Add commands to chat agent input group options

[DonJayamanne]

[DonJayamanne]

@osortega /cc

[Copilot]

Pull request overview

This pull request adds support for custom commands in chat agent input group options, allowing extensions to display additional commands at the bottom of the option group picker UI.

Changes:

• Added commands property to the VS Code API ChatSessionProviderOptionGroup interface for extensibility
• Created internal IChatSessionProviderOptionGroupCommand interface to represent commands
• Updated visibility logic to consider commands when determining if an option group should be shown
• Implemented command rendering in the picker UI with proper separation from option items

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/vscode-dts/vscode.proposed.chatSessionsProvider.d.ts	Added commands property to API interface for option groups
src/vs/workbench/contrib/chat/common/chatSessionsService.ts	Defined internal command interface and added commands to option group interface
src/vs/workbench/contrib/chat/browser/widget/input/chatInputPart.ts	Updated visibility check to include commands when determining if group has items
src/vs/workbench/contrib/chat/browser/chatSessions/searchableOptionPickerActionItem.ts	Added ICommandService dependency injection
src/vs/workbench/contrib/chat/browser/chatSessions/chatSessionPickerActionItem.ts	Implemented command rendering with proper separator and command execution

Comments suppressed due to low confidence (1)

src/vs/workbench/contrib/chat/browser/chatSessions/chatSessionPickerActionItem.ts:118

• This comment duplicates information from the parent comment (line 105). Since it's directly adjacent to the conditional logic that implements the separation, consider either:

1. Removing this comment as the logic is self-explanatory with the parent comment, or
2. Making it more specific: "Separator appears only when there are both items and commands"

					// Use category to create a separator before commands (only if there are options)
					category: addSeparator ? { label: '', order: Number.MAX_SAFE_INTEGER } : undefined,