Codex VS Code extension: rename chats and scope chat list to the current worktree/repository

Feature request

Please add two related improvements to the Codex VS Code extension:

1. Allow users to rename a chat/thread after it is created.
2. Scope the visible chat list to the current worktree or repository context, so chats from other worktrees/repos do not show up unless the user explicitly switches context.

Why this matters

In multi-worktree and monorepo workflows, generated chat titles are not enough to quickly find the right conversation. Being able to rename chats would make saved context easier to manage. Scoping the chat list to the active worktree/repository would reduce confusion and lower the chance of continuing the wrong thread.

Suggested behavior

• Provide a rename action in the chat list or thread header.
• Show the current worktree/repository association for each chat.
• Default the list to chats from the active worktree/repository only.
• Optionally offer a broader "all chats" view for users who want it.

If this is already possible behind a flag or setting, exposing it in the UI would still be useful.