test(orchestration): keep scripted Codex homes in each test directory (#40964)

The scripted Codex fixture hard-coded /home/dev/.codex as the account
home on every platform. Startup now reads hook configuration from the
account home, so coordinator-worker tests stalled on macOS before the
scripted connection opened. Build the fake account home inside each
test's temporary fixture root and pass that root to every attach caller.

src/main/runtime/orchestration/terminal-authority/structured-sessions/structured-chat-coordinator-fake-codex-fixture.ts

@@ -1,3 +1,4 @@
+import { join } from 'node:path'
 import type {
   CodexAppServerConnection,
   CodexAppServerConnectionHandlers
@@ -142,7 +143,7 @@ export function operationId(): string {
   return `${Date.now()}-${operations.toString(16).padStart(32, '0')}`
 }
 
-export function attachParams(sessionId: string) {
+export function attachParams(sessionId: string, fixtureRoot: string) {
   const params = {
     location: {
       executionHostId: 'local' as const,
@@ -152,7 +153,7 @@ export function attachParams(sessionId: string) {
     },
     provider: 'codex' as const,
     agent: 'codex' as const,
-    accountHome: { variable: 'CODEX_HOME' as const, path: '/home/dev/.codex' },
+    accountHome: { variable: 'CODEX_HOME' as const, path: join(fixtureRoot, 'codex-home') },
     runtimeKind: 'native' as const
   }
   const envelope = {

src/main/runtime/orchestration/terminal-authority/structured-sessions/structured-chat-coordinator-mail-rig.test-fixture.ts

@@ -84,7 +84,7 @@ export async function call(
 }
 
 export async function openChat(sessionId: string): Promise<FakeConnection> {
-  const attached = await host.attach({ callerKey: 'test-surface' }, attachParams(sessionId))
+  const attached = await host.attach({ callerKey: 'test-surface' }, attachParams(sessionId, root))
   expect(attached, JSON.stringify(attached)).toMatchObject({ ok: true })
   await host.setSessionTabVisibility(sessionId, true)
   threadBySession.set(sessionId, codex.connections.at(-1)!.threadId!)

src/main/runtime/orchestration/terminal-authority/structured-sessions/structured-chat-worker-reuse.test.ts

@@ -39,7 +39,10 @@ vi.mock(
     }) => {
       const rig = await import('./structured-chat-coordinator-mail-rig.test-fixture')
       const { attachParams } = await import('./structured-chat-coordinator-fake-codex-fixture')
-      const attached = await rig.host.attach(args.caller, attachParams(args.envelope.sessionId))
+      const attached = await rig.host.attach(
+        args.caller,
+        attachParams(args.envelope.sessionId, rig.root)
+      )
       await rig.host.setSessionTabVisibility(args.envelope.sessionId, true)
       rig.threadBySession.set(args.envelope.sessionId, rig.codex.connections.at(-1)!.threadId!)
       return attached

src/main/runtime/orchestration/terminal-authority/structured-sessions/structured-chat-worker-start-unknown.test.ts

@@ -10,6 +10,7 @@ import {
   db,
   host,
   openChat,
+  root,
   runtime
 } from './structured-chat-coordinator-mail-rig.test-fixture'
 
@@ -34,7 +35,7 @@ it('keeps a minted worker start unknown after one preamble handover without an e
   } as never)
   vi.spyOn(sessionCreate, 'createStructuredAgentSessionForWorktree').mockImplementation(
     async (args) => {
-      const attached = await host.attach(args.caller, attachParams(args.envelope.sessionId))
+      const attached = await host.attach(args.caller, attachParams(args.envelope.sessionId, root))
       if (!attached.ok) {
         throw new Error('scripted worker attach refused')
       }