[Feature Request] WeChat approval prompts should support Chinese approve/deny actions

## Summary

Following the fix for #6695 (WeChat can now receive approval notifications and process actions), the approval interaction in the WeChat channel still appears to use English action labels (e.g. "Approve" / "Deny"). For Chinese-speaking users, it would be much clearer if the approval prompt supported Chinese actions ("允许" / "拒绝") as well.

## Suggestion

- Allow the WeChat approval notification/card to use Chinese action labels (e.g. "允许" / "拒绝"), or
- Make the action labels follow the channel/user language setting, or
- Accept both English and Chinese keywords in chat-based approval replies (e.g. replying "允许" works the same as "Approve").

## Context

- QwenPaw channel: WeChat (iLink)
- The user's primary language is Chinese; English-only action labels in the approval flow are a UX barrier, especially for operators who interact exclusively through WeChat.

Thanks for considering this localization improvement!