Fix update AgentName

src/Managing.Infrastructure.Database/PostgreSql/AgentSummaryRepository.cs

@@ -297,4 +297,25 @@ public class AgentSummaryRepository : IAgentSummaryRepository
 
         return agentSummaries.Select(MapToDomain);
     }
+
+    public async Task UpdateAgentNameAsync(int userId, string agentName)
+    {
+        var entity = await _context.AgentSummaries
+            .FirstOrDefaultAsync(a => a.UserId == userId);
+
+        if (entity != null)
+        {
+            entity.AgentName = agentName;
+            entity.UpdatedAt = DateTime.UtcNow;
+            
+            await _context.SaveChangesAsync();
+            
+            _logger.LogInformation("Agent name updated for user {UserId} to {AgentName}", userId, agentName);
+        }
+        else
+        {
+            _logger.LogWarning("No AgentSummary found for user {UserId} when trying to update agent name to {AgentName}", 
+                userId, agentName);
+        }
+    }
 }