Agents: Indent chat session list items

[hawkticehurst]

Fixes #320002

Adds another 6px of left padding to chat session list items to improve hierarchy/scannability and create a clearer parent-child relationship between sessions and workspaces.

[Copilot]

Pull request overview

Adjusts the Agents window sessions list styling to improve visual hierarchy by indenting chat session items relative to their workspace/section headers.

Changes:

• Increase left padding on .session-item to add additional indentation for session list rows.

Comments suppressed due to low confidence (1)

src/vs/sessions/contrib/sessions/browser/media/sessionsList.css:98

• With the increased left padding on .session-item, the .session-item.sticky rule now overrides it with padding-left: 4px, so sticky sessions won’t be indented like the rest (and may even appear less-indented than section headers). That seems to contradict the goal of making all session items visually subordinate to the workspace/section header.

	padding: 8px 6px 8px 12px;

	&.archived {
		color: var(--vscode-descriptionForeground);
	}