Function select_conversation 

pub fn select_conversation(
    entries: Vec<SessionEntry>,
    manager: &ConversationManager,
    now: DateTime<Local>,
) -> Result<Option<ConversationHistory>>

Show the searchable resume picker and return the chosen conversation, or None if the user cancelled. now is injected so the relative-time labels are testable and match the caller’s clock.

Errors

Entering raw mode and the alternate screen, drawing, reading events, and restoring the terminal afterwards — plus a delete performed from inside the picker. An empty entries list and a user who cancels are both Ok(None). The terminal is restored before any error from the picker body is returned, so an Err never leaves the shell in raw mode.