first commit

Services/NtfyNotificationService.cs

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+using HanaToolbox.Config;
+using HanaToolbox.Logging;
+using HanaToolbox.Services.Interfaces;
+
+namespace HanaToolbox.Services;
+
+/// <summary>
+/// Sends notifications to a ntfy server.
+/// URL and token are read from <see cref="NtfyConfig"/> (set during onboarding).
+/// Failures are silently swallowed — notifications must never crash the main flow.
+/// </summary>
+public sealed class NtfyNotificationService(NtfyConfig config, AppLogger logger)
+    : INotificationService
+{
+    private static readonly HttpClient Http = new();
+
+    public async Task SendAsync(string title, string message, CancellationToken ct = default)
+    {
+        if (string.IsNullOrWhiteSpace(config.Url) || string.IsNullOrWhiteSpace(config.Token))
+        {
+            logger.Info("Ntfy not configured — skipping notification.");
+            return;
+        }
+
+        try
+        {
+            using var request = new HttpRequestMessage(HttpMethod.Post, config.Url);
+            request.Headers.Add("Authorization", $"Bearer {config.Token}");
+            request.Headers.Add("Title", title);
+            request.Content = new StringContent(message);
+            await Http.SendAsync(request, ct);
+            logger.Info($"Notification sent: [{title}] {message}");
+        }
+        catch (Exception ex)
+        {
+            logger.Warning($"Failed to send ntfy notification: {ex.Message}");
+        }
+    }
+}