v2.51.3 — Cloud-Dashboard UI (Statistik-Karten, Speicher, Sync-Historie) + Lint-Fixes

## Cloud-Dashboard (cloud_screen.dart)
- Statistik-Karten 2x2: Songs, Playlisten, Favoriten, Letzter Sync (Daten aus statusDaten/syncStatus)
- Speicheranzeige mit Balken — Platzhalter „–" wenn der Server keine Storage-Daten liefert (storage_used/storage_total o.ä.)
- Sync-Historie-Zeile: „Heute: X Dateien, Y Favoriten, Z Playlisten" aus _syncHistorie (heute gefiltert)
- Konflikt-Dialog NUR bei abweichendem Titel (lokal ≠ Server), sonst kein Dialog
- Lint-Fixes: curly_braces (if ohne Block) + unused _syncHistorieHeuteText (jetzt in der Historie-Zeile verdrahtet)
- Sync-Animation während des Syncs: rotierendes ☁️-Icon + Fortschrittsring (CloudStatus/AnimationController)

Keine neuen Packages, flutter analyze 0 Issues, Tests 98/98 grün

lib/screens/cloud_screen.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:convert';
 import 'dart:io';
 import 'package:flutter/material.dart';
 import 'package:path_provider/path_provider.dart';
@@ -9,6 +10,7 @@ import '../utils/sanitize.dart';
 import '../services/cloud_service.dart';
 import '../database/db_helper.dart';
 import '../services/melo_logger.dart';
+import '../models/song.dart';
 import '../main.dart'; // notificationsPlugin
 
 /// Melo Cloud Sync Screen v3 — vollständiges Sync-System
@@ -22,16 +24,21 @@ class CloudScreen extends StatefulWidget {
   State<CloudScreen> createState() => _CloudScreenState();
 }
 
-class _CloudScreenState extends State<CloudScreen> {
+class _CloudScreenState extends State<CloudScreen>
+    with SingleTickerProviderStateMixin {
   // ─── Status ───
   int _serverCount = 0;
   int _favServerCount = 0;
   int _playlistServerCount = 0;
+  Map? _serverStatusDaten;
   bool _ladt = false;
   String? _status;
   bool _statusOk = false;
   bool _serverDatenGeladen = false;
 
+  // ─── Sync-Animation ───
+  late final AnimationController _syncAnimController;
+
   // ─── Sync-Einstellungen ───
   bool _autoSync = true;
   int _syncIntervall = 6;
@@ -45,6 +52,9 @@ class _CloudScreenState extends State<CloudScreen> {
   bool _syncLaeuft = false;
   int _syncedItems = 0;
 
+  // ─── Sync-Historie (heute) ───
+  List<Map<String, dynamic>> _syncHistorie = [];
+
   // ─── Korrupt ───
   List<Map> _korrupteSongs = [];
   bool _ladtKorrupt = false;
@@ -65,9 +75,14 @@ class _CloudScreenState extends State<CloudScreen> {
   @override
   void initState() {
     super.initState();
+    _syncAnimController = AnimationController(
+      vsync: this,
+      duration: const Duration(milliseconds: 1400),
+    );
     // Verbindung stellt der CloudService beim App-Start her (MeloHome.initState).
     // Hier nur Settings laden + Serverdaten, sobald der Service verbunden ist.
     _ladeSettings();
+    _ladeSyncHistorie();
     if (widget.cloud.istVerbunden) {
       _serverDatenGeladen = true;
       _ladeServerDaten();
@@ -84,6 +99,7 @@ class _CloudScreenState extends State<CloudScreen> {
   void dispose() {
     widget.cloud.removeListener(_onCloudStatus);
     _syncTimer?.cancel();
+    _syncAnimController.dispose();
     _renameTitleCtrl.dispose();
     _renameArtistCtrl.dispose();
     super.dispose();
@@ -188,6 +204,7 @@ class _CloudScreenState extends State<CloudScreen> {
       _syncFortschritt = 0;
       _syncedItems = 0;
     });
+    _syncAnimController.repeat();
 
     try {
       // Phase 1: Songs synchronisieren
@@ -209,7 +226,7 @@ class _CloudScreenState extends State<CloudScreen> {
         if (existing == null) totalNew++;
       }
 
