Add "power" page

Signed-off-by: Hadi <[email protected]>

internal/ui/power/tabbar.go

@@ -0,0 +1,29 @@
+package power
+
+import (
+	"strings"
+
+	"charm.land/lipgloss/v2"
+	ilovetui "github.com/anotherhadi/ilovetui"
+	"github.com/anotherhadi/settuings/internal/icons"
+)
+
+// renderTabBar draws a header matching the bluetooth page's tab bar: a
+// single always-active label, since this page has no tabs of its own.
+func renderTabBar(width int) string {
+	style := lipgloss.NewStyle().Bold(true).Foreground(ilovetui.S.Primary).Padding(0, 2).
+		Border(lipgloss.NormalBorder(), false, false, true, false).
+		BorderForeground(ilovetui.S.Primary)
+
+	label := style.Render(icons.I.Power + "Power")
+
+	filler := width - lipgloss.Width(label)
+	if filler > 0 {
+		label = lipgloss.JoinHorizontal(lipgloss.Bottom, label,
+			lipgloss.NewStyle().
+				Border(lipgloss.NormalBorder(), false, false, true, false).
+				BorderForeground(ilovetui.S.Primary).
+				Render(strings.Repeat(" ", filler)))
+	}
+	return label
+}