fix: move tool checks before tea.ExecProcess to fix namespace selection

cmd/kctl-tui/full.go

@@ -192,6 +192,14 @@ func (m *fullModel) handleSelect() (tea.Model, tea.Cmd) {
 
 	case screenNamespace:
 		m.selectedNamespace = item.value
+		if err := kubeexec.CheckTool("tmux"); err != nil {
+			m.err = err
+			return m, nil
+		}
+		if err := kubeexec.CheckTool("k9s"); err != nil {
+			m.err = err
+			return m, nil
+		}
 		return m, m.startTmuxSession()
 	}
 	return m, nil
@@ -257,15 +265,7 @@ func (m *fullModel) loadNamespacesFor(teamValue string) tea.Cmd {
 // configured envs, resolved via the context template, so both are
 // visible side by side.
 func (m *fullModel) startTmuxSession() tea.Cmd {
-	return func() tea.Msg {
+	selfPath := "kctl-tui"
-		if err := kubeexec.CheckTool("tmux"); err != nil {
-			return errMsg{err}
-		}
-		if err := kubeexec.CheckTool("k9s"); err != nil {
-			return errMsg{err}
-		}
-
-		selfPath := "kctl-tui" // resolved via PATH; see README for install instructions
 	panelCmd := fmt.Sprintf("%s panel --context=%s --ns=%s --team=%s",
 		selfPath, m.selectedContext, m.selectedNamespace, m.selectedTeam)
 
@@ -299,7 +299,6 @@ func (m *fullModel) startTmuxSession() tea.Cmd {
 		return tmuxDoneMsg{err: err}
 	})
 }
-}
 
 func (m *fullModel) View() string {
 	view := m.list.View()