✨ Feature: Login-Verbesserungen für Dustin!

1. 🔗 AUTO-URL: Server-URL \"https://musik.baka-net.de\" vorausgefüllt (editierbar)
2. 👤 USER-BUTTONS: Baka/Tinker/Dustin als Button-Auswahl (statt Text-Input)
3. 🔐 PASSWORT-ONLY: Dialog zeigt nur Passwort-Feld + User-Auswahl (wie beim Register!)
4. 💡 GAST-MODUS: Info-Text erklärt lokale Nutzung ohne Server-Konto
   → App funktioniert auch komplett offline mit lokaler Musikbibliothek!

UX-Verbesserungen:
- Weniger zu tippen (URL + User vorgegeben)
- Schneller Login für Baka/Tinker/Dustin
- Klare Fallback-Option für lokale Nutzung

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

lib/settings/settings_screen.dart

@@ -79,6 +79,14 @@ class _SettingsScreenState extends State<SettingsScreen> {
                     onPressed: () => _zeigeNavidromeDialog(),
                   ),
           ),
+          if (!_navidrome.istVerbunden)
+            Padding(
+              padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 8),
+              child: Text(
+                '💡 Tipp: Oder nutze Melo lokal ohne Server-Konto (nur deine Musik auf dem Gerät)',
+                style: TextStyle(fontSize: 12, color: Colors.white54),
+              ),
+            ),
           ListTile(
             leading: const Icon(Icons.wifi_off),
             title: const Text('📴 Offline-Modus'),
@@ -147,9 +155,9 @@ class _SettingsScreenState extends State<SettingsScreen> {
   }
 
   void _zeigeNavidromeDialog() {
-    final urlCtrl = TextEditingController();
+    final urlCtrl = TextEditingController(text: 'https://musik.baka-net.de');
-    final userCtrl = TextEditingController();
     final passCtrl = TextEditingController();
+    String selectedUser = 'Dustin';
     bool verbindet = false;
     String? fehler;
 
