fix: when user gold is negative, free plugins is also blocked

[noahzark]

某种情况下（历史数据迁移、主动扣除金币），当用户金币为负数时，即使是免费插件也无法使用

Summary by Sourcery

错误修复：

• 修复了免费插件因用户金币余额为负而被阻止的问题。

Original summary in English

Summary by Sourcery

Bug Fixes:

• Fix issue where free plugins were blocked for users with negative gold balance.

[sourcery-ai]

审核者指南 by Sourcery

此拉取请求修复了一个错误，当用户的金币余额为负时，免费插件被阻止。此更改修改了检查用户是否有足够金币使用插件的条件。

未生成图表，因为更改看起来简单，不需要视觉表示。

文件级更改

更改	详情	文件
修改了检查用户是否有足够金币使用插件的条件	添加了一个额外的检查，以确保插件的费用大于0 这允许即使用户的金币余额为负时也能使用免费插件（cost_gold = 0）	zhenxun/builtin_plugins/hooks/_auth_checker.py

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Original review guide in English

Reviewer's Guide by Sourcery

This pull request fixes a bug where free plugins were blocked when a user's gold balance was negative. The change modifies the condition for checking if a user has enough gold to use a plugin.

No diagrams generated as the changes look simple and do not need a visual representation.

File-Level Changes

Change	Details	Files
Modified the condition for checking if a user has enough gold to use a plugin	Added an additional check to ensure the plugin's cost is greater than 0 This allows free plugins (cost_gold = 0) to be used even when the user's gold balance is negative	zhenxun/builtin_plugins/hooks/_auth_checker.py

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[sourcery-ai]

嗨 @noahzark - 我已经审查了你的更改 - 这里有一些反馈：

总体评论：

• 考虑审查黄金余额系统的整体设计。虽然这个修复解决了当前的问题，但允许负余额或基于黄金数量阻止访问可能会有更广泛的影响，可以通过更全面的方式解决。

这是我在审查期间查看的内容

• 🟢 一般问题：一切看起来都很好
• 🟢 安全性：一切看起来都很好
• 🟢 测试：一切看起来都很好
• 🟢 复杂性：一切看起来都很好
• 🟢 文档：一切看起来都很好

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Original comment in English

Hey @noahzark - I've reviewed your changes - here's some feedback:

Overall Comments:

• Consider reviewing the overall design of the gold balance system. While this fix addresses the immediate issue, there might be broader implications of allowing negative balances or blocking access based on gold amounts that could be addressed in a more comprehensive manner.

Here's what I looked at during the review

• 🟢 General issues: all looks good
• 🟢 Security: all looks good
• 🟢 Testing: all looks good
• 🟢 Complexity: all looks good
• 🟢 Documentation: all looks good

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