📊 Feature: Auto-Bugreport System (Logger Service)

Flutter-App Seite:
- LoggerService: Centralized Logging (DEBUG/INFO/WARNING/ERROR)
- Automatic Upload zu logs.baka-net.de/api/logs
  - Fehler sofort senden
  - Andere Logs collected (batch von 20)
- Device-Info: Model + OS-Version tracken
- Integration in NavidromeService: Login-Fehler loggen + URL + Status
- Global logger Instance für überall nutzbar

Auto-Features:
✅ Timestamp + Device-Info + Error Stack-Traces
✅ Auto-Upload nach 20 Logs oder sofort bei Fehler
✅ JSON-Format für Server-Verarbeitung

Nächste Schritte:
- Log-Server deployen (FastAPI, SQLite, HTML-Viewer)
- Caddy-Route für logs.baka-net.de
- Basic Auth für Log-Seite

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01XJzQjUtnvYUtHdnTs3iCru

lib/services/navidrome_service.dart

@@ -6,6 +6,7 @@ import 'package:http/http.dart' as http;
 import 'package:shared_preferences/shared_preferences.dart';
 import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import 'cache_manager.dart';
+import 'logger_service.dart';
 
 class SubsonicSong {
   final String id;
@@ -139,8 +140,15 @@ class NavidromeService {
   Future<bool> ping() async {
     try {
       final r = await http.get(_uri('ping.view')).timeout(const Duration(seconds: 10));
-      return r.statusCode == 200;
+      if (r.statusCode == 200) {
+        logger.info('✅ Navidrome Verbindung erfolgreich: $_serverUrl');
+        return true;
+      } else {
+        logger.warning('Navidrome Ping fehlgeschlagen (HTTP ${r.statusCode}): $_serverUrl');
+        return false;
+      }
     } catch (e) {
+      logger.error('Navidrome Ping Fehler', e, StackTrace.current);
       debugPrint('Navidrome Ping Fehler: $e');
       return false;
     }