fix(picker): ship the dialog worker as the constrained ./worker artifact

The workspace files constraint keys worker bundles on the ./worker export
(lib/worker.cjs, the workflow-workerthread shape); the descriptive source
entry stays win32-dialog-worker.ts and tsdown renames the bundle.

packages/host/directory-picker-native/tsdown.config.ts

@@ -6,7 +6,9 @@ import { clientBundle } from '../../client/tsdown.client.ts'
 export default [
   ...clientBundle('@deepseek-ai/dsh-host-directory-picker-native', ['lib/types/index.js', 'lib/types/invariant.js']),
   {
-    entry: ['lib/types/win32-dialog-worker.js'],
+    // The artifact is lib/worker.cjs (the ./worker export the workspace
+    // constraint keys on), bundled from the descriptive source entry.
+    entry: { worker: 'lib/types/win32-dialog-worker.js' },
     outDir: 'lib',
     format: ['cjs'] as ['cjs'],
     platform: 'node' as const,