-      // Downloade neue Songs
+      // Downloade neue Songs + löse Konflikte (Titel lokal ≠ Server)
       int processed = 0;
       for (final song in serverSongs) {
         final sid = song['id']?.toString() ?? '';
@@ -217,6 +234,41 @@ class _CloudScreenState extends State<CloudScreen> {
         final title = (song['title'] ?? 'unknown').toString();
         final existing = await db.songNachCloudId(sid);
         if (existing != null) {
+          // Konfliktprüfung: Server-Titel weicht vom lokalen ab
+          final serverTitel = title.trim();
+          final lokalerTitel = existing.titel.trim();
+          if (serverTitel.isNotEmpty &&
+              lokalerTitel.toLowerCase() != serverTitel.toLowerCase()) {
+            final wahl = await _konfliktDialog(existing, song);
+            if (wahl == 'server') {
+              await db.cloudMetadatenAktualisieren(
+                existing.id!,
+                title: serverTitel,
+                artist: (song['artist']?.toString() ?? '').trim(),
+              );
+              _syncedItems++;
+            } else if (wahl == 'beide') {
+              // Server-Kopie als eigenen lokalen Song ohne cloud_id anlegen
+              final safeTitle = sanitizeDateiname(serverTitel);
+              var dest = '${dir.path}/$safeTitle';
+              if (await File(dest).exists()) {
+                dest = '${dir.path}/$safeTitle (Server)';
+              }
+              if (await widget.cloud.download(sid, dest)) {
+                await db.songEinfuegen(Song(
+                  titel: serverTitel,
+                  kuenstler: (song['artist']?.toString() ?? '').trim(),
+                  dauerSekunden: 0,
+                  dateiPfad: dest,
+                  downloadQuelle: 'cloud',
+                  istHeruntergeladen: true,
+                ));
+                downloaded++;
+                _syncedItems = downloaded;
+              }
+            }
+            // 'lokal' → nichts tun (lokale Version behalten)
+          }
           processed++;
           continue;
         }
@@ -266,6 +318,12 @@ class _CloudScreenState extends State<CloudScreen> {
         _setzeStatus(
             '$downloaded Songs + ${favIds.length} Favoriten synchronisiert',
             ok: true);
+        // Sync-Historie fürs Dashboard festhalten
+        await _syncHistorieEintragen(
+          dateien: downloaded,
+          favoriten: favIds.length,
+          playlists: _serverPlaylists.length,
+        );
         await _ladeStatus();
       }
       MeloLogger().aktion('cloud_sync_all', {
@@ -277,6 +335,8 @@ class _CloudScreenState extends State<CloudScreen> {
       MeloLogger().fehler('cloud_sync_all', e);
       _setzeStatus('Sync-Fehler: $e', ok: false);
     } finally {
+      _syncAnimController.stop();
+      _syncAnimController.value = 0;
       if (mounted) {
         setState(() {
           _syncLaeuft = false;
@@ -286,6 +346,166 @@ class _CloudScreenState extends State<CloudScreen> {
     }
   }
 
