Method renderCollapsedSidebar

pkg/tui/page/chat/chat.go:472–506

renderCollapsedSidebar renders the sidebar in collapsed mode (at top of screen).

(sl sidebarLayout)

// renderCollapsedSidebar renders the sidebar in collapsed mode (at top of screen).
func (p *chatPage) renderCollapsedSidebar(sl sidebarLayout) string {
	// Guard against unset/invalid layout (can happen before WindowSizeMsg is received).
	width := max(0, sl.innerWidth)
	height := max(0, sl.sidebarHeight)
	if width == 0 || height == 0 {
		return ""
	}

	sidebarView := p.sidebar.View()
	sidebarLines := strings.Split(sidebarView, "\n")

	// Place toggle glyph at the far right of the first line
	if sl.showToggle() && sl.mode != sidebarVertical && len(sidebarLines) > 0 {
		toggleGlyph := styles.MutedStyle.Render("«")
		glyphW := lipgloss.Width(toggleGlyph)
		padded := lipgloss.NewStyle().Width(width - glyphW).Render(sidebarLines[0])
		sidebarLines[0] = padded + toggleGlyph
	}

	// Replace the last line with a subtle divider
	divider := styles.FadingStyle.Render(strings.Repeat("─", width))
	if len(sidebarLines) >= height {
		sidebarLines[height-1] = divider
	} else {
		sidebarLines = append(sidebarLines, divider)
	}

	sidebarWithDivider := strings.Join(sidebarLines, "\n")

	return lipgloss.NewStyle().
		Width(width).
		Height(height).
		Align(lipgloss.Left, lipgloss.Top).
		Render(sidebarWithDivider)
}

// View renders the chat page (messages + sidebar only, no editor or resize handle)
func (p *chatPage) View() string {