Fix: 添加详细调试日志诊断拓扑连线问题

- 在拓扑构建时输出每个设备的邻居详情
- 显示邻居的RemoteIP、RemoteDevice、接口信息
- 从数据库加载设备后重建拓扑确保连线正确
- 帮助诊断为什么邻居无法自动连线

internal/topology/builder.go

@@ -50,6 +50,15 @@ func (b *Builder) Build() models.TopologyGraph {
 		}
 		nodeMap[device.IP] = node
 		graph.Nodes = append(graph.Nodes, node)
+		
+		// 调试信息
+		fmt.Printf("Node added: %s (%s) with %d neighbors\n", 
+			device.IP, device.Type, len(device.Neighbors))
+		for i, neighbor := range device.Neighbors {
+			fmt.Printf("  Neighbor %d: RemoteIP=%s, RemoteDevice=%s, LocalIf=%s, RemoteIf=%s\n",
+				i+1, neighbor.RemoteIP, neighbor.RemoteDevice, 
+				neighbor.LocalInterface, neighbor.RemoteInterface)
+		}
 	}
 
 	// 构建边(基于邻居信息)