feat: unified navigation

fix: install script copying build binary
chore: updated readme

internal/ui/waveform/waveform.go

@@ -13,7 +13,6 @@ import (
 type Model struct {
 	Width    int
 	Height   int
-	Focused  bool
 	Samples  []float64
 	Position float64 // 0.0 to 1.0
 	Duration time.Duration
@@ -49,11 +48,6 @@ func (m *Model) SetSize(width, height int) {
 	m.Height = height
 }
 
-// SetFocused sets the focus state
-func (m *Model) SetFocused(focused bool) {
-	m.Focused = focused
-}
-
 // View renders the waveform
 func (m Model) View() string {
 	contentWidth := m.Width - 4 // Account for border and padding
@@ -115,11 +109,8 @@ func (m Model) View() string {
 		timeLine,
 	)
 
-	// Apply border style based on focus
-	style := ui.WaveformStyle
-	if m.Focused {
-		style = ui.WaveformFocusedStyle
-	}
+	// Apply focused border style
+	style := ui.WaveformFocusedStyle
 
 	return style.Width(m.Width - 2).Render(content)
 }