Describe the bug

For some reason, Vitest 4 sets the the Vite resolved config base setting to / when it should really be undefined. We thought we fixed this by ensuring the default Kit base path always matches the Vite default. Unfortunately, if you set a base path in svelte.config.js, they will end up differing again and you'll get a false-positive warning about an overridden config setting.

Reproduction

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Logs

System Info

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Severity

annoyance

Additional Information

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