fix: improve auth flow and verification

src/GreenHome.Api/Controllers/AuthController.cs

@@ -52,5 +52,23 @@ public class AuthController : ControllerBase
         var canResend = await authService.CanResendCodeAsync(mobile, cancellationToken);
         return Ok(new { canResend });
     }
+
+    [HttpGet("me")]
+    public async Task<ActionResult<UserDto>> Me(CancellationToken cancellationToken)
+    {
+        var authHeader = Request.Headers.Authorization.ToString();
+        var token = authHeader.StartsWith("Bearer ", StringComparison.OrdinalIgnoreCase)
+            ? authHeader.Substring("Bearer ".Length).Trim()
+            : null;
+
+        if (string.IsNullOrEmpty(token))
+            return Unauthorized();
+
+        var user = await authService.GetUserByTokenAsync(token, cancellationToken);
+        if (user == null)
+            return Unauthorized();
+
+        return Ok(user);
+    }
 }
 

src/GreenHome.Application/Interfaces/IAuthService.cs

@@ -5,4 +5,5 @@ public interface IAuthService
     Task<SendCodeResponse> SendVerificationCodeAsync(SendCodeRequest request, CancellationToken cancellationToken);
     Task<VerifyCodeResponse> VerifyCodeAsync(VerifyCodeRequest request, CancellationToken cancellationToken);
     Task<bool> CanResendCodeAsync(string mobile, CancellationToken cancellationToken);
+    Task<UserDto?> GetUserByTokenAsync(string token, CancellationToken cancellationToken);
 }

src/GreenHome.Infrastructure/Services/Auth/AuthService.cs

@@ -2,6 +2,7 @@ using GreenHome.Application;
 using GreenHome.Infrastructure.Data;
 using GreenHome.Sms.Ippanel;
 using Microsoft.EntityFrameworkCore;
+using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.Logging;
 using System.Security.Cryptography;
 using System.Text;
@@ -13,17 +14,20 @@ public sealed class AuthService : IAuthService
     private readonly GreenHomeDbContext _dbContext;
     private readonly ISmsService _smsService;
     private readonly ILogger<AuthService> _logger;
+    private readonly string _tokenSecret;
     private const int CodeExpirationMinutes = 5;
     private const int ResendCooldownSeconds = 120;
 
     public AuthService(
         GreenHomeDbContext dbContext,
         ISmsService smsService,
+        IConfiguration configuration,
         ILogger<AuthService> logger)
     {
         _dbContext = dbContext;
         _smsService = smsService;
         _logger = logger;
+        _tokenSecret = configuration["Auth:TokenSecret"] ?? "greenhome-dev-secret-change-me";
     }
 
     public async Task<SendCodeResponse> SendVerificationCodeAsync(
@@ -162,7 +166,7 @@ public sealed class AuthService : IAuthService
 
         await _dbContext.SaveChangesAsync(cancellationToken);
 
-        var token = GenerateToken(user.Id, mobile);
+        var token = GenerateToken(user.Id);
 
         return new VerifyCodeResponse
         {
@@ -201,12 +205,51 @@ public sealed class AuthService : IAuthService
         return random.Next(1000, 9999).ToString();
     }
 
-    private static string GenerateToken(int userId, string mobile)
+    public async Task<UserDto?> GetUserByTokenAsync(string token, CancellationToken cancellationToken)
     {
-        var data = $"{userId}:{mobile}:{DateTime.UtcNow:yyyyMMddHHmmss}";
-        var bytes = Encoding.UTF8.GetBytes(data);
-        var hash = SHA256.HashData(bytes);
-        return Convert.ToBase64String(hash);
+        if (string.IsNullOrWhiteSpace(token))
+            return null;
+
+        var parts = token.Split('.');
+        if (parts.Length != 3)
+            return null;
+
+        if (!int.TryParse(parts[0], out var userId) || !long.TryParse(parts[1], out var expiresAt))
+            return null;
+
+        if (expiresAt < DateTimeOffset.UtcNow.ToUnixTimeSeconds())
+            return null;
+
+        var payload = $"{parts[0]}.{parts[1]}";
+        var expectedSignature = Convert.ToBase64String(
+            HMACSHA256.HashData(Encoding.UTF8.GetBytes(_tokenSecret), Encoding.UTF8.GetBytes(payload)));
+
+        if (!CryptographicOperations.FixedTimeEquals(
+                Encoding.UTF8.GetBytes(expectedSignature),
+                Encoding.UTF8.GetBytes(parts[2])))
+            return null;
+
+        var user = await _dbContext.Users.FirstOrDefaultAsync(u => u.Id == userId, cancellationToken);
+        if (user == null)
+            return null;
+
+        return new UserDto
+        {
+            Id = user.Id,
+            Mobile = user.Mobile,
+            Name = user.Name,
+            Family = user.Family,
+            Role = user.Role
+        };
+    }
+
+    private string GenerateToken(int userId)
+    {
+        var expiresAt = DateTimeOffset.UtcNow.AddDays(30).ToUnixTimeSeconds();
+        var payload = $"{userId}.{expiresAt}";
+        var signature = Convert.ToBase64String(
+            HMACSHA256.HashData(Encoding.UTF8.GetBytes(_tokenSecret), Encoding.UTF8.GetBytes(payload)));
+        return $"{payload}.{signature}";
     }
 
     private static string NormalizeMobile(string mobile)