VSCode Extension: Allow renaming conversation tabs

Feature Request

Is your feature request related to a problem?

In the VSCode extension, conversation tabs are named after the first message in the conversation. There is no way to rename them to something more meaningful.

For example, if my first message is "Is there a way to rename these chat sessions, rather than having the name be the first line of each chat" — that becomes the tab title, which is not useful for finding conversations later.

The CLI version has /conversations for managing sessions, but the VSCode extension doesn't expose a rename option.

Describe the solution you'd like

A way to rename conversation tabs in the VSCode extension — either via:

• A right-click context menu on the tab with a "Rename" option
• A /name <new name> slash command that works in the extension
• An inline edit (double-click to rename)

Describe alternatives you've considered

Starting each conversation with a short descriptive first line, but that's a workaround rather than a solution.

Additional context

Screenshot showing the issue:

• Tabs default to the first message text, which is often a full question rather than a concise label
• /name command is not recognized in the extension