fix(tui): use LineInfo().Height for textarea growth; add version to header

- Fix textarea auto-grow: was using LineCount() which returns logical
  lines (always 1 with InsertNewline disabled). Now uses
  LineInfo().Height which returns the visual wrapped row count —
  the correct bubbles API for this purpose.
- Add version to TUI header: "Glean CLI  v0.6.1" (omitted for dev builds)
  Pass version through New() constructor rather than a separate setter.

Co-Authored-By: Claude Sonnet 4.6 (1M context) <[email protected]>

Author: scalvert

cmd/root.go

@@ -90,7 +90,7 @@ func NewCmdRoot() *cobra.Command {
 				}
 			}
 
-			model, err := tui.New(cfg, session, identity, cmd.Context())
+			model, err := tui.New(cfg, session, identity, cliVersion, cmd.Context())
 			if err != nil {
 				return fmt.Errorf("failed to create TUI: %w", err)
 			}

internal/tui/model.go

@@ -68,6 +68,7 @@ type Model struct {
 	session            *Session
 	ctx                context.Context
 	identity           string                   // "email · host" shown in header + status
+	version            string                   // build-time version shown in header
 	conversationMsgs   []components.ChatMessage // full history sent on each turn (multi-turn context)
 	chatID             *string                  // Glean chatId — server manages conversation context
 	startTime          time.Time                // session start, for stats on quit
@@ -101,7 +102,7 @@ type Model struct {
 }
 
 // New creates a fully-initialized TUI model.
-func New(cfg *config.Config, session *Session, identity string, ctx context.Context) (*Model, error) {
+func New(cfg *config.Config, session *Session, identity, version string, ctx context.Context) (*Model, error) {
 	ta := textarea.New()
 	ta.Placeholder = "Message Glean…"
 	ta.Focus()
@@ -137,6 +138,7 @@ func New(cfg *config.Config, session *Session, identity string, ctx context.Cont
 		cfg:        cfg,
 		session:    session,
 		identity:   identity,
+		version:    version,
 		ctx:        ctx,
 		startTime:  time.Now(),
 		historyIdx: -1,
@@ -448,11 +450,13 @@ func (m *Model) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 
 	m.textarea, taCmd = m.textarea.Update(msg)
 
-	// Grow the textarea vertically as content wraps, up to 6 lines.
-	// Shrink it back when the user deletes content.
+	// Grow the textarea vertically as content wraps, up to 6 visual rows.
+	// LineInfo().Height is the wrapped visual row count for the current line —
+	// correct even with InsertNewline disabled (unlike LineCount which counts
+	// logical lines and is always 1 when newlines are disabled).
 	if _, isKey := msg.(tea.KeyMsg); isKey {
 		const maxInputLines = 6
-		desired := m.textarea.LineCount()
+		desired := m.textarea.LineInfo().Height
 		if desired < 1 {
 			desired = 1
 		} else if desired > maxInputLines {

internal/tui/tui_test.go

@@ -19,7 +19,7 @@ import (
 func newTestModel(t *testing.T) *Model {
 	t.Helper()
 	cfg := &config.Config{GleanHost: "test-be.glean.com", GleanToken: "tok"}
-	m, err := New(cfg, &Session{}, "[email protected] · test", context.Background())
+	m, err := New(cfg, &Session{}, "[email protected] · test", "dev", context.Background())
 	require.NoError(t, err)
 	// Simulate a terminal size so layout calculations are predictable.
 	m.width = 120

internal/tui/view.go

@@ -87,7 +87,11 @@ func (m *Model) headerView() string {
 
 	var sb strings.Builder
 	sb.WriteString("\n")
-	sb.WriteString("  " + styleStatusAccent.Render("Glean CLI") + "\n")
+	title := "Glean CLI"
+	if m.version != "" && m.version != "dev" {
+		title += "  " + styleTagline.Render(m.version)
+	}
+	sb.WriteString("  " + styleStatusAccent.Render(title) + "\n")
 	if email != "" {
 		sb.WriteString("  " + styleTagline.Render("Logged in as "+email) + "\n")
 	}