fix: preserve interaction replies across chat recovery

src/routes/chatUiState.ts

@@ -7,7 +7,7 @@ import {
   type TodoUpdatePayload,
 } from "./chatStream.js";
 
-export type RunStatus = "running" | "completed" | "error" | "aborted";
+export type RunStatus = "running" | "waiting_input" | "completed" | "error" | "aborted";
 
 export type StreamSubscriber = {
   write: (event: string, data: Record<string, unknown>) => void;
@@ -82,8 +82,13 @@ export const upsertBackendProgress = (
   const next = Array.isArray(progress) ? [...progress] : [];
   const id = typeof payload.id === "string" ? payload.id : `progress-${Date.now()}`;
   const index = next.findIndex((item) => isObjectRecord(item) && item.id === id);
+  const existing = index >= 0 && isObjectRecord(next[index]) ? next[index] : undefined;
+  const tool = isObjectRecord(payload.tool) && typeof payload.tool.name === "string"
+    ? { name: payload.tool.name, callId: typeof payload.tool.call_id === "string" ? payload.tool.call_id : undefined, input: isObjectRecord(payload.tool.input) ? payload.tool.input : undefined }
+    : existing?.tool;
   const nextItem = {
     id,
+    tool,
     phase: typeof payload.phase === "string" ? payload.phase : "progress",
     status:
       payload.status === "completed" || payload.status === "error"