fix: Astro v5 with new API cause image covers to not load

[CuteLeaf]

Fix #483， Astro v5 with new API cause image covers to not load

I don't know if it's the best solution, but it already shows the cover normally.

Type of change

• Bug fix (a non-breaking change that fixes an issue)
• New feature (a non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Other (please describe):

Checklist

• I have read the CONTRIBUTING document.
• I have checked to ensure that this Pull Request is not for personal changes.
• I have performed a self-review of my own code.
• My changes generate no new warnings.

Related Issue

#483

Changes

export function getFileDirFromPath(filePath: string): string {
	return filePath.replace(/^src\//, '').replace(/\/[^\/]+$/, '');
}

Screenshots (if applicable)

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[CuteLeaf]

@L4Ph @saicaca