Introduction of tags

LD-SysInfo/Services/ApiClient.cs

@@ -177,7 +177,54 @@ namespace LD_SysInfo.Services
 
 
         /// <summary>
-        /// Sends the collected data to the server.
+        /// Refreshes the current JWT token without requiring username/password.
+        /// </summary>
+        public async Task<bool> RefreshTokenAsync()
+        {
+            try
+            {
+                if (string.IsNullOrEmpty(jwtToken))
+                {
+                    Console.WriteLine("⚠️ No token to refresh.");
+                    return false;
+                }
+
+                HttpResponseMessage response = await httpClient.PostAsync(BuildUrl("/api/auth/refresh"), null);
+                string rawResponse = await response.Content.ReadAsStringAsync();
+
+                if (!response.IsSuccessStatusCode)
+                {
+                    Console.WriteLine($"❌ Token refresh failed: {response.StatusCode} - {rawResponse}");
+                    return false;
+                }
+
+                // Parse the response to get the new token if provided in body
+                // Note: Your server sets it via cookie, but may also return it in response
+                try
+                {
+                    var refreshResponse = JsonConvert.DeserializeObject<Dictionary<string, string>>(rawResponse);
+                    if (refreshResponse?.ContainsKey("token") == true)
+                    {
+                        SetJwtToken(refreshResponse["token"]);
+                    }
+                }
+                catch
+                {
+                    // Token might only be in cookie, which is fine
+                }
+
+                Console.WriteLine("✅ Token refreshed successfully.");
+                return true;
+            }
+            catch (Exception ex)
+            {
+                Console.WriteLine($"❌ Exception during token refresh: {ex.Message}");
+                return false;
+            }
+        }
+
+        /// <summary>
+        /// Sends the collected data to the server with automatic token refresh and re-auth.
         /// </summary>
         private async Task<HttpResponseMessage> SendWithAutoReauthAsync(Func<Task<HttpResponseMessage>> requestFunc)
         {
@@ -185,8 +232,24 @@ namespace LD_SysInfo.Services
 
             if (response.StatusCode == System.Net.HttpStatusCode.Unauthorized)
             {
-                Console.WriteLine("⚠️ Token expired or invalid. Attempting re-auth...");
+                Console.WriteLine("⚠️ Token expired or invalid. Attempting token refresh...");
 
+                // Try refreshing the token first (faster than full re-auth)
+                bool refreshed = await RefreshTokenAsync();
+
+                if (refreshed)
+                {
+                    // Retry original request after refresh
+                    response = await requestFunc();
+
+                    if (response.IsSuccessStatusCode)
+                    {
+                        return response;
+                    }
+                }
+
+                // If refresh failed or didn't work, fall back to full re-authentication
+                Console.WriteLine("⚠️ Token refresh failed. Attempting full re-auth...");
                 var loginResponse = await AuthenticateAsync(_config.Auth.Username, _config.Auth.Password);
                 if (loginResponse == null || string.IsNullOrEmpty(loginResponse.Token))
                 {