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  "prompt": "Fix the following code in 'flutter/kart_okuyucu/lib/main.dart' (see below for file content)\n```\nimport 'dart:async';\nimport 'package:flutter/material.dart';\nimport 'models/personel.dart';\nimport 'serial_service.dart';\n```\n\nProblems:\n\n\n<file_content path=\"flutter/kart_okuyucu/lib/main.dart\" workspace=\"FikoYT.Yeni.Cag\">\nimport 'dart:async';\nimport 'package:flutter/material.dart';\nimport 'models/personel.dart';\nimport 'serial_service.dart';\nimport 'services/depolama.dart';\nimport 'services/okuma_mantigi.dart';\nimport 'screens/personel_ekle_screen.dart';\n\nvoid main() {\n  runApp(const KartOkuyucuApp());\n}\n\nclass KartOkuyucuApp extends StatelessWidget {\n  const KartOkuyucuApp({super.key});\n\n  @override\n  Widget build(BuildContext context) {\n    return MaterialApp(\n      title: 'FikoYT PDKS',\n      debugShowCheckedModeBanner: false,\n      theme: ThemeData.dark().copyWith(\n        scaffoldBackgroundColor: const Color(0xFF0D1117),\n        colorScheme: const ColorScheme.dark(\n          primary: Color(0xFF00E5FF),\n          secondary: Color(0xFF00BFA5),\n          surface: Color(0xFF161B22),\n          onSurface: Colors.white,\n        ),\n        cardColor: const Color(0xFF161B22),\n        dividerColor: const Color(0xFF30363D),\n      ),\n      home: const KartOkuyucuPage(),\n    );\n  }\n}\n\n// ─── Sabitler ───────────────────────────────────────────────────────────────\n\nconst _bgColor = Color(0xFF0D1117);\nconst _cardColor = Color(0xFF161B22);\nconst _borderColor = Color(0xFF30363D);\nconst _accentCyan = Color(0xFF00E5FF);\nconst _accentGreen = Color(0xFF00C853);\nconst _accentRed = Color(0xFFEF5350);\nconst _accentOrange = Color(0xFFFF9800);\nconst _textDim = Color(0xFF8B949E);\n\n// ─── Ana Sayfa ───────────────────────────────────────────────────────────────\n\nclass KartOkuyucuPage extends StatefulWidget {\n  const KartOkuyucuPage({super.key});\n\n  @override\n  State<KartOkuyucuPage> createState() => _KartOkuyucuPageState();\n}\n\nclass _KartOkuyucuPageState extends State<KartOkuyucuPage>\n    with TickerProviderStateMixin {\n  final SerialService _serialService = SerialService();\n  final OkumaMantigi _mantigi = OkumaMantigi();\n\n  // ── Durum ─────────────────────────────────────────────────────────────────\n  String _durum = 'Bağlanıyor...';\n  String? _port;\n  bool _bagliMi = false;\n  List<Map<String, dynamic>> _gecmis = [];\n  List<Personel> _personeller = [];\n  bool _personellerYukleniyor = true;\n\n  // Okunan kart bilgileri\n  Personel? _personel;\n  String _tip = '';\n  bool _kartTakili = false;\n\n  // ── Animasyon ─────────────────────────────────────────────────────────────\n  late final AnimationController _pulseCtrl;\n  late final AnimationController _kartCtrl;\n  late final Animation<double> _pulseAnim;\n  late final Animation<double> _kartAnim;\n\n  @override\n  void initState() {\n    super.initState();\n\n    _pulseCtrl = AnimationController(\n      vsync: this,\n      duration: const Duration(seconds: 2),\n    )..repeat(reverse: true);\n\n    _kartCtrl = AnimationController(\n      vsync: this,\n      duration: const Duration(milliseconds: 400),\n    );\n\n    _pulseAnim = Tween<double>(begin: 0.6, end: 1.0).animate(\n      CurvedAnimation(parent: _pulseCtrl, curve: Curves.easeInOut),\n    );\n    _kartAnim = Tween<double>(begin: 0.0, end: 1.0).animate(\n      CurvedAnimation(parent: _kartCtrl, curve: Curves.elasticOut),\n    );\n\n    _personelleriYukle();\n    _setupService();\n  }\n\n  Future<void> _personelleriYukle() async {\n    setState(() => _personellerYukleniyor = true);\n    try {\n      final liste = await