完善多赛道联调与全局产品架构

backend/internal/service/session_service.go

@@ -26,6 +26,9 @@ type SessionResult struct {
 		Status                string  `json:"status"`
 		ClientType            string  `json:"clientType"`
 		DeviceKey             string  `json:"deviceKey"`
+		AssignmentMode        *string `json:"assignmentMode,omitempty"`
+		VariantID             *string `json:"variantId,omitempty"`
+		VariantName           *string `json:"variantName,omitempty"`
 		RouteCode             *string `json:"routeCode,omitempty"`
 		SessionTokenExpiresAt string  `json:"sessionTokenExpiresAt"`
 		LaunchedAt            string  `json:"launchedAt"`
@@ -264,6 +267,9 @@ func buildSessionResult(session *postgres.Session) *SessionResult {
 	result.Session.Status = session.Status
 	result.Session.ClientType = session.ClientType
 	result.Session.DeviceKey = session.DeviceKey
+	result.Session.AssignmentMode = session.AssignmentMode
+	result.Session.VariantID = session.VariantID
+	result.Session.VariantName = session.VariantName
 	result.Session.RouteCode = session.RouteCode
 	result.Session.SessionTokenExpiresAt = session.SessionTokenExpiresAt.Format(time.RFC3339)
 	result.Session.LaunchedAt = session.LaunchedAt.Format(time.RFC3339)