feat(workflow): enhance message stages and image routing

frontend/src/components/workflow/specs.ts

@@ -16,6 +16,10 @@ export type WorkflowNodeType =
 export type ContextPolicy = "inherit" | "fresh";
 export type KnowledgeMode = "automatic" | "on_demand" | "disabled";
 export type AgentEntryMode = "wait_user" | "generate";
+export type MessageCompletionPolicy =
+  | "interruptible"
+  | "playback"
+  | "confirmation";
 export type ActionResultAssignmentMode = "inherit" | "override" | "none";
 export type ActionUserInputPolicy = "queue" | "block";
 export type EdgeMode = "llm" | "expression" | "always";
@@ -54,9 +58,12 @@ export type WorkflowNodeData = {
   resultAssignments?: Record<string, string>;
   userInputPolicy?: ActionUserInputPolicy;
   speech?: string;
+  /** Legacy field read only while an older graph is open in the editor. */
   showMessage?: boolean;
   title?: string;
   confirmLabel?: string;
+  completionPolicy?: MessageCompletionPolicy;
+  /** Legacy field read only while an older graph is open in the editor. */
   requireConfirmation?: boolean;
   targetType?: "ai" | "human" | "queue" | "phone";
   target?: string;
@@ -65,6 +72,20 @@ export type WorkflowNodeData = {
   [key: string]: unknown;
 };
 
+/** Infer the new Message policy for graphs saved before it was explicit. */
+export function messageCompletionPolicy(
+  data: WorkflowNodeData,
+): MessageCompletionPolicy {
+  if (
+    data.completionPolicy === "interruptible" ||
+    data.completionPolicy === "playback" ||
+    data.completionPolicy === "confirmation"
+  ) {
+    return data.completionPolicy;
+  }
+  return data.requireConfirmation === true ? "confirmation" : "playback";
+}
+
 /**
  * Resolve how an Action writes tool results while preserving workflows saved
  * before resultAssignmentMode existed. Those nodes explicitly passed an empty
@@ -242,11 +263,10 @@ export function defaultGraph(): WorkflowGraph {
         data: {
           name: "开场消息",
           speech: "你好，我是 AI 视频助手，有什么可以帮你？",
-          showMessage: false,
           title: "重要提示",
           message: "",
           confirmLabel: "确认",
-          requireConfirmation: false,
+          completionPolicy: "playback",
         },
       },
       {