Fix avatar display in tree views for GitHub Enterprise

- Add enterprise detection in PR tree views
- Use github ThemeIcon placeholder for enterprise instead of fetching avatars
- Update pullRequestNode, issuesView, commitNode, and repositoryChangesNode

Co-authored-by: alexr00 <38270282+alexr00@users.noreply.github.com>

Author: Copilot

src/issues/issuesView.ts

@@ -101,10 +101,15 @@ export class IssuesTreeData
 		}
 
 		if (avatarUser) {
-			treeItem.iconPath = (await DataUri.avatarCirclesAsImageDataUris(this.context, [avatarUser], 16, 16))[0] ??
-				(element.isOpen
-					? new vscode.ThemeIcon('issues', new vscode.ThemeColor('issues.open'))
-					: new vscode.ThemeIcon('issue-closed', new vscode.ThemeColor('github.issues.closed')));
+			// For enterprise, use placeholder icon instead of trying to fetch avatar
+			if (element.githubRepository.remote.isEnterprise) {
+				treeItem.iconPath = new vscode.ThemeIcon('github');
+			} else {
+				treeItem.iconPath = (await DataUri.avatarCirclesAsImageDataUris(this.context, [avatarUser], 16, 16))[0] ??
+					(element.isOpen
+						? new vscode.ThemeIcon('issues', new vscode.ThemeColor('issues.open'))
+						: new vscode.ThemeIcon('issue-closed', new vscode.ThemeColor('github.issues.closed')));
+			}
 		} else {
 			// Use GitHub codicon when assignee setting is selected but no assignees exist
 			treeItem.iconPath = new vscode.ThemeIcon('github');

src/view/treeNodes/commitNode.ts

@@ -40,8 +40,13 @@ export class CommitNode extends TreeNode implements vscode.TreeItem {
 
 	async getTreeItem(): Promise<vscode.TreeItem> {
 		if (this.commit.author) {
-			const author: IAccount = { id: this.commit.author.node_id, login: this.commit.author.login, url: this.commit.author.url, avatarUrl: this.commit.author.avatar_url, accountType: this.commit.author.type as AccountType };
-			this.iconPath = (await DataUri.avatarCirclesAsImageDataUris(this.pullRequestManager.context, [author], 16, 16))[0];
+			// For enterprise, use placeholder icon instead of trying to fetch avatar
+			if (this.pullRequest.githubRepository.remote.isEnterprise) {
+				this.iconPath = new vscode.ThemeIcon('github');
+			} else {
+				const author: IAccount = { id: this.commit.author.node_id, login: this.commit.author.login, url: this.commit.author.url, avatarUrl: this.commit.author.avatar_url, accountType: this.commit.author.type as AccountType };
+				this.iconPath = (await DataUri.avatarCirclesAsImageDataUris(this.pullRequestManager.context, [author], 16, 16))[0];
+			}
 		}
 		return this;
 	}

src/view/treeNodes/pullRequestNode.ts

@@ -274,6 +274,10 @@ export class PRNode extends TreeNode implements vscode.CommentingRangeProvider2
 		const copilotWorkingStatus = await this.pullRequestModel.copilotWorkingStatus();
 		const theme = this._folderReposManager.themeWatcher.themeData;
 		if (copilotWorkingStatus === CopilotWorkingStatus.NotCopilotIssue) {
+			// For enterprise, use placeholder icon instead of trying to fetch avatar
+			if (this.pullRequestModel.githubRepository.remote.isEnterprise) {
+				return new vscode.ThemeIcon('github');
+			}
 			return (await DataUri.avatarCirclesAsImageDataUris(this._folderReposManager.context, [this.pullRequestModel.author], 16, 16))[0]
 				?? new vscode.ThemeIcon('github');
 		}
@@ -294,6 +298,10 @@ export class PRNode extends TreeNode implements vscode.CommentingRangeProvider2
 					dark: DataUri.copilotErrorAsImageDataURI(getIconForeground(theme, 'dark'), getListErrorForeground(theme, 'dark'))
 				};
 			default:
+				// For enterprise, use placeholder icon instead of trying to fetch avatar
+				if (this.pullRequestModel.githubRepository.remote.isEnterprise) {
+					return new vscode.ThemeIcon('github');
+				}
 				return (await DataUri.avatarCirclesAsImageDataUris(this._folderReposManager.context, [this.pullRequestModel.author], 16, 16))[0]
 					?? new vscode.ThemeIcon('github');
 		}

src/view/treeNodes/repositoryChangesNode.ts

@@ -111,7 +111,12 @@ export class RepositoryChangesNode extends TreeNode implements vscode.TreeItem {
 
 	override async getTreeItem(): Promise<vscode.TreeItem> {
 		this.setLabel();
-		this.iconPath = (await DataUri.avatarCirclesAsImageDataUris(this._pullRequestManager.context, [this.pullRequestModel.author], 16, 16))[0];
+		// For enterprise, use placeholder icon instead of trying to fetch avatar
+		if (this.pullRequestModel.githubRepository.remote.isEnterprise) {
+			this.iconPath = new vscode.ThemeIcon('github');
+		} else {
+			this.iconPath = (await DataUri.avatarCirclesAsImageDataUris(this._pullRequestManager.context, [this.pullRequestModel.author], 16, 16))[0];
+		}
 		this.description = undefined;
 		if (this.parent.children?.length && this.parent.children.length > 1) {
 			const allSameOwner = this.parent.children.every(child => {