fix(ssh): the forwards panel is offered for live sessions only

A fifth site asking the same question the wrong way, missed on the first
pass because it spells the phase check inline rather than through the shape
the others used.

`connected_ssh` decides whether a pane gets the port-forwards panel, and it
asked the phase alone. So a pane whose SSH client had already exited still
offered to add forwards — over a link with nothing at the far end to carry
them, on a panel whose whole subject is a connection that is gone.

Now the same `ssh_session_live()` as the other four.

Checked the remaining phase readers while here: the status strip and the tab
dot both go through `ssh_disconnected()` and already account for it, and
`ssh_prompt` only records the phase for display.

src/ui/right_panel.rs

@@ -706,10 +706,7 @@ impl Tty7App {
                 let connected_ssh = view
                     .remote_context()
                     .is_some_and(|c| c.kind == crate::daemon::protocol::RemoteKind::NativeSsh)
-                    && matches!(
-                        view.ssh_phase(),
-                        Some(crate::daemon::protocol::SshPhase::Connected)
-                    );
+                    && view.ssh_session_live();
                 if connected_ssh || view.workspace().is_some() {
                     forwards_pane = Some(view.pane_id);
                 }