Fix: 修复存储文件名和拓扑构建逻辑

- 修正存储文件名: network-topology.db -> devices.json
- 移除handleGetDevices中的重复builder重建逻辑
- 移除冗余的调试日志输出
- 统一日志术语: database -> storage
- 确保添加设备时正确更新builder和存储

cmd/main.go

@@ -31,10 +31,10 @@ type App struct {
 
 // NewApp 创建应用
 func NewApp(cfg *config.Config) *App {
-	// 初始化数据库
-	store, err := storage.NewStorage("network-topology.db")
+	// 初始化存储（使用JSON文件）
+	store, err := storage.NewStorage("devices.json")
 	if err != nil {
-		log.Printf("Warning: failed to initialize database: %v", err)
+		log.Printf("Warning: failed to initialize storage: %v", err)
 	}
 
 	app := &App{
@@ -257,21 +257,14 @@ func (app *App) handleTopology(w http.ResponseWriter, r *http.Request) {
 func (app *App) handleGetDevices(w http.ResponseWriter, r *http.Request) {
 	var devices []models.Device
 	
-	// 优先从数据库获取
+	// 优先从存储获取
 	if app.storage != nil {
 		var err error
 		devices, err = app.storage.GetAllDevices()
 		if err != nil {
-			log.Printf("Error: failed to get devices from database: %v", err)
+			log.Printf("Error: failed to get devices from storage: %v", err)
 			// 降级到 builder获取
 			devices = app.builder.GetDevices()
-		} else {
-			// 重新构建设备到builder中，确保拓扑正确
-			app.builder = topology.NewBuilder()
-			for _, dev := range devices {
-				app.builder.AddDevice(dev)
-			}
-			log.Printf("Rebuilt topology with %d devices from database", len(devices))
 		}
 		log.Printf("Returning %d devices from storage", len(devices))
 	} else {
@@ -319,12 +312,12 @@ func (app *App) handleAddDevice(w http.ResponseWriter, r *http.Request) {
 
 	app.builder.AddDevice(*dev)
 
-	// 保存到数据库
+	// 保存到存储
 	if app.storage != nil {
 		if err := app.storage.SaveDevice(dev); err != nil {
-			log.Printf("Error: failed to save device %s to database: %v", req.IP, err)
+			log.Printf("Error: failed to save device %s to storage: %v", req.IP, err)
 		} else {
-			log.Printf("Device %s saved to database successfully", req.IP)
+			log.Printf("Device %s saved to storage successfully", req.IP)
 		}
 	}