Dropdown: filter IME Enter bug

Describe the bug

Pressing the Enter key to confirm a converted word in the Japanese IME causes the filter dialog to close unexpectedly.

This problem happen on Remix.
Vite is no problem.

Reproducer

https://stackblitz.com/edit/remix-run-remix-9ccvms25

System Information

System:
  OS: Windows 11 10.0.22621
  CPU: (16) x64 AMD Ryzen 7 9800X3D 8-Core Processor
  Memory: 44.36 GB / 61.59 GB
Binaries:
  Node: 20.15.0 - C:\Program Files\nodejs\node.EXE
  npm: 10.7.0 - C:\Program Files\nodejs\npm.CMD
  pnpm: 9.14.2 - C:\Program Files\nodejs\pnpm.CMD
Browsers:
  Edge: Chromium (131.0.2903.51)
  Internet Explorer: 11.0.22621.3527

Steps to reproduce the behavior

1. Click Dropdown
2. type おんせん
3. press space key (convert word)
4. press enter key (confirm convert word)
5. Dropdown closed unexpectedly.

Expected behavior

• Do not close Dropdown
  • Vite is no problem. idk why.
    • Reproducer

Possible solution

https://gist.github.com/CRC32EX/b05988bb96bf7910a25cad74f5a9c589/revisions

primereact/components/lib/dropdown/Dropdown.js

+ if (event.is_composing === false) {
+  onEnterKey(event);
+ }

Reference

• https://webfrontend.ninja/js-input-ime-enter/

Inspect primereact/components/lib/dropdown/Dropdown.js and use the provided Remix StackBlitz reproducer to trace how Enter is handled during IME composition. Compare it with the Vite reproducer and verify that confirming the Japanese conversion leaves the Dropdown open without breaking ordinary Enter behavior.