+  // ─── 📜 Sync-Historie (fürs Dashboard) ───
+
+  static const _historieKey = 'cloud_sync_history';
+  static const _historieCap = 30;
+
+  Future<void> _ladeSyncHistorie() async {
+    final p = await SharedPreferences.getInstance();
+    final roh = p.getStringList(_historieKey) ?? [];
+    final eintraege = <Map<String, dynamic>>[];
+    for (final s in roh) {
+      try {
+        final m = jsonDecode(s) as Map<String, dynamic>;
+        eintraege.add(m);
+      } catch (_) {
+        // kaputte Einträge ignorieren
+      }
+    }
+    if (mounted) setState(() => _syncHistorie = eintraege);
+  }
+
+  Future<void> _syncHistorieEintragen({
+    required int dateien,
+    required int favoriten,
+    required int playlists,
+  }) async {
+    final eintrag = <String, dynamic>{
+      'ts': DateTime.now().toIso8601String(),
+      'dateien': dateien,
+      'favoriten': favoriten,
+      'playlists': playlists,
+    };
+    final p = await SharedPreferences.getInstance();
+    final liste = p.getStringList(_historieKey) ?? [];
+    liste.add(jsonEncode(eintrag));
+    while (liste.length > _historieCap) {
+      liste.removeAt(0);
+    }
+    await p.setStringList(_historieKey, liste);
+    if (mounted) {
+      setState(() => _syncHistorie = [
+            ..._syncHistorie,
+            eintrag,
+          ]);
+    }
+  }
+
+  /// Einträge von heute zusammenfassen: „heute 14 Dateien, 2 Favoriten, 1 Playlist“
+  String get _syncHistorieHeuteText {
+    final heute = DateTime.now();
+    int dateien = 0;
+    int favoriten = 0;
+    int playlists = 0;
+    for (final e in _syncHistorie) {
+      final ts = DateTime.tryParse(e['ts']?.toString() ?? '');
+      if (ts == null) continue;
+      if (ts.year == heute.year &&
+          ts.month == heute.month &&
+          ts.day == heute.day) {
+        dateien += (e['dateien'] as num?)?.toInt() ?? 0;
+        favoriten += (e['favoriten'] as num?)?.toInt() ?? 0;
+        playlists += (e['playlists'] as num?)?.toInt() ?? 0;
+      }
+    }
+    if (dateien == 0 && favoriten == 0 && playlists == 0) {
+      return 'Noch keine Syncs heute';
+    }
+    final teile = <String>[
+      if (dateien > 0) '$dateien Dateien',
+      if (favoriten > 0) '$favoriten Favoriten',
+      if (playlists > 0) '$playlists Playlist${playlists != 1 ? 'en' : ''}',
+    ];
+    return 'Heute: ${teile.join(', ')}';
+  }
+
+  /// Konflikt-Dialog: Titel lokal ≠ Server. NUR wenn ein Konflikt existiert.
+  /// Rückgabe: 'lokal' | 'server' | 'beide' | null (abgebrochen)
+  Future<String?> _konfliktDialog(Song lokal, Map serverSong) async {
+    final serverTitel = (serverSong['title'] ?? '?').toString();
+    final serverKuenstler = (serverSong['artist'] ?? '?').toString();
+    if (!mounted) return null;
+    return showDialog<String>(
+      context: context,
+      barrierDismissible: false,
+      builder: (ctx) => AlertDialog(
+        backgroundColor: MeloTheme.dunkel1,
+        title: const Text('⚠️ Konflikt',
+            style: TextStyle(color: Colors.white, fontSize: 17)),
+        content: Column(
+          mainAxisSize: MainAxisSize.min,
+          crossAxisAlignment: CrossAxisAlignment.start,
+          children: [
+            const Text(
+              'Titel weichen voneinander ab:',
+              style: TextStyle(color: MeloTheme.textSekundaer, fontSize: 12),
+            ),
+            const SizedBox(height: 10),
+            Container(
+              width: double.infinity,
+              padding: const EdgeInsets.all(10),
+              decoration: BoxDecoration(
+                color: MeloTheme.dunkel2,
+                borderRadius: BorderRadius.circular(10),
+              ),
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  const Text('📱 Lokal',
+                      style: TextStyle(color: MeloTheme.textSekundaer, fontSize: 11)),
+                  const SizedBox(height: 2),
+                  Text(lokal.titel,
+                      style: const TextStyle(color: Colors.white, fontSize: 13)),
+                  Text(lokal.kuenstler,
+                      style: const TextStyle(color: MeloTheme.textSekundaer, fontSize: 11)),
+                ],
+              ),
+            ),
+            const SizedBox(height: 8),
+            Container(
+              width: double.infinity,
+              padding: const EdgeInsets.all(10),
+              decoration: BoxDecoration(
+                color: MeloTheme.dunkel2,
+                borderRadius: BorderRadius.circular(10),
+              ),
+              child: Column(
+                crossAxisAlignment: CrossAxisAlignment.start,
+                children: [
+                  const Text('☁️ Server',
+                      style: TextStyle(color: MeloTheme.textSekundaer, fontSize: 11)),
+                  const SizedBox(height: 2),
+                  Text(serverTitel,
+                      style: const TextStyle(color: Colors.white, fontSize: 13)),
+                  Text(serverKuenstler,
+                      style: const TextStyle(color: MeloTheme.textSekundaer, fontSize: 11)),
+                ],
+              ),
+            ),
+          ],
+        ),
+        actions: [
+          TextButton(
+            onPressed: () => Navigator.pop(ctx, 'lokal'),
+            child: const Text('Lokale behalten',
+                style: TextStyle(color: MeloTheme.textSekundaer)),
+          ),
+          TextButton(
+            onPressed: () => Navigator.pop(ctx, 'beide'),
+            child: const Text('Beide behalten',
+                style: TextStyle(color: MeloTheme.textSekundaer)),
+          ),
+          TextButton(
+            onPressed: () => Navigator.pop(ctx, 'server'),
+            child: const Text('Server übernehmen',
+                style: TextStyle(color: MeloTheme.rot)),
+          ),
+        ],
+      ),
+    );
+  }
+
   void _updateSync(String phase, double progress) {
     if (mounted) {
       setState(() {
@@ -521,6 +741,7 @@ class _CloudScreenState extends State<CloudScreen> {
     final syncSt = await widget.cloud.syncStatus();
     if (!mounted) return;
     setState(() {
+      _serverStatusDaten = st;
       _serverCount = st?['total'] ?? 0;
 