@@ -158,59 +166,91 @@ class _SettingsScreenState extends State<SettingsScreen> {
       builder: (ctx) => StatefulBuilder(
         builder: (ctx, setDialogState) => AlertDialog(
           backgroundColor: Colors.grey.shade900,
-          title: const Text('🌐 Navidrome Verbinden',
+          title: const Text('🌐 Navidrome Login',
               style: TextStyle(color: Colors.white, fontSize: 16)),
-          content: Column(
+          content: SingleChildScrollView(
-            mainAxisSize: MainAxisSize.min,
+            child: Column(
-            children: [
+              mainAxisSize: MainAxisSize.min,
-              TextField(
+              children: [
-                controller: urlCtrl,
+                TextField(
-                style: const TextStyle(color: Colors.white),
+                  controller: urlCtrl,
-                decoration: const InputDecoration(
+                  style: const TextStyle(color: Colors.white),
-                  labelText: 'Server-URL',
+                  decoration: const InputDecoration(
-                  hintText: 'https://musik.example.com',
+                    labelText: 'Server-URL',
-                  labelStyle: TextStyle(color: Colors.grey),
+                    labelStyle: TextStyle(color: Colors.grey),
-                  hintStyle: TextStyle(color: Colors.grey),
+                    border: OutlineInputBorder(),
-                  border: OutlineInputBorder(),
-                ),
-              ),
-              const SizedBox(height: 8),
-              TextField(
-                controller: userCtrl,
-                style: const TextStyle(color: Colors.white),
-                decoration: const InputDecoration(
-                  labelText: 'Benutzer',
-                  labelStyle: TextStyle(color: Colors.grey),
-                  border: OutlineInputBorder(),
-                ),
-              ),
-              const SizedBox(height: 8),
-              TextField(
-                controller: passCtrl,
-                style: const TextStyle(color: Colors.white),
-                obscureText: true,
-                decoration: const InputDecoration(
-                  labelText: 'Passwort',
-                  labelStyle: TextStyle(color: Colors.grey),
-                  border: OutlineInputBorder(),
-                ),
-              ),
-              if (fehler != null) ...[
-                const SizedBox(height: 8),
-                Text(fehler!,
-                    style: const TextStyle(color: Colors.red, fontSize: 12)),
-              ],
-              if (verbindet)
-                const Padding(
-                  padding: EdgeInsets.only(top: 12),
-                  child: SizedBox(
-                    width: 20,
-                    height: 20,
-                    child: CircularProgressIndicator(
-                        strokeWidth: 2, color: Colors.redAccent),
                   ),
                 ),
-            ],
+                const SizedBox(height: 12),
+                const Text('Benutzer:', style: TextStyle(fontSize: 12, color: Colors.white70)),
+                const SizedBox(height: 8),
+                Row(
+                  children: [
+                    Expanded(
+                      child: FilledButton(
+                        onPressed: () => setDialogState(() => selectedUser = 'Baka'),
+                        style: FilledButton.styleFrom(
+                          backgroundColor: selectedUser == 'Baka'
+                              ? Colors.redAccent
+                              : Colors.grey.shade700,
+                        ),
+                        child: const Text('Baka'),
+                      ),
+                    ),
+                    const SizedBox(width: 8),
+                    Expanded(
+                      child: FilledButton(
+                        onPressed: () => setDialogState(() => selectedUser = 'Tinker'),
+                        style: FilledButton.styleFrom(
+                          backgroundColor: selectedUser == 'Tinker'
+                              ? Colors.redAccent
+                              : Colors.grey.shade700,
+                        ),
+                        child: const Text('Tinker'),
+                      ),
+                    ),
+                    const SizedBox(width: 8),
+                    Expanded(
+                      child: FilledButton(
+                        onPressed: () => setDialogState(() => selectedUser = 'Dustin'),
+                        style: FilledButton.styleFrom(
+                          backgroundColor: selectedUser == 'Dustin'
+                              ? Colors.redAccent
+                              : Colors.grey.shade700,
+                        ),
+                        child: const Text('Dustin'),
+                      ),
+                    ),
+                  ],
+                ),
+                const SizedBox(height: 12),
+                TextField(
+                  controller: passCtrl,
+                  style: const TextStyle(color: Colors.white),
+                  obscureText: true,
+                  decoration: const InputDecoration(
+                    labelText: 'Passwort',
+                    labelStyle: TextStyle(color: Colors.grey),
+                    border: OutlineInputBorder(),
+                  ),
+                ),
+                if (fehler != null) ...[
+                  const SizedBox(height: 8),
+                  Text(fehler!,
+                      style: const TextStyle(color: Colors.red, fontSize: 12)),
+                ],
+                if (verbindet)
+                  const Padding(
+                    padding: EdgeInsets.only(top: 12),
+                    child: SizedBox(
+                      width: 20,
+                      height: 20,
+                      child: CircularProgressIndicator(
+                          strokeWidth: 2, color: Colors.redAccent),
+                    ),
+                  ),
+              ],
+            ),
           ),
           actions: [
             TextButton(
@@ -222,20 +262,20 @@ class _SettingsScreenState extends State<SettingsScreen> {
                   : () async {
                       setDialogState(() => verbindet = true);
                       _navidrome.setCredentials(
-                          urlCtrl.text, userCtrl.text, passCtrl.text);
+                          urlCtrl.text, selectedUser, passCtrl.text);
                       final ok = await _navidrome.ping();
                       setDialogState(() => verbindet = false);
                       if (ok && ctx.mounted) {
                         await _navidrome.speichereZugangsdaten(
-                            urlCtrl.text, userCtrl.text, passCtrl.text);
+                            urlCtrl.text, selectedUser, passCtrl.text);
                         if (ctx.mounted) Navigator.pop(ctx);
                         if (mounted) setState(() {});
                       } else if (ctx.mounted) {
                         setDialogState(() =>
-                            fehler = '❌ Verbindung fehlgeschlagen\nPrüfe URL + Zugangsdaten');
+                            fehler = '❌ Login fehlgeschlagen');
                       }
                     },
-              child: const Text('Verbinden',
+              child: const Text('Login',
                   style: TextStyle(color: Colors.redAccent)),
             ),
           ],
@@ -243,7 +283,6 @@ class _SettingsScreenState extends State<SettingsScreen> {
       ),
     ).then((_) {
       urlCtrl.dispose();
-      userCtrl.dispose();
       passCtrl.dispose();
     });
   }