Prefer AGENTS.md over CLAUDE.md for project instructions (#439)

* Prefer AGENTS.md over CLAUDE.md for project instructions

* fix: preserve CLAUDE.md fallback behavior

* fix: isolate onboarding tests and preserve legacy init

* fix: restore full fsOperations exports in test mock and align compact cwd

* Fix onboarding test isolation and init migration guidance

* Tighten init prompt coverage and onboarding copy

* Handle nested project instruction paths consistently

* Fix NEW_INIT feature gate for Bun build

---------

Co-authored-by: 赵小落 <zhaoxiaoluo@zhaoxiaoluodeMac-mini.local>
Co-authored-by: zhaomo01 <zhaomo01@baidu.com>

src/projectOnboardingState.ts

@@ -1,50 +1,14 @@
 import memoize from 'lodash-es/memoize.js'
-import { join } from 'path'
 import {
   getCurrentProjectConfig,
   saveCurrentProjectConfig,
 } from './utils/config.js'
-import { getCwd } from './utils/cwd.js'
-import { isDirEmpty } from './utils/file.js'
-import { getFsImplementation } from './utils/fsOperations.js'
-
-export type Step = {
-  key: string
-  text: string
-  isComplete: boolean
-  isCompletable: boolean
-  isEnabled: boolean
-}
-
-export function getSteps(): Step[] {
-  const hasClaudeMd = getFsImplementation().existsSync(
-    join(getCwd(), 'CLAUDE.md'),
-  )
-  const isWorkspaceDirEmpty = isDirEmpty(getCwd())
-
-  return [
-    {
-      key: 'workspace',
-      text: 'Ask Claude to create a new app or clone a repository',
-      isComplete: false,
-      isCompletable: true,
-      isEnabled: isWorkspaceDirEmpty,
-    },
-    {
-      key: 'claudemd',
-      text: 'Run /init to create a CLAUDE.md file with instructions for Claude',
-      isComplete: hasClaudeMd,
-      isCompletable: true,
-      isEnabled: !isWorkspaceDirEmpty,
-    },
-  ]
-}
-
-export function isProjectOnboardingComplete(): boolean {
-  return getSteps()
-    .filter(({ isCompletable, isEnabled }) => isCompletable && isEnabled)
-    .every(({ isComplete }) => isComplete)
-}
+export {
+  getSteps,
+  isProjectOnboardingComplete,
+  type Step,
+} from './projectOnboardingSteps.js'
+import { isProjectOnboardingComplete } from './projectOnboardingSteps.js'
 
 export function maybeMarkProjectOnboardingComplete(): void {
   // Short-circuit on cached config — isProjectOnboardingComplete() hits