feat: 支持运行中 steer command

src/backend/adapter.ts

@@ -2,6 +2,13 @@ import type { BackendEvent, BackendTurnResult, CommandRecord, RunRecord } from "
 import { CodexStdioBackendSession, runCodexStdioTurn, type CodexStdioTurnOptions } from "./codex-stdio.js";
 import { backendProfileSpec } from "../common/backend-profiles.js";
 
+export interface BackendActiveTurnControl {
+  threadId: string;
+  turnId: string;
+  steer(prompt: string): Promise<void>;
+  interrupt(): Promise<void>;
+}
+
 export interface BackendAdapterOptions {
   codexCommand?: string;
   codexArgs?: string[];
@@ -9,6 +16,7 @@ export interface BackendAdapterOptions {
   workspacePath?: string;
   abortSignal?: AbortSignal;
   onEvent?: (event: BackendEvent) => void | Promise<void>;
+  onActiveTurn?: (control: BackendActiveTurnControl) => void | (() => void);
   env?: NodeJS.ProcessEnv;
 }
 
@@ -54,5 +62,6 @@ export function backendTurnOptions(run: RunRecord, command: CommandRecord, optio
   if (options.codexHome) turnOptions.codexHome = options.codexHome;
   if (options.abortSignal) turnOptions.abortSignal = options.abortSignal;
   if (options.onEvent) turnOptions.onEvent = options.onEvent;
+  if (options.onActiveTurn) turnOptions.onActiveTurn = options.onActiveTurn;
   return turnOptions;
 }