feat: Add RegisterAsync endpoint to AuthController (Refs #2)

Backend/PruebaGentle.API/Controllers/AuthController.cs

@@ -48,6 +48,40 @@ public class AuthController : ControllerBase
         });
     }
 
+    [HttpPost("register")]
+    public async Task<IActionResult> Register([FromBody] RegisterDto dto)
+    {
+        var user = new PruebaGentle.Core.Entities.User
+        {
+            Username = dto.Username,
+            PasswordHash = _passwordHasher.Hash(dto.Password),
+            Email = dto.Email,
+            NombreCompleto = dto.NombreCompleto
+        };
+
+        try
+        {
+            var created = await _userRepository.RegisterAsync(user);
+            var expiresAt = DateTime.UtcNow.AddHours(_jwtSettings.ExpirationHours);
+            var token = GenerateJwtToken(created.Id, created.Username, created.Email, expiresAt);
+
+            return Created(string.Empty, new RegisterResponseDto
+            {
+                Token = token,
+                ExpiresAt = expiresAt,
+                UserId = created.Id
+            });
+        }
+        catch (Microsoft.Data.SqlClient.SqlException ex) when (ex.Number == 50001)
+        {
+            return Conflict(new { error = "El nombre de usuario ya existe." });
+        }
+        catch (Microsoft.Data.SqlClient.SqlException ex) when (ex.Number == 50002)
+        {
+            return Conflict(new { error = "El email ya existe." });
+        }
+    }
+
     private string GenerateJwtToken(int userId, string username, string email, DateTime expiresAt)
     {
         var key = new SymmetricSecurityKey(Encoding.UTF8.GetBytes(_jwtSettings.Secret));

Backend/PruebaGentle.Core/Interfaces/IUserRepository.cs

@@ -10,4 +10,5 @@ public interface IUserRepository
     Task<User?> UpdateAsync(User user);
     Task<bool> DeleteAsync(int id);
     Task<User?> GetByUsernameAsync(string username);
+    Task<User> RegisterAsync(User user);
 }

Backend/PruebaGentle.Infrastructure/Repositories/UserRepository.cs

@@ -86,4 +86,21 @@ public class UserRepository : IUserRepository
             new { Username = username },
             commandType: CommandType.StoredProcedure);
     }
+
+    public async Task<User> RegisterAsync(User user)
+    {
+        using var connection = CreateConnection();
+        var result = await connection.QuerySingleAsync<User>(
+            "sp_User_Register",
+            new
+            {
+                user.Username,
+                user.PasswordHash,
+                user.Email,
+                user.NombreCompleto
+            },
+            commandType: CommandType.StoredProcedure);
+
+        return result;
+    }
 }