VS Code extension: option to resume most recent conversation on startup

Feature request

When opening a project in VS Code, the Claude Code extension always starts a fresh conversation. It would be useful to have a setting (e.g. claude.resumeLastConversation) that automatically resumes the most recent conversation for that workspace instead.

Motivation

Context continuity matters. When I close VS Code and reopen a project, I'm usually picking up where I left off. Having to manually find and resume the last conversation via the dropdown adds friction to what should be a seamless workflow.

Proposed behavior

• New setting: claude.resumeLastConversation (default: false)
• When enabled, opening a workspace loads the most recent conversation for that workspace instead of starting a new one
• If no prior conversation exists for the workspace, fall back to creating a new one
• The conversation dropdown remains available to switch conversations as usual