fix organize agent's history messages without recalculating tokens

[zeroameli]

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes #2932

Add token recalculation when organize agent's history messages.

Type of Change

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• [ ] Bug fix (non-breaking change which fixes an issue)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

• [ ] Tested locally

Suggested Checklist:

• [ ] I have performed a self-review of my own code
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] My changes generate no new warnings

[zeroameli]

@Yeuoly The code is updated, please have a review.

[Yeuoly]

Thanks for your contributions!