get hidden chat terminal count to update

[meganrogge]

address #275789 in main

This specifically fixes the background terminal case, where onDidChangeInstances was not firing, so the entry would not get updated.

Also, the terminalTabbedView was not updated to only consider hidden instances.

[Copilot]

Pull Request Overview

This pull request refactors the logic for handling hidden chat terminals by centralizing the filtering logic within getToolSessionTerminalInstances(). The main goal is to improve code maintainability by eliminating duplicate logic for determining which chat terminals are hidden.

• Added an optional hiddenOnly parameter to getToolSessionTerminalInstances() to filter for hidden terminals
• Refactored callers to use the new parameter instead of duplicating filtering logic
• Fixed a menu visibility condition to use the correct context key

Reviewed Changes

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

Show a summary per file

File	Description
src/vs/workbench/contrib/terminalContrib/chat/browser/terminalChatService.ts	Added hiddenOnly parameter to getToolSessionTerminalInstances() and refactored _updateHasToolTerminalContextKeys() to use it
src/vs/workbench/contrib/terminalContrib/chat/browser/terminalChatActions.ts	Fixed menu visibility condition to use hasHiddenChatTerminals instead of hasChatTerminals
src/vs/workbench/contrib/terminal/browser/terminalTabsChatEntry.ts	Refactored to use new hiddenOnly parameter and replaced context key service with terminal service
src/vs/workbench/contrib/terminal/browser/terminalTabbedView.ts	Separated event listeners and updated to use hiddenOnly parameter for determining tab visibility
src/vs/workbench/contrib/terminal/browser/terminalService.ts	Added onDidChangeInstances event firing when creating instances
src/vs/workbench/contrib/terminal/browser/terminal.ts	Updated interface documentation to reflect new hiddenOnly parameter

Comments suppressed due to low confidence (1)

src/vs/workbench/contrib/terminal/browser/terminalTabbedView.ts:153

• Both event handlers execute identical code. Consider using Event.any() to combine these two event listeners into a single handler to reduce code duplication: this._register(Event.any(this._terminalChatService.onDidRegisterTerminalInstanceWithToolSession, this._terminalService.onDidChangeInstances)(() => { this._refreshShowTabs(); this._updateChatTerminalsEntry(); }));

		this._register(Event.any(this._terminalChatService.onDidRegisterTerminalInstanceWithToolSession, this._terminalService.onDidChangeInstances)(() => {
			this._refreshShowTabs();
			this._updateChatTerminalsEntry();
		}));

		this._register(contextKeyService.onDidChangeContext(e => {
			if (e.affectsSome(new Set(['hasHiddenChatTerminals']))) {
				this._refreshShowTabs();