[Bug]: 取消付费 改为捐赠！！！

Bug type

Regression (worked before, now fails)

Beta release blocker

No

Summary

不要再设付费功能，可以设置通过捐赠达到一定数额，在设置页展示等

Steps to reproduce

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Expected behavior

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Actual behavior

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OpenClaw version

Latest

Operating system

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Install method

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Model

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Provider / routing chain

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Additional provider/model setup details

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Logs, screenshots, and evidence

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Impact and severity

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Additional information

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