feat: Better support for Japanese/ Chinese keyboard

[hiro-v]

Problem

• Context: https://discord.com/channels/1107178041848909847/1223957838678724650/1223957838678724650
• Jan app currently does not support nicely for JP/ CN language while LLM is all about language
• This has negative effect to Jan goal for DAU

Success Criteria

• Allow users with those languages to seamlessly use Jan app
• How to reproduce:
  • Mac -> Language -> Add JP keyboard
  • Enable JP hiragana keyboard
  • Type watashi -> It will show わたし as suggestion. Normally user have to choose by using number then enter, but Enter here in Jan refers to submit message which is not intended

Additional context

• Check this for reference of implementation: https://dninomiya.github.io/form-guide/stop-enter-submit

[zhhanging]

In the inputEvent and keyboardEvent, there is an isComposing property, which can be used to determine whether the user is in input method's composing stage when triggering the input / keyboard event. https://developer.mozilla.org/en-US/docs/Web/API/InputEvent/isComposing. I think this will be an easy fix using this property. I could make a pr, but this issue is already assigned to imtuyethan. She will probably fix this soon.

[Van-QA]

Hi @zhhanging, please help us with the PR if possible 👍 (and link the PR to this ticket) We value the help from contributors a lot. Any ticket that you want, you can pick it up, you only need to change the assignee, and put a comment. 🙏

[Van-QA]

Many thank to the help of @zhhanging, the issue is now resolved as of Jan v0.4.10-368 ✅