Depolama.tumPersoneller();\n      if (!mounted) return;\n      _personeller = liste;\n      _mantigi.personelListesi = liste;\n    } catch (_) {}\n    if (!mounted) return;\n    setState(() => _personellerYukleniyor = false);\n  }\n\n  void _setupService() {\n    _serialService.onConnected = () {\n      if (!mounted) return;\n      setState(() {\n        _bagliMi = true;\n        _port = _serialService.connectedPort;\n        _durum = 'Bağlandı · ${_serialService.connectedPort}';\n      });\n    };\n\n    _serialService.onDataReceived = (data) {\n      if (!mounted) return;\n      final now = DateTime.now();\n      final zaman =\n          '${now.hour.toString().padLeft(2, '0')}:${now.minute.toString().padLeft(2, '0')}:${now.second.toString().padLeft(2, '0')}';\n\n      setState(() {\n        if (data.startsWith('KART_TAKILDI:')) {\n          final uid = data.substring(13);\n          _kartOkuBul(uid, zaman);\n        } else if (data.startsWith('KART_CIKTI:')) {\n          final uid = data.substring(11);\n          _kartCiktiBul(uid, zaman);\n        }\n      });\n    };\n\n    _serialService.onError = (err) {\n      if (!mounted) return;\n      setState(() {\n        _bagliMi = false;\n        _durum = 'Hata: $err';\n      });\n    };\n\n    Future.microtask(() async {\n      if (!_serialService.isConnected) {\n        await _serialService.connectAuto();\n      }\n    });\n  }\n\n  /// Bir kart okunduğunda giriş/çıkış belirle ve kaydet.\n  void _kartOkuBul(String uid, String zaman) {\n    final sonuc = _mantigi.kartOku(uid);\n    if (!sonuc.basarili) {\n      _personel = null;\n      _tip = '';\n      _kartTakili = true;\n      _durum = 'Tanınmayan Kart: $uid';\n      _kartCtrl.forward(from: 0);\n      return;\n    }\n\n    final personel = sonuc.personel!;\n    _personel = personel;\n    _tip = sonuc.tip;\n    _kartTakili = true;\n    _durum = sonuc.mesaj;\n    _kartCtrl.forward(from: 0);\n\n    // Bugünkü durumu güncelle ve kaydı kaydet\n    _mantigi.bugunDurumuGuncelle(uid, sonuc.tip);\n    Future.microtask(() async {\n      try {\n        await Depolama.bugunDurumuKaydet(_mantigi.bugunDurum);\n        await Depolama.kayitEk(OkumaKaydi(\n          personelId: uid,\n          uid: uid,\n          tip: sonuc.tip,\n          zaman: DateTime.now(),\n        ));\n      } catch (_) {}\n    });\n\n    _gecmis.insert(0, {\n      'zaman': zaman,\n      'uid': uid,\n      'isim': personel.isim,\n      'tip': sonuc.tip,\n      'departman': personel.departman,\n    });\n    _personelleriYukle();\n  }\n\n  void _kartCiktiBul(String uid, String zaman) {\n    // Çıkış bildirimi geldiğinde bugünkü durumu güncelle\n    Future.microtask(() async {\n      try {\n        final durum = await Depolama.bugunDurumu(uid);\n        if (durum.cikisYapilabilirMi) {\n          _mantigi.bugunDurumuGuncelle(uid, 'cikis');\n          await Depolama.bugunDurumuKaydet(_mantigi.bugunDurum);\n          await Depolama.kayitEk(OkumaKaydi(\n            personelId: uid,\n            uid: uid,\n            tip: 'cikis',\n            zaman: DateTime.now(),\n          ));\n        }\n      } catch (_) {}\n    });\n  }\n\n  Future<void> _yenidenBaglan() async {\n    setState(() {\n      _bagliMi = false;\n      _durum = 'Yeniden bağlanıyor...';\n    });\n    _serialService.disconnect();\n    await Future.delayed(const Duration(milliseconds: 800));\n    if (mounted) _setupService();\n  }\n\n  void _personelEkle() {\n    showModalBottomSheet(\n      context: context,\n      backgroundColor: const Color(0xFF161B22),\n      isScrollControlled: true,\n      builder: (ctx) => Padding(\n        padding: EdgeInsets.only(\n          bottom: MediaQuery.of(ctx).padding.bottom,\n        ),\n        