MauiProgram.cs

using BabyBuddyHelper.Core.Interfaces.Baby;
using BabyBuddyHelper.Core.Interfaces.Cub;
using BabyBuddyHelper.Core.Interfaces.TaskList;
using BabyBuddyHelper.Core.Interfaces.Vaccine;
using BabyBuddyHelper.Core.Interfaces;
using BabyBuddyHelper.Core.Persistence;
using BabyBuddyHelper.Core.Services.Baby;
using BabyBuddyHelper.Core.Services.Cub;
using BabyBuddyHelper.Core.Services.TaskList;
using BabyBuddyHelper.Core.Services.Vaccine;
using BabyBuddyHelper.Core.Storage;
using BabyBuddyHelper.Remote;
using CommunityToolkit.Maui;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Logging;
using SkiaSharp.Views.Maui.Controls.Hosting;
using Syncfusion.Maui.Core.Hosting;
using System.Diagnostics;

namespace BabyBuddyHelper
{
    public static class MauiProgram
    {
        public static MauiApp CreateMauiApp()
        {
            var builder = MauiApp.CreateBuilder();

            RegisterSyncfusionLicense();

            builder
                .UseMauiApp<App>()
                .UseMauiCommunityToolkit()
                .UseSkiaSharp()
                .ConfigureFonts(fonts =>
                {
                    fonts.AddFont("OpenSans-Regular.ttf", "OpenSansRegular");
                    fonts.AddFont("OpenSans-Semibold.ttf", "OpenSansSemibold");
                })
                .ConfigureSyncfusionCore()
                .Services.AddSingleton<ITaskListService, TaskListService>()
                .AddSingleton<IBabyProfileService, BabyProfileService>()
                .AddSingleton<IBabyFilterService, BabyFilterService>()
                .AddSingleton<IVaccineCatalog, VaccineCatalog>()
                .AddSingleton<IVaccineService, VaccineService>()
                .AddSingleton<ITrackerDbService, EfTrackerDbService>()
                .AddSingleton<IApiKeyStore, SecureApiKeyStore>()
                .AddSingleton<ICubChatClient, ClaudeCubChatClient>() //The only place that references Remote/ (ADR-017)
                .AddSingleton<CubReplyService>()
                .AddSingleton<ICubPersonalityStore, PreferencesCubPersonalityStore>()
                .AddDbContextFactory<TrackerContext>(options =>
                    options.UseSqlite($"Data Source={Path.Combine(FileSystem.AppDataDirectory, "babybuddy.db3")}"));

#if WINDOWS
            WinUI.ShellTabBarFooter.Register();
#endif

#if DEBUG
            builder.Logging.AddDebug();
#endif

            return builder.Build();
        }

        //The license is compiled into BuildSecrets by the GenerateBuildSecrets target in the .csproj, so it travels
        //with the app on every platform. Nothing is read from disk at runtime, and the key is never logged.
        private static void RegisterSyncfusionLicense()
        {
            try //tryCatch prevents app from crashing if the license is missing or invalid
            {
                if (string.IsNullOrWhiteSpace(BuildSecrets.SyncfusionLicense))
                {
                    Debug.WriteLine("Syncfusion license missing at build time. Running unlicensed.");
                    return;
                }

                Syncfusion.Licensing.SyncfusionLicenseProvider
                .RegisterLicense(BuildSecrets.SyncfusionLicense);

                //RegisterLicense only stores the key; Syncfusion checks it when the first control loads.
                //Keys are valid for one major version, so a package upgrade can silently invalidate it (#118).
                bool isValid = Syncfusion.Licensing.SyncfusionLicenseProvider
                .ValidateLicense([Syncfusion.Licensing.Platform.MAUI], out string message);

                Debug.WriteLine(isValid
                    ? "Syncfusion license registered and valid."
                    : $"Syncfusion license rejected: {message}");
            }
            catch (Exception ex)
            {
                Debug.WriteLine($"Error registering Syncfusion license: {ex.Message}");
            }
        }
    }
}