Restore quick delete action in the sessions view

Describe the feature or problem you'd like to solve

The sessions list used to support deleting a session directly from the list (a quick delete/keyboard action on the highlighted row). That option is gone, and there is now no good way to delete sessions.

Proposed solution

• Re-add a delete action in the sessions view that operates on the highlighted session without opening it (e.g.  d  or  Del  key, with a confirmation prompt).
• Support deleting multiple sessions in one pass (multi-select, or stay in the list after each delete).
• Deleting from the list should not create a new session; the user should remain in the sessions view with the deleted entry removed.

Example prompts or workflows

No response

Additional context

The only remaining path is  /session delete , which has two significant problems:

1. It requires opening a session first. You must resume/enter a session before you can delete it, so cleaning up several stale sessions means repeatedly opening sessions you have no interest in.
2. It spawns a replacement session. After deleting, the CLI immediately creates a brand-new session. So deleting N sessions leaves you with N new empty sessions to clean up, which is extremely frustrating.

Beginne damit, die Sitzungsansicht und den bestehenden Befehl /session delete nachzuverfolgen, insbesondere wie die markierte Zeile, Tastaturaktionen, die Bestätigung und die Sitzungserstellung behandelt werden. Überprüfe zuerst den aktuellen Löschablauf. Erledigt ist die Aufgabe, wenn eine oder mehrere markierte Sitzungen aus der Liste gelöscht werden, ohne sie zu öffnen oder Ersatzsitzungen zu erstellen, und der Benutzer in der Sitzungsansicht bleibt.