@@ -40,14 +40,14 @@ public class AddMessage(
         AddMessageRequest req,
         CancellationToken ct)
     {
-        var message = new Message
+        Message message = new()
         {
             Id = req.Id ?? Guid.CreateVersion7(),
             SubjectId = req.SubjectId,
             CreatedBy = User.GetUserId(),
             Value = req.Message
-        }; 
-        
+        };
+
         await context.Messages.AddAsync(message, ct);
 
         await context.SaveChangesAsync(ct);

backend/Modules/Messaging/Handlers/AddReply.cs

@@ -20,7 +20,7 @@ internal sealed class AddReplyRequestValidator
         RuleFor(r => r.ParentId)
             .NotNull().WithMessage("You must specify a ParentId")
             .NotEmpty().WithMessage("You must specify a non-empty ParentId");
-        
+
         RuleFor(r => r.SubjectId)
             .NotNull().WithMessage("You must specify a SubjectId")
             .NotEmpty().WithMessage("You must specify a non-empty SubjectId");
@@ -45,10 +45,10 @@ internal sealed class AddReply(
         AddReplyRequest req,
         CancellationToken ct)
     {
-        var message = new Message
+        Message message = new()
         {
             Id = Guid.CreateVersion7(),
-            SubjectId = req.SubjectId, 
+            SubjectId = req.SubjectId,
             ParentId = req.ParentId,
             CreatedBy = User.GetUserId(),
             Value = req.Message

backend/Modules/Messaging/Handlers/ChangeMessage.cs

@@ -39,15 +39,15 @@ public class ChangeMessage(
         ChangeMessageRequest req,
         CancellationToken ct)
     {
-        var message = await context.Messages.FirstOrDefaultAsync(x => x.Id == req.Id, ct);
-        
+        Message? message = await context.Messages.FirstOrDefaultAsync(x => x.Id == req.Id, ct);
+
         if (message is null)
         {
             await SendNotFoundAsync(ct);
             return;
         }
-        
-        var userId = HttpContext.User.GetUserId();
+
+        Guid userId = HttpContext.User.GetUserId();
         if (message.CreatedBy != userId)
         {
             await SendForbiddenAsync(ct);
@@ -58,7 +58,7 @@ public class ChangeMessage(
         message.Value = req.Message;
 
         context.Update(message);
-        
+
         await context.SaveChangesAsync(ct);
     }
 }

backend/Modules/Messaging/Handlers/DeleteMessage.cs

@@ -30,21 +30,21 @@ public class DeleteMessage(
         DeleteMessageRequest req,
         CancellationToken ct)
     {
-        var message = await context.Messages.FirstOrDefaultAsync(x => x.Id == req.MessageId, ct);
+        Message? message = await context.Messages.FirstOrDefaultAsync(x => x.Id == req.MessageId, ct);
 
         if (message is null)
         {
             await SendNotFoundAsync(ct);
             return;
         }
-        
-        var userId = HttpContext.User.GetUserId();
+
+        Guid userId = HttpContext.User.GetUserId();
         if (message.CreatedBy != userId)
         {
             await SendForbiddenAsync(ct);
             return;
         }
-        
+
         context.Messages.Remove(message);
 
         await context.SaveChangesAsync(ct);

backend/Modules/Messaging/Handlers/GetMessageCount.cs

@@ -28,17 +28,14 @@ public class GetMessageCount(
         GetMessageCountRequest req,
         CancellationToken ct)
     {
-        var messageCount = await context.GetMessageCountAsync(
+        int messageCount = await context.GetMessageCountAsync(
             req.SubjectId,
             null,
             req.PageSize,
             ct);
-        
+
         await SendAsync(
-            new()
-            {
-                Count = messageCount
-            },
+            new GetMessageCountResponse { Count = messageCount },
             cancellation: ct);
     }
 }

backend/Modules/Messaging/Handlers/GetMessages.cs

@@ -30,13 +30,13 @@ public class GetMessages(
         GetMessagesRequest req,
         CancellationToken ct)
     {
-        var messages = await context.GetMessagesAsync(
+        IEnumerable<MessageDto> messages = await context.GetMessagesAsync(
             req.SubjectId,
             null,
             req.LastId,
             req.PageSize,
             ct);
-        
+
         await SendOkAsync(new GetMessagesResponse(messages), ct);
     }
 }

backend/Modules/Messaging/Handlers/GetMessagesByUser.cs

@@ -30,16 +30,16 @@ public class GetMessagesByUser(
         GetMessagesByUserRequest req,
         CancellationToken ct)
     {
-        var messages = await context
+        List<Message> messages = await context
             .Messages
             .Where(c => c.CreatedBy == req.UserId)
             .Where(c => c.ParentId == null)
-            .ToListAsync(cancellationToken: ct);
+            .ToListAsync(ct);
 
-        var result = await Task.WhenAll(
+        MessageDto[] result = await Task.WhenAll(
             messages.Select(async message =>
             {
-                var user = await userLookup.GetUserAsync(message.CreatedBy, ct);
+                UserReference? user = await userLookup.GetUserAsync(message.CreatedBy, ct);
 
                 return new MessageDto
                 {

backend/Modules/Messaging/Handlers/GetReplies.cs

@@ -31,7 +31,7 @@ public class GetReplies(
         GetRepliesRequest req,
         CancellationToken ct)
     {
-        var replies = await context.GetMessagesAsync(
+        IEnumerable<MessageDto> replies = await context.GetMessagesAsync(
             req.SubjectId,
             req.ParentId,
             req.LastId,