LPLocalhostMES/LocalhostMES/Core/ThemeManager.cs

using System.Windows;
using System.Windows.Media;

namespace LocalhostMES.Core
{
    public enum ThemeMode
    {
        Light,
        Dark
    }

    public static class ThemeManager
    {
        public static ThemeMode CurrentTheme { get; private set; } = ThemeMode.Light;

        public static void ApplyTheme(ThemeMode mode)
        {
            var app = Application.Current;
            if (app == null)
            {
                return;
            }

            CurrentTheme = mode;
            if (mode == ThemeMode.Dark)
            {
                SetBrush(app, "Win11WindowBrush", "#0F1115");
                SetBrush(app, "Win11CardBrush", "#1A1D24");
                SetBrush(app, "Win11BorderBrush", "#2C3340");
                SetBrush(app, "Win11PrimaryBrush", "#3B82F6");
                SetBrush(app, "Win11PrimaryHoverBrush", "#2563EB");
                SetBrush(app, "Win11TextBrush", "#E5E7EB");
                SetBrush(app, "Win11SubTextBrush", "#9CA3AF");
                SetBrush(app, "Win11DangerBrush", "#EF4444");
                SetBrush(app, "Win11SuccessBrush", "#22C55E");
            }
            else
            {
                SetBrush(app, "Win11WindowBrush", "#F5F6F8");
                SetBrush(app, "Win11CardBrush", "#FFFFFF");
                SetBrush(app, "Win11BorderBrush", "#DEE2E8");
                SetBrush(app, "Win11PrimaryBrush", "#2563EB");
                SetBrush(app, "Win11PrimaryHoverBrush", "#1D4ED8");
                SetBrush(app, "Win11TextBrush", "#111827");
                SetBrush(app, "Win11SubTextBrush", "#6B7280");
                SetBrush(app, "Win11DangerBrush", "#DC2626");
                SetBrush(app, "Win11SuccessBrush", "#16A34A");
            }
        }

        private static void SetBrush(Application app, string key, string colorHex)
        {
            app.Resources[key] = new SolidColorBrush((Color)ColorConverter.ConvertFromString(colorHex));
        }
    }
}