       if (syncSt != null) {
@@ -698,12 +919,34 @@ class _CloudScreenState extends State<CloudScreen> {
         mainAxisSize: MainAxisSize.min,
         children: [
           SizedBox(
-            width: 80,
-            height: 80,
-            child: CircularProgressIndicator(
-              value: _syncFortschritt > 0 ? _syncFortschritt : null,
-              color: MeloTheme.rot,
-              strokeWidth: 4,
+            width: 90,
+            height: 90,
+            child: Stack(
+              alignment: Alignment.center,
+              children: [
+                SizedBox(
+                  width: 90,
+                  height: 90,
+                  child: CircularProgressIndicator(
+                    value: _syncFortschritt > 0 ? _syncFortschritt : null,
+                    color: MeloTheme.rot,
+                    strokeWidth: 4,
+                  ),
+                ),
+                // Rotierende ☁️-Animation während des Syncs
+                RotationTransition(
+                  turns: _syncAnimController,
+                  child: Container(
+                    width: 44,
+                    height: 44,
+                    decoration: BoxDecoration(
+                      color: MeloTheme.dunkel1,
+                      shape: BoxShape.circle,
+                    ),
+                    child: const Icon(Icons.cloud_sync, color: MeloTheme.rot, size: 26),
+                  ),
+                ),
+              ],
             ),
           ),
           const SizedBox(height: 20),
@@ -1135,35 +1378,179 @@ class _CloudScreenState extends State<CloudScreen> {
         border: Border.all(color: MeloTheme.dunkel2),
       ),
       child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
         children: [
-          _syncInfoZeile('Songs auf Server', '$_serverCount'),
-          _syncInfoZeile('Server-Favoriten', '$_favServerCount'),
-          _syncInfoZeile('Server-Playlisten', '$_playlistServerCount'),
-          _syncInfoZeile('Sync-Modus', _autoSync ? 'Automatisch (${_syncIntervall}h)' : 'Manuell'),
+          // ── Statistik-Karten 2×2: Songs · Playlisten · Favoriten · Letzter Sync ──
+          Row(
+            children: [
+              Expanded(
+                child: _statistikKarte(
+                  icon: Icons.library_music,
+                  label: 'Songs',
+                  wert: '$_serverCount',
+                ),
+              ),
+              const SizedBox(width: 10),
+              Expanded(
+                child: _statistikKarte(
+                  icon: Icons.playlist_play,
+                  label: 'Playlisten',
+                  wert: '$_playlistServerCount',
+                ),
+              ),
+            ],
+          ),
+          const SizedBox(height: 10),
+          Row(
+            children: [
+              Expanded(
+                child: _statistikKarte(
+                  icon: Icons.favorite,
+                  label: 'Favoriten',
+                  wert: '$_favServerCount',
+                ),
+              ),
+              const SizedBox(width: 10),
+              Expanded(
+                child: _statistikKarte(
+                  icon: Icons.history,
+                  label: 'Letzter Sync',
+                  wert: _letzterSync,
+                ),
+              ),
+            ],
+          ),
+          const SizedBox(height: 14),
+          const Divider(color: MeloTheme.dunkel2, height: 1),
+          const SizedBox(height: 12),
+          // ── Speicheranzeige (Balken, falls Server Daten liefert) ──
+          _speicherZeile(),
+          const SizedBox(height: 12),
+          // ── Sync-Historie (heute) ──
+          _syncHistorieZeile(),
         ],
       ),
     );
   }
 
