fix(windows): drain native coverage lifecycles

packages/host/directory-picker-auto/tests/loader-composition.spec.ts

@@ -22,6 +22,23 @@ import BrowseDirectoryPicker from '@deepseek-ai/dsh-host-directory-picker-browse
 import NativeDirectoryPicker from '@deepseek-ai/dsh-host-directory-picker-native'
 import * as DirectoryPickerAuto from '../src/index.ts'
 
+const renameControl = vi.hoisted(() => ({ attempts: 0, remainingFailures: 0 }))
+
+vi.mock('node:fs/promises', async (importOriginal) => {
+  const actual = await importOriginal<typeof import('node:fs/promises')>()
+  return {
+    ...actual,
+    async rename(oldPath: string, newPath: string): Promise<void> {
+      renameControl.attempts++
+      if (renameControl.remainingFailures > 0) {
+        renameControl.remainingFailures--
+        throw Object.assign(new Error(`transient rename failure for ${newPath}`), { code: 'EPERM' })
+      }
+      await actual.rename(oldPath, newPath)
+    },
+  }
+})
+
 const AUTO = '@deepseek-ai/dsh-host-directory-picker-auto'
 const NATIVE = '@deepseek-ai/dsh-host-directory-picker-native'
 const BROWSE = '@deepseek-ai/dsh-host-directory-picker-browse'
@@ -41,6 +58,8 @@ afterEach(async () => {
   }
   root = undefined
   fakeBin = undefined
+  renameControl.attempts = 0
+  renameControl.remainingFailures = 0
 })
 
 /** Write a two-row cordis.yml (webserver + chooser), then boot it through the real Loader. */
@@ -163,9 +182,11 @@ describe('real Loader composition', () => {
     const backendEntry = [...ctx.loader.entries()].find(entry => entry.options.name === NATIVE)!
     await ctx.loader.remove(backendEntry.id)
     const autoEntry = [...ctx.loader.entries()].find(entry => entry.options.name === AUTO)!
+    renameControl.remainingFailures = 1
     await expect(autoEntry.fiber!.dispose()).resolves.not.toThrow()
     expect(entryNames(ctx)).not.toContain(NATIVE)
     // Same self-dispose persistence as above: let the write land before teardown.
     await expect.poll(async () => await readFile(configPath, 'utf8')).toContain('disabled: true')
+    expect(renameControl.attempts).toBe(2)
   })
 })