child: PersonelEkleScreen(\n          mantigi: _mantigi,\n          onClose: () => Navigator.pop(ctx),\n        ),\n      ),\n    );\n  }\n\n  @override\n  void dispose() {\n    _pulseCtrl.dispose();\n    _kartCtrl.dispose();\n    _serialService.disconnect();\n    super.dispose();\n  }\n\n  // ─── BUILD ────────────────────────────────────────────────────────────────\n\n  @override\n  Widget build(BuildContext context) {\n    return Scaffold(\n      backgroundColor: _bgColor,\n      body: Column(\n        children: [\n          _buildHeader(),\n          Expanded(\n            child: Row(\n              children: [\n                // Sol panel – kart okuyucu\n                Expanded(flex: 3, child: _buildKartPanel()),\n                // Sağ panel – geçmiş\n                Expanded(flex: 2, child: _buildGecmisPanel()),\n              ],\n            ),\n          ),\n        ],\n      ),\n    );\n  }\n\n  // ── Header ────────────────────────────────────────────────────────────────\n  Widget _buildHeader() {\n    return Container(\n      height: 56,\n      padding: const EdgeInsets.symmetric(horizontal: 24),\n      decoration: const BoxDecoration(\n        color: _cardColor,\n        border: Border(bottom: BorderSide(color: _borderColor)),\n      ),\n      child: Row(\n        children: [\n          const Icon(Icons.contactless, color: _accentCyan, size: 22),\n          const SizedBox(width: 10),\n          const Text(\n            'FikoYT',\n            style: TextStyle(\n              color: _accentCyan,\n              fontSize: 16,\n              fontWeight: FontWeight.w700,\n              letterSpacing: 1.5,\n            ),\n          ),\n          const Text(\n            ' PDKS',\n            style: TextStyle(color: Colors.white70, fontSize: 16, letterSpacing: 1),\n          ),\n          const Spacer(),\n          _buildBaglantiChip(),\n          const SizedBox(width: 12),\n          IconButton(\n            icon: const Icon(Icons.add_circle_outline_rounded, size: 22),\n            color: _textDim,\n            tooltip: 'Personel Ekle',\n            onPressed: _personelEkle,\n          ),\n          IconButton(\n            icon: const Icon(Icons.refresh_rounded, size: 20),\n            color: _textDim,\n            tooltip: 'Yeniden Bağlan',\n            onPressed: _yenidenBaglan,\n          ),\n        ],\n      ),\n    );\n  }\n\n  Widget _buildBaglantiChip() {\n    final renk = _bagliMi ? _accentGreen : _accentRed;\n    final label = _bagliMi ? (_port ?? 'Bağlı') : 'Bağlı Değil';\n    return AnimatedBuilder(\n      animation: _pulseAnim,\n      builder: (_, __) => Container(\n        padding: const EdgeInsets.symmetric(horizontal: 10, vertical: 4),\n        decoration: BoxDecoration(\n          color: renk.withOpacity(0.12),\n          borderRadius: BorderRadius.circular(20),\n          border: Border.all(color: renk.withOpacity(0.4)),\n        ),\n        child: Row(\n          mainAxisSize: MainAxisSize.min,\n          children: [\n            Container(\n              width: 6,\n              height: 6,\n              decoration: BoxDecoration(\n                shape: BoxShape.circle,\n                color: renk.withOpacity(_bagliMi ? _pulseAnim.value : 1.0),\n              ),\n            ),\n            const SizedBox(width: 6),\n            Text(label,\n                style: TextStyle(color: renk, fontSize: 12, fontWeight: FontWeight.w600)),\n          ],\n        ),\n      ),\n    );\n  }\n\n  // ── Kart Paneli ───────────────────────────────────────────────────────────\n  Widget _buildKartPanel() {\n    return Padding(\n      padding: const EdgeInsets.all(24),\n      child: Column(\n        crossAxisAlignment: