feat: add system tools and state updates

frontend/src/components/workflow/specs.ts

@@ -3,7 +3,7 @@
 import * as LucideIcons from "lucide-react";
 import { Circle, type LucideIcon } from "lucide-react";
 
-import type { NodeSpecDto, TurnConfig } from "@/lib/api";
+import type { NodeSpecDto, SystemToolKind, TurnConfig } from "@/lib/api";
 import { defaultTurnConfig } from "@/lib/turn-config";
 
 export type WorkflowNodeType =
@@ -11,6 +11,7 @@ export type WorkflowNodeType =
   | "agent"
   | "message"
   | "action"
+  | "update_state"
   | "handoff"
   | "end";
 export type ContextPolicy = "inherit" | "fresh";
@@ -40,6 +41,8 @@ export type WorkflowNodeData = {
   contextPolicy?: ContextPolicy;
   inheritGlobalConfig?: boolean;
   entryMode?: AgentEntryMode;
+  systemTools?: SystemToolKind[];
+  stateVariableNames?: string[];
   toolIds?: string[];
   knowledgeBaseId?: string;
   knowledgeMode?: KnowledgeMode;
@@ -56,6 +59,7 @@ export type WorkflowNodeData = {
   arguments?: Record<string, unknown>;
   resultAssignmentMode?: ActionResultAssignmentMode;
   resultAssignments?: Record<string, string>;
+  assignments?: Record<string, unknown>;
   userInputPolicy?: ActionUserInputPolicy;
   speech?: string;
   /** Legacy field read only while an older graph is open in the editor. */
@@ -279,6 +283,8 @@ export function defaultGraph(): WorkflowGraph {
           contextPolicy: "inherit",
           inheritGlobalConfig: true,
           entryMode: "wait_user",
+          systemTools: [],
+          stateVariableNames: [],
         },
       },
       {