fix(qq): use msg_type:2 with markdown wrapper for proper QQ markdown …

[zz6zz666]

…rendering

The old msg_type:0 (plain text) caused QQ to display raw markdown syntax instead of rendering it. The new QQ Bot API uses msg_type:2 with a markdown { content } wrapper for proper formatting, matching the official openclaw-qqbot reference implementation.

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Testing

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Checklist

Before submitting a Pull Request, please ensure the following:

• 🚨 This PR does not introduce breaking changes.
• All CI checks (GH Actions) pass.
• Documentation is updated as needed.
• Tests are updated or added as necessary.
• Code is well-commented, especially in complex areas.
• Git history is clean — commits are squashed to the minimum necessary.

[CLAassistant]

All committers have signed the CLA.

[laride]

Thanks for the PR! Could you please rebase this PR onto the latest master branch so we can continue processing it?

[Karasukaigan]

Setting the message type to 2 will cause the QQ and TIM desktop clients to be unable to display messages correctly:

My solution (#99) is to add a setting option on the frontend, allowing users to decide for themselves whether to display messages in Markdown format.

@zz6zz666 @laride

[laride]

We have already merged PR #99, which provides similar functionality in a more complete implementation, so we will close this PR.

Thank you for your contribution!