Feat: 支持通过MAC地址进行邻居匹配和拓扑连线

- Neighbor模型添加RemoteMAC字段
- Device模型添加MACAddresses字段
- H3C解析器保存邻居MAC地址和设备所有接口MAC
- 拓扑构建支持三层匹配: IP -> 设备名 -> MAC地址
- 即使ARP表获取失败也能通过MAC地址自动连线

internal/topology/builder.go

@@ -56,24 +56,41 @@ func (b *Builder) Build() models.TopologyGraph {
 	edgeMap := make(map[string]bool) // 用于去重
 	for _, device := range b.devices {
 		for _, neighbor := range device.Neighbors {
-			// 检查邻居是否在设备列表中
-			if _, exists := nodeMap[neighbor.RemoteIP]; !exists && neighbor.RemoteDevice != "" {
-				// 尝试通过设备名匹配
+			// 尝试匹配邻居设备
+			targetIP := neighbor.RemoteIP
+			
+			// 如果没有IP，尝试通过设备名匹配
+			if targetIP == "" && neighbor.RemoteDevice != "" {
 				for _, d := range b.devices {
 					if d.Hostname == neighbor.RemoteDevice {
-						neighbor.RemoteIP = d.IP
+						targetIP = d.IP
+						break
+					}
+				}
+			}
+			
+			// 如果还是没有，尝试通过MAC地址匹配（新增）
+			if targetIP == "" && neighbor.RemoteMAC != "" {
+				for _, d := range b.devices {
+					for _, mac := range d.MACAddresses {
+						if mac == neighbor.RemoteMAC {
+							targetIP = d.IP
+							break
+						}
+					}
+					if targetIP != "" {
 						break
 					}
 				}
 			}
 
-			if neighbor.RemoteIP == "" {
+			if targetIP == "" {
 				continue
 			}
 
 			// 创建唯一的边ID
-			edgeID := fmt.Sprintf("%s-%s-%s", device.IP, neighbor.LocalInterface, neighbor.RemoteIP)
-			reverseEdgeID := fmt.Sprintf("%s-%s-%s", neighbor.RemoteIP, neighbor.RemoteInterface, device.IP)
+			edgeID := fmt.Sprintf("%s-%s-%s", device.IP, neighbor.LocalInterface, targetIP)
+			reverseEdgeID := fmt.Sprintf("%s-%s-%s", targetIP, neighbor.RemoteInterface, device.IP)
 
 			// 避免重复边
 			if edgeMap[edgeID] || edgeMap[reverseEdgeID] {
@@ -83,7 +100,7 @@ func (b *Builder) Build() models.TopologyGraph {
 			edge := models.TopologyEdge{
 				ID:              edgeID,
 				Source:          device.IP,
-				Target:          neighbor.RemoteIP,
+				Target:          targetIP,
 				SourceInterface: neighbor.LocalInterface,
 				TargetInterface: neighbor.RemoteInterface,
 				Protocol:        neighbor.Protocol,