More tests for Copilot CLI and refactor permission handling

[DonJayamanne]

No description provided.

[Copilot]

Pull Request Overview

This PR refactors the CopilotCLI session permission handling architecture, moving from a centralized permission handler to a session-based approach. The changes improve modularity by allowing each session to manage its own permission requests through attached handlers, and add comprehensive test coverage for the new architecture.

Key Changes

• Refactored permission handling from global CopilotCLIPermissionsHandler class to session-level handlers via CopilotCLISessionOptions
• Added stream attachment mechanism to sessions, separating stream lifecycle from request handling
• Introduced comprehensive unit tests for CopilotCLI chat session participant
• Extracted UncommittedChangesStep constant to improve maintainability

Reviewed Changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 14 comments.

Show a summary per file

File	Description
src/extension/agents/copilotcli/node/copilotCli.ts	Removed CopilotCLIPermissionsHandler class and introduced CopilotCLISessionOptions interface with permission handler registration
src/extension/agents/copilotcli/node/copilotcliSession.ts	Added attachPermissionHandler and stream attachment methods; refactored handleRequest to remove stream parameter
src/extension/agents/copilotcli/node/copilotcliSessionService.ts	Updated session creation/retrieval to use new options interface; removed isEmpty tracking from session items
src/extension/agents/copilotcli/node/permissionHelpers.ts	Added requestPermission helper function to encapsulate permission request logic
src/extension/chatSessions/vscode-node/copilotCLIChatSessionsContribution.ts	Refactored request handling flow; replaced vscode.commands calls with IRunCommandExecutionService
src/extension/chatSessions/vscode-node/copilotCloudSessionsProvider.ts	Extracted UncommittedChangesStep constant for consistency
src/extension/chatSessions/vscode-node/test/copilotCLIChatSessionParticipant.spec.ts	New comprehensive test file covering participant request handling scenarios
src/extension/agents/copilotcli/node/test/copilotcliSession.spec.ts	Updated tests to reflect new permission handler and stream attachment APIs
src/extension/agents/copilotcli/node/test/copilotCliSessionService.spec.ts	Updated tests to work with new CopilotCLISessionOptions interface