Feature Request: Rename sessions in VSCode sidebar

Currently, /rename and the session picker (with R to rename) only work in the terminal CLI, not in the VSCode extension sidebar.

It would be great to be able to rename sessions directly from the VSCode sidebar, e.g. via:

• A context menu (right-click) on sessions in the "Past Conversations" dropdown
• Support for the /rename slash command within the sidebar panel

Current workaround: Open the integrated terminal, run claude --resume, navigate to the session, and press R to rename. The renamed session then appears in the sidebar dropdown.