Separate CTA widget from update title bar entry

[dmitrivMS]

This builds upon #308064 by @cwebster-99 to separate CTA widget from update title bar control and enrich support format to allow specifying custom buttons.

[github-actions]

Screenshot Changes

Base: 182bcf49 Current: f867ca33

Changed (1)

editor/inlineCompletions/other/JumpToHint/Dark

Before	After

[Copilot]

Pull request overview

This PR separates the post-update “What’s New” call-to-action (CTA) experience from the update title bar indicator, moving post-install content rendering into a standalone widget and introducing a parser for richer update-info payloads (markdown + custom buttons).

Changes:

• Added a new parseUpdateInfoInput utility to parse update-info payloads (JSON envelope or frontmatter) including optional button definitions.
• Removed post-install markdown rendering/version-change detection from the title bar update entry and tooltip.
• Introduced PostUpdateWidgetContribution to show a sticky hover widget after update installs, plus styling and a richer developer prompt for testing.

Show a summary per file

File	Description
src/vs/workbench/contrib/update/common/updateInfoParser.ts	New parsing utility for update info payloads supporting optional buttons.
src/vs/workbench/contrib/update/browser/updateTooltip.ts	Removes post-install markdown section/rendering from the tooltip.
src/vs/workbench/contrib/update/browser/updateTitleBarEntry.ts	Removes post-install/version-change logic so title bar entry focuses on update states only.
src/vs/workbench/contrib/update/browser/update.contribution.ts	Registers PostUpdateWidgetContribution and updates dev command prompt text.
src/vs/workbench/contrib/update/browser/postUpdateWidget.ts	New post-update widget shown via hover, fetching/parsing update info and rendering markdown/buttons.
src/vs/workbench/contrib/update/browser/media/postUpdateWidget.css	Styles for the new post-update widget hover content.

Copilot's findings

Comments suppressed due to low confidence (1)

src/vs/workbench/contrib/update/browser/postUpdateWidget.ts:184

• The click listeners added via dom.addDisposableListener aren't registered/disposed. When combined with a sticky hover that can be shown repeatedly, this risks retaining closures (services, args) longer than necessary. Please register these disposables (eg via a DisposableStore) and dispose them when the hover is closed (for example via the hover target's dispose).

				dom.addDisposableListener(button, 'click', () => {
					this.telemetryService.publicLog2<WorkbenchActionExecutedEvent, WorkbenchActionExecutedClassification>(
						'workbenchActionExecuted',
						{ id: commandId, from: 'postUpdateWidget' }
					);

					void this.commandService.executeCommand(commandId, ...(args ?? []));
					this.hoverService.hideHover(true);
				});

• Files reviewed: 7/7 changed files
• Comments generated: 4