Add text selection and copy capability to terminal UI

internal/tui/screens/detail.go

@@ -152,7 +152,9 @@ func (s *DetailScreen) renderContent() string {
 
 	statusText := s.status
 	if s.status == wireguard.StatusConnected {
-		statusText = theme.StyleSuccess.Bold(true).Render("● " + s.status)
+		duration := time.Since(s.lastHandshake)
+		quality := wireguard.CalculateQuality(duration)
+		statusText = theme.StyleSuccess.Bold(true).Render("● " + s.status + " (" + quality + ")")
 	} else {
 		statusText = theme.StyleError.Bold(true).Render("● " + s.status)
 	}

internal/tui/screens/help.go

@@ -41,7 +41,6 @@ func (s *HelpScreen) View() string {
 	// Breadcrumb: Help
 	breadcrumb := components.RenderBreadcrumb([]components.BreadcrumbItem{{Label: "Help", ID: "help"}})
 
-
 	// Styles
 	borderStyle := lipgloss.NewStyle().
 		BorderStyle(lipgloss.RoundedBorder()).
@@ -90,6 +89,11 @@ func (s *HelpScreen) View() string {
 		keyStyle.Render("/") + descStyle.Render("Search") + "\n" +
 		keyStyle.Render("q") + descStyle.Render("Quit")
 
+	copyGroup := categoryStyle.Render("Text Selection & Copy") + "\n" +
+		keyStyle.Render("SHIFT+drag") + descStyle.Render("Select text") + "\n" +
+		keyStyle.Render("Ctrl+Shift+C") + descStyle.Render("Copy (Linux)") + "\n" +
+		keyStyle.Render("Cmd+C") + descStyle.Render("Copy (macOS)")
+
 	// Two-column layout
 	leftColumn := lipgloss.JoinVertical(lipgloss.Left,
 		navigationGroup,
@@ -99,6 +103,8 @@ func (s *HelpScreen) View() string {
 
 	rightColumn := lipgloss.JoinVertical(lipgloss.Left,
 		otherGroup,
+		"",
+		copyGroup,
 	)
 
 	content := lipgloss.JoinHorizontal(lipgloss.Top, leftColumn, "  ", rightColumn)