fix: preserve interaction replies across chat recovery

tests/routes/taskCollaboration.test.ts

@@ -7,6 +7,15 @@ import {
 } from "../../src/routes/chatStreamRoute.js";
 
 describe("task collaboration history", () => {
+  it("keeps accepted reply snapshots with both text and rich history", () => {
+    const reply = { type: "data-interaction_reply" as const, data: { interaction_id: "accepted-question" } };
+    for (const rich of [false, true]) {
+      const parts: UIMessage["parts"] = [{ type: "text", text: "核查范围: 北侧管网" }, reply,
+        ...(rich ? [{ type: "data-final_answer" as const, data: { content: "核查范围: 北侧管网" } }] : [])];
+      const messages = [{ id: "reply", role: "user", parts: [...parts, { type: "data-progress", data: { title: "执行记录" } }] }] as unknown as UIMessage[];
+      expect(toCollaborationMessages(messages)).toEqual([{ id: "reply", role: "user", parts }]);
+    }
+  });
   it("persists only user and assistant text instead of execution trajectory", () => {
     const messages = [
       { id: "user-1", role: "user", parts: [{ type: "text", text: "为什么这样判断？" }] },