SCM - consistently render date on the right in the repositories view

[lszomoru]

Fixes #280608

[Copilot]

Pull request overview

This PR improves the consistency of date rendering in the SCM repositories view by moving timestamps from artifact descriptions to a dedicated right-aligned column. This addresses issue #280608.

Key Changes:

• Added optional timestamp field to SCM artifact interfaces across API surface and internal implementations
• Implemented visual timestamp rendering with smart hiding of duplicate timestamps for artifacts in the same folder/group
• Extracted timestamp logic from Git artifact descriptions to dedicated timestamp field

Reviewed changes

Copilot reviewed 5 out of 6 changed files in this pull request and generated 2 comments.

Show a summary per file

File	Description
src/vscode-dts/vscode.proposed.scmArtifactProvider.d.ts	Added optional timestamp property to SourceControlArtifact API
src/vs/workbench/contrib/scm/common/artifact.ts	Added timestamp to ISCMArtifact and hideTimestamp flag to SCMArtifactTreeElement
src/vs/workbench/contrib/scm/browser/scmRepositoriesViewPane.ts	Implemented timestamp rendering with duplicate detection logic for folder-grouped and flat artifact lists
src/vs/workbench/contrib/scm/browser/media/scm.css	Added styling for timestamp container with visual treatment for duplicates (vertical line) and hover behavior
src/vs/workbench/api/common/extHost.protocol.ts	Added timestamp to SCMArtifactDto interface for extension host protocol
extensions/git/src/artifactProvider.ts	Modified to provide timestamp from Git commit dates and removed timestamp from artifact descriptions

[Copilot]

The variable name artifactBasename is misleading. Based on the logic, this extracts the directory path (everything before the last '/'), not the basename. Consider renaming it to artifactDirectory or artifactDirPath for clarity.

Suggested change

	const artifactBasename = artifact.id.lastIndexOf('/') > 0
	? artifact.id.substring(0, artifact.id.lastIndexOf('/'))
	: artifact.id;
	const prevArtifact = index > 0 ? artifacts[index - 1] : undefined;
	const prevArtifactBasename = prevArtifact && prevArtifact.id.lastIndexOf('/') > 0
	? prevArtifact.id.substring(0, prevArtifact.id.lastIndexOf('/'))
	: prevArtifact?.id;
	const hideTimestamp = index > 0 &&
	artifact.timestamp !== undefined &&
	prevArtifact?.timestamp !== undefined &&
	artifactBasename === prevArtifactBasename &&
	const artifactDirectory = artifact.id.lastIndexOf('/') > 0
	? artifact.id.substring(0, artifact.id.lastIndexOf('/'))
	: artifact.id;
	const prevArtifact = index > 0 ? artifacts[index - 1] : undefined;
	const prevArtifactDirectory = prevArtifact && prevArtifact.id.lastIndexOf('/') > 0
	? prevArtifact.id.substring(0, prevArtifact.id.lastIndexOf('/'))
	: prevArtifact?.id;
	const hideTimestamp = index > 0 &&
	artifact.timestamp !== undefined &&
	prevArtifact?.timestamp !== undefined &&
	artifactDirectory === prevArtifactDirectory &&

[Copilot]

The variable name prevArtifactBasename is misleading. Based on the logic, this extracts the directory path (everything before the last '/'), not the basename. Consider renaming it to prevArtifactDirectory or prevArtifactDirPath for clarity.

Suggested change

	const artifactBasename = artifact.id.lastIndexOf('/') > 0
	? artifact.id.substring(0, artifact.id.lastIndexOf('/'))
	: artifact.id;
	const prevArtifact = index > 0 ? artifacts[index - 1] : undefined;
	const prevArtifactBasename = prevArtifact && prevArtifact.id.lastIndexOf('/') > 0
	? prevArtifact.id.substring(0, prevArtifact.id.lastIndexOf('/'))
	: prevArtifact?.id;
	const hideTimestamp = index > 0 &&
	artifact.timestamp !== undefined &&
	prevArtifact?.timestamp !== undefined &&
	artifactBasename === prevArtifactBasename &&
	const artifactDirectory = artifact.id.lastIndexOf('/') > 0
	? artifact.id.substring(0, artifact.id.lastIndexOf('/'))
	: artifact.id;
	const prevArtifact = index > 0 ? artifacts[index - 1] : undefined;
	const prevArtifactDirectory = prevArtifact && prevArtifact.id.lastIndexOf('/') > 0
	? prevArtifact.id.substring(0, prevArtifact.id.lastIndexOf('/'))
	: prevArtifact?.id;
	const hideTimestamp = index > 0 &&
	artifact.timestamp !== undefined &&
	prevArtifact?.timestamp !== undefined &&
	artifactDirectory === prevArtifactDirectory &&