feat(api): add traffic log details filtering and enhance traffic log structures

internal/model/log/log.go

@@ -352,6 +352,7 @@ type ServerTraffic struct {
 	ServerId int64 `json:"server_id"` // Server ID
 	Upload   int64 `json:"upload"`    // Upload traffic in bytes
 	Download int64 `json:"download"`  // Download traffic in bytes
+	Total    int64 `json:"total"`     // Total traffic in bytes (Upload + Download)
 }
 
 // Marshal implements the json.Marshaler interface for ServerTraffic.

internal/model/log/model.go

@@ -26,7 +26,7 @@ type customSystemLogLogicModel interface {
 }
 
 func (m *customSystemLogModel) FilterSystemLog(ctx context.Context, filter *FilterParams) ([]*SystemLog, int64, error) {
-	tx := m.WithContext(ctx).Model(&SystemLog{})
+	tx := m.WithContext(ctx).Model(&SystemLog{}).Order("id DESC")
 	if filter == nil {
 		filter = &FilterParams{
 			Page: 1,