fix: config error handling, stderr separation, single-env pane, namespace sort

.gitignore

@@ -1,8 +1,8 @@
 # Binaries
 /bin/
 /dist/
-kctl-tui
-kctl-tui.exe
+/kctl-tui
+/kctl-tui.exe
 
 # Go
 *.test

cmd/kctl-tui/full.go

@@ -3,6 +3,7 @@ package main
 import (
 	"fmt"
 	"os/exec"
+	"sort"
 
 	tea "github.com/charmbracelet/bubbletea"
 	"github.com/charmbracelet/bubbles/list"
@@ -235,6 +236,7 @@ func (m *fullModel) loadNamespacesFor(teamValue string) tea.Cmd {
 			for ns := range m.namespaces {
 				names = append(names, ns)
 			}
+			sort.Strings(names)
 		} else {
 			names = namespacesForLabelValue(m.namespaces, m.cfg.TeamLabelKey, teamValue)
 		}
@@ -257,26 +259,31 @@ func (m *fullModel) startTmuxSession() tea.Cmd {
 		selfPath, m.selectedContext, m.selectedNamespace, m.selectedTeam)
 
 	envA := m.cfg.Envs[0]
-	envB := m.cfg.Envs[0]
-	if len(m.cfg.Envs) > 1 {
-		envB = m.cfg.Envs[1]
-	}
 	ctxA := m.cfg.ResolveContext(envA, m.selectedContext)
-	ctxB := m.cfg.ResolveContext(envB, m.selectedContext)
-
 	k9sCmdA := fmt.Sprintf("k9s --context %s -n %s", ctxA, m.selectedNamespace)
-	k9sCmdB := fmt.Sprintf("k9s --context %s -n %s", ctxB, m.selectedNamespace)
 
-	c := exec.Command("tmux", "new-session", "-d", "-s", "kctl",
+	args := []string{
+		"new-session", "-d", "-s", "kctl",
 		panelCmd, ";",
 		"set-option", "-t", "kctl", "remain-on-exit", "on", ";",
 		"split-window", "-v", "-t", "kctl:0.0", k9sCmdA, ";",
-		"split-window", "-v", "-t", "kctl:0.1", k9sCmdB, ";",
+	}
+	if len(m.cfg.Envs) > 1 {
+		envB := m.cfg.Envs[1]
+		ctxB := m.cfg.ResolveContext(envB, m.selectedContext)
+		k9sCmdB := fmt.Sprintf("k9s --context %s -n %s", ctxB, m.selectedNamespace)
+		args = append(args,
+			"split-window", "-v", "-t", "kctl:0.1", k9sCmdB, ";",
+		)
+	}
+	args = append(args,
 		"select-layout", "-t", "kctl", "even-vertical", ";",
 		"select-pane", "-t", "kctl:0.0", ";",
 		"attach", "-t", "kctl",
 	)
 
+	c := exec.Command("tmux", args...)
+
 	return tea.ExecProcess(c, func(err error) tea.Msg {
 		return tmuxDoneMsg{err: err}
 	})

cmd/kctl-tui/panel.go

@@ -76,13 +76,18 @@ func newPanelModel(context, ns, team string) *panelModel {
 	ti.Focus()
 
 	cfgPath, _ := config.DefaultPath()
-	cfg, _ := config.Load(cfgPath)
+	cfg, loadErr := config.Load(cfgPath)
 
 	l := list.New(nil, list.NewDefaultDelegate(), 0, 0)
 	l.SetShowStatusBar(false)
 
 	m := &panelModel{context: context, ns: ns, team: team, cfg: cfg, step: stepEnvMenu, list: l, input: ti}
-	m.showEnvMenu()
+	if loadErr != nil {
+		m.err = fmt.Errorf("config load failed: %w", loadErr)
+		m.step = stepError
+	} else {
+		m.showEnvMenu()
+	}
 	return m
 }
 

internal/kubeexec/kubeexec.go

@@ -20,11 +20,21 @@ import (
 
 func runOutput(name string, args ...string) (string, error) {
 	cmd := exec.Command(name, args...)
-	out, err := cmd.CombinedOutput()
+	var stdout, stderr strings.Builder
+	cmd.Stdout = &stdout
+	cmd.Stderr = &stderr
+	err := cmd.Run()
 	if err != nil {
-		return "", fmt.Errorf("%s %s failed: %w\n%s", name, strings.Join(args, " "), err, string(out))
+		msg := fmt.Sprintf("%s %s failed: %v", name, strings.Join(args, " "), err)
+		if s := strings.TrimSpace(stderr.String()); s != "" {
+			msg += "\n" + s
+		}
+		if s := strings.TrimSpace(stdout.String()); s != "" {
+			msg += "\n" + s
+		}
+		return "", fmt.Errorf("%s", msg)
 	}
-	return strings.TrimSpace(string(out)), nil
+	return strings.TrimSpace(stdout.String()), nil
 }
 
 // kubectlArgs prepends a --context flag when context is non-empty.