remove creating session in beginning

[sandy081]

No description provided.

[Copilot]

Pull request overview

This PR removes premature session creation in the Agent Sessions window by eliminating the createNewPendingSession method and refactoring LocalNewSession and RemoteNewSession to accept a URI directly instead of an IActiveSessionItem. The change implements a fully deferred session creation pattern where chat sessions are only created when the user sends their first request.

Changes:

• Removed createNewPendingSession method that was eagerly creating chat sessions before user interaction
• Refactored LocalNewSession and RemoteNewSession to accept URI resources directly instead of IActiveSessionItem
• Simplified createNewSessionForTarget to construct new session objects without creating the underlying chat session

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
src/vs/sessions/contrib/sessions/browser/sessionsManagementService.ts	Removed createNewPendingSession method and updated createNewSessionForTarget to pass URI directly to LocalNewSession/RemoteNewSession constructors
src/vs/sessions/contrib/chat/browser/newSession.ts	Updated LocalNewSession and RemoteNewSession constructors to accept URI instead of IActiveSessionItem, removed unused import, and made resource a direct property instead of deriving it from activeSessionItem