feat: add managed llm summaries and memory timeline

internal/httpapi/saas_handlers.go

@@ -1044,6 +1044,21 @@ func ListConversationSummariesHandler(service *saas.Service) http.Handler {
 	})
 }
 
+func RegenerateConversationSummaryHandler(service *saas.Service) http.Handler {
+	return http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
+		principal, ok := resourcePrincipal(writer, request, "id")
+		if !ok {
+			return
+		}
+		version, err := service.RegenerateConversationSummary(request.Context(), principal, request.PathValue("id"), RequestID(request.Context()))
+		if err != nil {
+			writeSaaSError(writer, request, err)
+			return
+		}
+		WriteJSON(writer, request, http.StatusAccepted, map[string]any{"generation_version": version, "status": "queued"})
+	})
+}
+
 func ListSubjectStoriesHandler(service *saas.Service) http.Handler {
 	return http.HandlerFunc(func(writer http.ResponseWriter, request *http.Request) {
 		principal, ok := resourcePrincipal(writer, request, "id")
@@ -1921,6 +1936,8 @@ func writeSaaSError(writer http.ResponseWriter, request *http.Request, err error
 		WriteError(writer, request, http.StatusConflict, "STORY_REVIEW_STATE_CONFLICT", "当前故事审核状态不允许此操作")
 	case errors.Is(err, saas.ErrFactReviewStateConflict):
 		WriteError(writer, request, http.StatusConflict, "FACT_REVIEW_STATE_CONFLICT", "当前事实候选状态不允许此操作")
+	case errors.Is(err, saas.ErrConversationSummaryNotReady):
+		WriteError(writer, request, http.StatusConflict, "CONVERSATION_SUMMARY_NOT_READY", "聊天尚未结束或没有可用于总结的文字内容")
 	case errors.Is(err, pagination.ErrInvalidCursor):
 		writeValidation(writer, request, "分页游标无效", FieldError{Field: "cursor", Message: "游标无效、已损坏或不是本服务签发"})
 	default: