uninstall the plugin, but the plugin package is not removed

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Versions

1. dify-plugin-daemon Version
2. dify-api Version

Describe the bug

https://github.com/user-attachments/assets/53070596-e947-4d39-a0fa-0948c9cd3825

To Reproduce
Steps to reproduce the behavior:

1. Go to '...'
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
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Additional context
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Start by reproducing the plugin uninstall flow described in the issue and trace where the plugin package is handled. Confirm the expected removal behavior and identify the relevant Go entry point and tests; done means uninstalling a plugin also removes its package.