Add active-turn steering (#3394)

* feat(agents): add active-turn steering

Let users choose whether an immediate prompt interrupts or joins the active turn. The daemon owns exact-turn admission, provider delivery, safe fallback, and canonical timeline identity while queueing remains client-side.

* fix(agents): stabilize steering history and replay QA

* fix(agents): preserve steering timeline order

* fix(agents): reconcile resumed provider history

* fix(agents): serialize steering with cancellation

* test(agents): prove Claude multi-tool steering

* test(agents): force explicit history hydration

* fix(agents): flush output before steer admission

packages/client/src/daemon-client.ts

@@ -13,6 +13,7 @@ import {
   ShutdownRequestedStatusPayloadSchema,
   DaemonUpdateResponseSchema,
   SessionInboundMessageSchema,
+  type ActiveTurnBehavior,
   type ServerInfoStatusPayload,
 } from "@getpaseo/protocol/messages";
 import { validateWSOutboundMessage } from "@getpaseo/protocol/validation/ws-outbound";
@@ -336,6 +337,7 @@ export interface DaemonClientTrace {
 
 export interface SendMessageOptions {
   messageId?: string;
+  activeTurnBehavior?: ActiveTurnBehavior;
   images?: Array<{ data: string; mimeType: string }>;
   attachments?: SendAgentMessageRequest["attachments"];
 }
@@ -2947,6 +2949,7 @@ export class DaemonClient {
       agentId,
       text,
       ...(messageId ? { messageId } : {}),
+      ...(options?.activeTurnBehavior ? { activeTurnBehavior: options.activeTurnBehavior } : {}),
       ...(options?.images ? { images: options.images } : {}),
       ...(options?.attachments ? { attachments: options.attachments } : {}),
     });