feat: add deterministic message interaction stages

frontend/src/components/workflow/WorkflowCanvas.tsx

@@ -63,21 +63,30 @@ let nodeSeq = 0;
 function defaultNodeData(spec: RuntimeNodeSpec): WorkflowNodeData {
   const data: WorkflowNodeData = {
     name: spec.displayName,
-    ...(spec.type === "agent"
-      ? {
-          contextPolicy: "inherit",
-          inheritGlobalConfig: true,
-          entryMode: "wait_user",
-          entrySpeech: "",
-        }
-      : spec.type === "action"
-        ? {
-            arguments: {},
-            resultAssignmentMode: "inherit",
-            userInputPolicy: "queue",
-          }
-      : {}),
   };
+  if (spec.type === "agent") {
+    Object.assign(data, {
+      contextPolicy: "inherit",
+      inheritGlobalConfig: true,
+      entryMode: "wait_user",
+      entrySpeech: "",
+    });
+  } else if (spec.type === "action") {
+    Object.assign(data, {
+      arguments: {},
+      resultAssignmentMode: "inherit",
+      userInputPolicy: "queue",
+    });
+  } else if (spec.type === "message") {
+    Object.assign(data, {
+      speech: "",
+      showMessage: false,
+      title: "重要提示",
+      message: "",
+      confirmLabel: "确认",
+      requireConfirmation: false,
+    });
+  }
   for (const field of spec.fields) {
     if (field.default !== undefined) data[field.key] = field.default;
   }