Fix avatar display in tree views for GitHub Enterprise

[Copilot]

Avatar URLs on GitHub Enterprise Server are inaccessible to the extension, causing failed fetches and missing icons in PR/Issue tree views. Enterprise detection was working in editor webviews but not in tree nodes.

Changes

• Tree view nodes: Add isEnterprise check before avatar fetch attempts

  • pullRequestNode.ts: Extract _getAuthorIcon() helper to eliminate duplication
  • issuesView.ts: Check enterprise before rendering issue avatars
  • commitNode.ts: Check enterprise before rendering commit author avatars (fix iconPath type)
  • repositoryChangesNode.ts: Check enterprise before rendering PR author avatars

• Behavior: Enterprise remotes skip fetch and use github ThemeIcon immediately; non-enterprise unchanged

// Before: Always attempted fetch, failed for enterprise
this.iconPath = (await DataUri.avatarCirclesAsImageDataUris(context, [author], 16, 16))[0];

// After: Skip fetch for enterprise
if (pullRequest.githubRepository.remote.isEnterprise) {
    this.iconPath = new vscode.ThemeIcon('github');
} else {
    this.iconPath = (await DataUri.avatarCirclesAsImageDataUris(context, [author], 16, 16))[0];
}

Warning

Firewall rules blocked me from connecting to one or more addresses (expand for details)

I tried to connect to the following addresses, but was blocked by firewall rules:

• update.code.visualstudio.com
  • Triggering command: /opt/hostedtoolcache/node/20.20.0/x64/bin/node node ./out/src/test/runTests.js (dns block)

If you need me to access, download, or install something from one of these locations, you can either:

• Configure Actions setup steps to set up my environment, which run before the firewall is enabled
• Add the appropriate URLs or hosts to the custom allowlist in this repository's Copilot coding agent settings (admins only)

Original prompt

---

This section details on the original issue you should resolve

<issue_title>Avatar does not show in PR details page</issue_title>
<issue_description>

• Extension version: 0.122.0
• VSCode Version: 1.106.0
• OS: Windows 11 25H2
• Repository Clone Configuration (single repository/fork of an upstream repository): single repo
• GitHub Product (GitHub.com/GitHub Enterprise version): GHES 3.14.8

Steps to Reproduce:

1. Create a PR
2. Open PR details page in editor
3. Avatar is missing/replaced by placeholder

</issue_description>

<agent_instructions>Fix the icon not showing in the PRs and Issues views for enterprise.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

@alexr00 We can't load enterprise avatars. I will switch us to use placeholders. @TylerLeonhardt

looks like the tree views need the treatment still. The PR & Issue editors look good though (using the default GitHub icon)

That said, should they use the account codicon? I don't feel too strongly about it either way.</comment_new>

• Fixes Avatar does not show in PR details page #8152

---

💬 We'd love your input! Share your thoughts on Copilot coding agent in our 2 minute survey.