fix: sshCmd closure bug + error display

CRITICAL BUG: sshConnectCmd wrapped tea.ExecProcess inside an extra
closure, so Bubble Tea never executed the SSH process — Enter appeared
to do nothing.

Fix:
- sshConnectCmd now returns tea.ExecProcess directly (no extra closure)
- tea.ExecProcess handles all process lifecycle (start, PTY, exit)
- sshExitMsg errors are shown in host list view (ErrorStyle)
- Error routed via Model.Error → HostListTab.err → View()

pkg/tui/tui.go

@@ -65,6 +65,9 @@ func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		return m, sshConnectCmd(msg.host, m.dataDir)
 
 	case sshExitMsg:
+		if msg.err != nil {
+			m.Error = msg.err
+		}
 		return m, nil
 
 	case openHostFormMsg:
@@ -203,6 +206,14 @@ func (m *Model) View() string {
 		return "No tabs open. Press 'q' to quit.\n"
 	}
 
+	// Pass error to host list tab for display
+	if m.Error != nil {
+		if ht := FindHostListTab(m.tabs.tabs); ht != nil {
+			ht.err = m.Error
+		}
+		m.Error = nil
+	}
+
 	return m.tabs.View()
 }