refactor(apple-runner): move command exchange out of session owner

Author: thymikee

packages/platform-apple/src/runner/__tests__/runner-failure-diagnostics.test.ts

@@ -5,7 +5,7 @@ import { onTestFinished, test } from 'vitest';
 import { AppError } from '@agent-device/kernel/errors';
 import { logChunk } from '../runner-io.ts';
 import { captureRunnerLogAttempt } from '../runner-failure-diagnostics.ts';
-import { parseRunnerResponse } from '../runner-session.ts';
+import { parseRunnerResponse } from '../runner-exchange.ts';
 import { mkdtempForTestSync } from './tmp-dir.ts';
 
 /**

packages/platform-apple/src/runner/__tests__/runner-response.test.ts

@@ -8,7 +8,7 @@ import {
   readRunnerResponseData,
 } from '../runner-contract.ts';
 import { isStructuredRunnerFailure } from '../runner-error-classification.ts';
-import { parseRunnerResponse } from '../runner-session.ts';
+import { parseRunnerResponse } from '../runner-exchange.ts';
 import type { RunnerSessionState } from '../runner-session-types.ts';
 
 // A body cut off mid-write: the shape a runner that died while answering leaves behind.

packages/platform-apple/src/runner/__tests__/runner-session-response.test.ts

@@ -8,7 +8,7 @@ import { mkdtempForTestSync } from './tmp-dir.ts';
 import { appleRunnerTestHost } from '../test-host.ts';
 import { isRetryableRunnerError } from '../runner-error-classification.ts';
 import type { RunnerLogAttempt } from '../runner-failure-diagnostics.ts';
-import { parseRunnerResponse } from '../runner-session.ts';
+import { parseRunnerResponse } from '../runner-exchange.ts';
 
 test('parseRunnerResponse preserves runner unsupported-operation codes', async () => {
   const response = new Response(