Switch to SmartRes Result/Error, upgrade to .NET 10

Migrate codebase to use SmartRes Result<T, Error> (and Unit) across services and interfaces, replacing previous Result usage and updating many method signatures and implementations. Add ResultExtensions to convert SmartRes results to ASP.NET ActionResult and refactor AuthController to use functional Bind/Tap chains for registration/login flows. Upgrade projects to .NET 10 and bump related NuGet packages; add libs/SmartRes.dll and project references. Simplify DbContext registration to use Npgsql only with retry policies and enable detailed logging. Update Swagger/launch settings and other minor fixes (AutoMapper registration change, whitespace/exception handling, and removal of the Govor.ConsoleClient files).

Govor.Application/Friends/FriendRequestCommandService.cs

@@ -5,6 +5,7 @@ using Govor.Domain;
 using Govor.Domain.Common;
 using Govor.Domain.Models;
 using Microsoft.EntityFrameworkCore;
+using SmartRes;
 
 namespace Govor.Application.Friends;
 
@@ -21,10 +22,10 @@ public class FriendRequestCommandService : IFriendRequestCommandService
         _privateChatsCreator = privateChatsCreator;
     }
     
-    public async Task<Result<Friendship>> SendAsync(Guid fromUserId, Guid toUserId)
+    public async Task<Result<Friendship, Error>> SendAsync(Guid fromUserId, Guid toUserId)
     {
         if (fromUserId == toUserId)
-           return Result<Friendship>.Failure(new Error(
+           return Result.Failure<Friendship>(Error.Failure(
                "Friendship.Send", 
                "Cannot send a request to self user")
            );
@@ -50,7 +51,7 @@ public class FriendRequestCommandService : IFriendRequestCommandService
                 friendship.Status == FriendshipStatus.Accepted ||
                 friendship.Status == FriendshipStatus.Blocked)
             {
-                return Result<Friendship>.Failure(new Error(
+                return Result.Failure<Friendship>(Error.Conflict(
                     "Friendship.Send", 
                     $"The request is already {friendship.Status}")
                 );
@@ -65,24 +66,24 @@ public class FriendRequestCommandService : IFriendRequestCommandService
         return friendship;
     }
 
-    public async Task<Result<Friendship>> AcceptAsync(Guid requestId, Guid currentUserId)
+    public async Task<Result<Friendship, Error>> AcceptAsync(Guid requestId, Guid currentUserId)
     {
         var friendship = await _context.Friendships.FindAsync(requestId);
         
         if (friendship is null)
-            return Result<Friendship>.Failure(new Error(
+            return Result.Failure<Friendship>(Error.NotFound(
                 "Friendship.Accept",
                 "Friendship not found! You cant accept request!")
             );
             
         if (friendship.AddresseeId != currentUserId)
-            return Result<Friendship>.Failure(new Error(
+            return Result.Failure<Friendship>(Error.Forbidden(
                 "Friendship.Accept",
                 "You cannot accept this request!")
             );
 
         if (friendship.Status != FriendshipStatus.Pending)
-            return Result<Friendship>.Failure(new Error(
+            return Result.Failure<Friendship>(Error.Forbidden(
                 "Friendship.Accept",
                 "Request is already accepted!")
             );
@@ -96,24 +97,24 @@ public class FriendRequestCommandService : IFriendRequestCommandService
         return friendship;
     }
 
-    public async Task<Result<Friendship>> RejectAsync(Guid requestId, Guid currentUserId)
+    public async Task<Result<Friendship, Error>> RejectAsync(Guid requestId, Guid currentUserId)
     {
         var friendship = await _context.Friendships.FindAsync(requestId);
 
         if (friendship == null)
-            return Result<Friendship>.Failure(new Error(
+            return Result.Failure<Friendship>(Error.NotFound(
                 "Friendship.Reject",
                 "Friendship not found! You cant reject request!")
             );
 
         if (friendship.AddresseeId != currentUserId)
-            return Result<Friendship>.Failure(new Error(
+            return Result.Failure<Friendship>(Error.Forbidden(
                 "Friendship.Reject",
                 "You cannot reject this request!")
             );
 
         if (friendship.Status != FriendshipStatus.Pending && friendship.Status != FriendshipStatus.Rejected)
-            return Result<Friendship>.Failure(new Error(
+            return Result.Failure<Friendship>(Error.Conflict(
                 "Friendship.Reject",
                 $"Request is already {friendship.Status}")
             );

Govor.Application/Friends/IFriendRequestCommandService.cs

@@ -1,11 +1,12 @@
 using Govor.Domain.Common;
 using Govor.Domain.Models;
+using SmartRes;
 
 namespace Govor.Application.Friends;
 
 public interface IFriendRequestCommandService
 {
-    Task<Result<Friendship>> SendAsync(Guid fromUserId, Guid toUserId);
-    Task<Result<Friendship>> AcceptAsync(Guid requestId, Guid currentUserId);
-    Task<Result<Friendship>> RejectAsync(Guid requestId, Guid currentUserId);
+    Task<Result<Friendship, Error>> SendAsync(Guid fromUserId, Guid toUserId);
+    Task<Result<Friendship, Error>> AcceptAsync(Guid requestId, Guid currentUserId);
+    Task<Result<Friendship, Error>> RejectAsync(Guid requestId, Guid currentUserId);
 }