fix: restore dynamic //// fill in Help section headers

buildLines() now takes width and computes the slash fill correctly.
Width=0 used at construction time (line counting only, fill irrelevant).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: gitcoder89431

internal/screens/help.go

@@ -18,7 +18,7 @@ type Help struct {
 
 func NewHelp(bindings [][]key.Binding, t theme.Theme) Help {
 	h := Help{bindings: bindings, theme: t}
-	h.totalLines = len(h.buildLines())
+	h.totalLines = len(h.buildLines(0)) // width=0 for counting only
 	return h
 }
 
@@ -42,7 +42,7 @@ func (h Help) Update(msg tea.Msg) (Screen, tea.Cmd) {
 }
 
 func (h Help) View(width, height int) string {
-	lines := h.buildLines()
+	lines := h.buildLines(width)
 	total := len(lines)
 
 	if total <= height {
@@ -68,9 +68,12 @@ func (h Help) View(width, height int) string {
 }
 
 // buildLines returns the full list of rendered lines for the Help screen.
-func (h Help) buildLines() []string {
+// Pass the actual width for rendering; pass 0 when only counting lines.
+func (h Help) buildLines(width int) []string {
 	rule := func(label string) string {
-		return h.theme.Title.Render(label) + h.theme.PaletteAccent.Render(" ////")
+		labelW := lipgloss.Width(label)
+		fill := strings.Repeat("/", max(0, width-labelW-1))
+		return h.theme.Title.Render(label) + h.theme.PaletteAccent.Render(" "+fill)
 	}
 	bind := func(k, desc string) string {
 		return "  " + h.theme.Accent.Render(k) + "  " + h.theme.Muted.Render(desc)