The chat-delete dialog required typing the chat name to confirm
deletion. Single-user app — typing friction is annoying, not safety.
Match the archive dialog pattern in SettingsPane.tsx: title +
description naming the chat in mono font, plain Cancel + destructive
Delete button.
Removes the deleteInput state, deleteExpected / deleteEnabled
deriveds, the <Input> field, and its lone <Input> import.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>