feat(server): make URLs with the same label more compact

[chenjiahan]

Summary

Track previous label to avoid duplicate labels in the printed URLs.

Before

After

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

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[Copilot]

Pull Request Overview

This PR improves the formatting of server URL output by eliminating duplicate labels when multiple URLs share the same label, making the display more compact and easier to read.

• Tracks the previous label to avoid printing duplicate labels consecutively
• Restructures the loop to only print labels when they differ from the previous one
• Refactors route iteration to use destructuring for cleaner code

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