Keep network inspector at top or bottom if scrolled to end

[amandeep-oai]

Summary

• When the user is looking at the top/bottom in reverse-chron/chron sort, respectively, when new network requests come in, we should stay at the top/bottom so we can see the new request without having to scroll.
• When the user isn't at the top or bottom, then no change in behavior.

Testing

• Built and ran Snap-O locally
• Added or updated tests (if applicable)

Checklist

• I have read the Contributing guidelines
• Documentation has been updated (if needed)

[Copilot]

Pull request overview

This PR implements automatic scroll position maintenance in the Network Inspector sidebar, ensuring that when users are viewing the most recent items (top in reverse-chronological sort or bottom in chronological sort), the view automatically scrolls to keep new network requests visible as they arrive.

Key Changes:

• Adds scroll position tracking to detect when the user is viewing the top or bottom of the list
• Implements automatic scrolling behavior when new network requests arrive and the user is at the relevant edge
• Refactors placeholder text logic for better code organization

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[chatgpt-codex-connector]

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[amandeep-oai]

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[Copilot]

Pull request overview

Copilot reviewed 2 out of 2 changed files in this pull request and generated no new comments.

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[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. Keep it up!

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Codex can also answer questions or update the PR. Try commenting "@codex address that feedback".