-  Widget _syncInfoZeile(String label, String value) {
-    return Padding(
-      padding: const EdgeInsets.symmetric(vertical: 5),
-      child: Row(
-        mainAxisAlignment: MainAxisAlignment.spaceBetween,
+  Widget _statistikKarte({
+    required IconData icon,
+    required String label,
+    required String wert,
+  }) {
+    return Container(
+      padding: const EdgeInsets.symmetric(vertical: 14, horizontal: 12),
+      decoration: BoxDecoration(
+        color: MeloTheme.dunkel2,
+        borderRadius: BorderRadius.circular(12),
+      ),
+      child: Column(
+        crossAxisAlignment: CrossAxisAlignment.start,
         children: [
-          Text(label,
-              style: const TextStyle(
-                  color: MeloTheme.textSekundaer, fontSize: 13)),
-          Text(value,
-              style: const TextStyle(
-                  color: Colors.white,
-                  fontSize: 13,
-                  fontWeight: FontWeight.w500)),
+          Icon(icon, color: MeloTheme.rot, size: 16),
+          const SizedBox(height: 8),
+          Text(
+            wert,
+            maxLines: 1,
+            overflow: TextOverflow.ellipsis,
+            style: const TextStyle(
+              color: Colors.white,
+              fontSize: 18,
+              fontWeight: FontWeight.w700,
+            ),
+          ),
+          const SizedBox(height: 2),
+          Text(
+            label,
+            style: const TextStyle(
+                color: MeloTheme.textSekundaer, fontSize: 11),
+          ),
         ],
       ),
     );
   }
 
+  /// Speicheranzeige mit Balken. Liefert der Server keine Storage-Daten
+  /// (Felder `storage_used`/`storage_total` o.ä.), erscheint Platzhalter „–".
+  Widget _speicherZeile() {
+    final st = _serverStatusDaten;
+    num? used;
+    num? total;
+    if (st != null) {
+      used = (st['storage_used'] ?? st['bytes_used'] ?? st['used_bytes']) as num?;
+      total = (st['storage_total'] ?? st['bytes_total'] ?? st['total_bytes'])
+          as num?;
+    }
+    final hatDaten = used != null && total != null && total > 0;
+    final anteil = hatDaten ? (used / total).clamp(0.0, 1.0) : 0.0;
+    return Column(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        Row(
+          children: [
+            const Icon(Icons.storage,
+                color: MeloTheme.textSekundaer, size: 16),
+            const SizedBox(width: 8),
+            const Text('Speicher',
+                style: TextStyle(
+                    color: MeloTheme.textSekundaer, fontSize: 13)),
+            const Spacer(),
+            Text(
+              hatDaten
+                  ? '${_formatBytes(used)} / ${_formatBytes(total)}'
+                  : '–',
+              style: const TextStyle(
+                color: Colors.white,
+                fontSize: 13,
+                fontWeight: FontWeight.w500,
+              ),
+            ),
+          ],
+        ),
+        const SizedBox(height: 8),
+        ClipRRect(
+          borderRadius: BorderRadius.circular(4),
+          child: LinearProgressIndicator(
+            value: hatDaten ? anteil.toDouble() : 0,
+            minHeight: 6,
+            backgroundColor: MeloTheme.dunkel2,
+            valueColor: const AlwaysStoppedAnimation<Color>(MeloTheme.rot),
+          ),
+        ),
+      ],
+    );
+  }
+
+  String _formatBytes(num bytes) {
+    if (bytes <= 0) return '0 B';
+    const einheiten = ['B', 'KB', 'MB', 'GB', 'TB'];
+    var wert = bytes.toDouble();
+    var i = 0;
+    while (wert >= 1024 && i < einheiten.length - 1) {
+      wert /= 1024;
+      i++;
+    }
+    return '${wert.toStringAsFixed(wert >= 100 ? 0 : 1)} ${einheiten[i]}';
+  }
+
+  /// Sync-Historie-Zeile: „Heute: 14 Dateien, 2 Favoriten, 1 Playlist“
+  Widget _syncHistorieZeile() {
+    return Row(
+      crossAxisAlignment: CrossAxisAlignment.start,
+      children: [
+        const Icon(Icons.event_note,
+            color: MeloTheme.textSekundaer, size: 16),
+        const SizedBox(width: 8),
+        Expanded(
+          child: Text(
+            _syncHistorieHeuteText,
+            style: const TextStyle(color: Colors.white70, fontSize: 12),
+          ),
+        ),
+      ],
+    );
+  }
+
   Widget _playlistSektion() {
     return Container(
       width: double.infinity,