From 2548e38af9b92c3f36aaeddd752a5bd04667d118 Mon Sep 17 00:00:00 2001
From: "Hermes (Server)" <hermes@baka-net.de>
Date: Wed, 19 Aug 2026 19:04:47 +0200
Subject: [PATCH] feat(settings): Cache-Status UI + Clear-Button (Phase 2)
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

- Neuer 'Cache-Speicher' ListTile in Musikserver-Sektion
- Zeigt Cache-Größe in MB/KB/B
- Clear-Button: Löscht alle gecachten Lieder
- _formatBytes() für Größen-Anzeige
- _clearCache() mit SnackBar-Feedback

Nutzer kann jetzt Cache-Status sehen + leeren!
Tests: 70/70 ✅
---
 lib/settings/settings_screen.dart | 37 +++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/lib/settings/settings_screen.dart b/lib/settings/settings_screen.dart
index f6cc465..362bcc6 100644
--- a/lib/settings/settings_screen.dart
+++ b/lib/settings/settings_screen.dart
@@ -3,6 +3,7 @@ import 'package:provider/provider.dart';
 
 import '../library/database.dart';
 import '../library/permissions.dart';
+import '../services/cache_manager.dart';
 import '../services/navidrome_service.dart';
 import '../services/offline_mode.dart';
 import 'library_stats.dart';
@@ -17,11 +18,19 @@ class SettingsScreen extends StatefulWidget {
 
 class _SettingsScreenState extends State<SettingsScreen> {
   late final NavidromeService _navidrome = NavidromeService();
+  late final CacheManager _cache = CacheManager();
+  int _cacheSize = 0;
 
   @override
   void initState() {
     super.initState();
     _navidrome.ladeGespeicherteZugangsdaten();
+    _cache.init().then((_) => _updateCacheSize());
+  }
+
+  Future<void> _updateCacheSize() async {
+    final size = await _cache.getCacheSize();
+    if (mounted) setState(() => _cacheSize = size);
   }
 
   @override
@@ -82,6 +91,18 @@ class _SettingsScreenState extends State<SettingsScreen> {
               },
             ),
           ),
+          ListTile(
+            leading: const Icon(Icons.storage),
+            title: const Text('🗄️ Cache-Speicher'),
+            subtitle: Text(_formatBytes(_cacheSize)),
+            trailing: _cacheSize > 0
+                ? IconButton(
+                    tooltip: 'Cache löschen',
+                    icon: const Icon(Icons.delete),
+                    onPressed: () => _clearCache(),
+                  )
+                : null,
+          ),
           const Divider(height: 1),
           const _SectionLabel('Berechtigungen'),
           ListTile(
@@ -210,6 +231,22 @@ class _SettingsScreenState extends State<SettingsScreen> {
     await _navidrome.loescheZugangsdaten();
     if (mounted) setState(() {});
   }
+
+  Future<void> _clearCache() async {
+    await _cache.clearCache();
+    if (mounted) {
+      setState(() => _cacheSize = 0);
+      ScaffoldMessenger.of(context).showSnackBar(
+        const SnackBar(content: Text('Cache gelöscht')),
+      );
+    }
+  }
+
+  String _formatBytes(int bytes) {
+    if (bytes < 1024) return '$bytes B';
+    if (bytes < 1024 * 1024) return '${(bytes / 1024).toStringAsFixed(1)} KB';
+    return '${(bytes / (1024 * 1024)).toStringAsFixed(1)} MB';
+  }
 }
 
 /// Kleine graue Überschrift über einer Einstellungs-Gruppe.