Fix Safari Compatibility Issue: Replace URL.parse Method in llama-server UI

[0x4139]

The URL.parse method is not available in all browsers, particularly Safari, which causes the UI interface for llama-server to break. This pull request replaces the URL.parse method with the new URL() constructor to ensure compatibility across all browsers. Using new URL() provides a more standardized and widely supported way to parse URLs, resolving the issue with Safari and improving overall browser compatibility.

Fixes #8631

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[0x4139]

Do you think this is this related to #8631?

Yes, one of the users mentions that the web UI works on chromium, so it's definitely a compatibility issue. It also seems that the bug was introduced in #8552