CrossAxisAlignment.stretch,\n        children: [\n          Expanded(child: _buildKartOkuyucu()),\n          const SizedBox(height: 16),\n          _buildInfoRow(),\n        ],\n      ),\n    );\n  }\n\n  Widget _buildKartOkuyucu() {\n    final Color renk = _kartTakili ? _accentGreen : _accentCyan;\n    return Container(\n      decoration: BoxDecoration(\n        color: _cardColor,\n        borderRadius: BorderRadius.circular(20),\n        border: Border.all(color: _borderColor),\n      ),\n      child: Column(\n        mainAxisAlignment: MainAxisAlignment.center,\n        children: [\n          // Kart ikonu – animasyonlu\n          AnimatedBuilder(\n            animation: Listenable.merge([_pulseAnim, _kartAnim]),\n            builder: (_, __) {\n              final glow = _kartTakili ? _kartAnim.value : _pulseAnim.value * 0.5;\n              return Stack(\n                alignment: Alignment.center,\n                children: [\n                  if (_kartTakili)\n                    ...List.generate(3, (i) {\n                      return Container(\n                        width: 120.0 + i * 40,\n                        height: 120.0 + i * 40,\n                        decoration: BoxDecoration(\n                          shape: BoxShape.circle,\n                          border: Border.all(\n                            color: renk.withOpacity(\n                                (1 - i * 0.3) * _kartAnim.value * 0.3),\n                            width: 1.5,\n                          ),\n                        ),\n                      );\n                    }),\n                  // İç daire\n                  Container(\n                    width: 110,\n                    height: 110,\n                    decoration: BoxDecoration(\n                      shape: BoxShape.circle,\n                      color: renk.withOpacity(0.08 + glow * 0.1),\n                      border: Border.all(\n                          color: renk.withOpacity(0.4 + glow * 0.4), width: 2),\n                    ),\n                    child: Icon(\n                      _kartTakili ? Icons.credit_card : Icons.contactless_outlined,\n                      size: 48,\n                      color: renk.withOpacity(0.7 + glow * 0.3),\n                    ),\n                  ),\n                ],\n              );\n            },\n          ),\n          const SizedBox(height: 28),\n          // Durum yazısı\n          Text(\n            _takiliMi() ? 'KART OKUNDU' : 'KART BEKLENİYOR',\n            style: TextStyle(\n              color: _takiliMi() ? _accentGreen : _textDim,\n              fontSize: 13,\n              fontWeight: FontWeight.w700,\n              letterSpacing: 3,\n            ),\n          ),\n          const SizedBox(height: 12),\n          // UID gösterimi\n          AnimatedSwitcher(\n            duration: const Duration(milliseconds: 300),\n            child: Text(\n              _takiliMi() ? _kartUidGoster() : '• • • • • • • •',\n              key: ValueKey(_kartUidGoster() + _takiliMi().toString()),\n              style: TextStyle(\n                color: _takiliMi() ? Colors.white : _textDim,\n                fontSize: _takiliMi() ? 20 : 18,\n                fontWeight: FontWeight.w300,\n                fontFamily: 'monospace',\n                letterSpacing: 3,\n              ),\n            ),\n          ),\n        ],\n      ),\n    );\n  }\n\n  bool _takiliMi() => _kartTakili;\n  String _kartUidGoster() => _personel?.id ?? '-';\n\n  Widget _buildInfoRow() {\n    return Row(\n      children: [\n        Expanded(child: _buildInfoKart(\n          Icons.people_rounded,\n          'Personel',\n          '${_personeller.length}',\n          _accentCyan,\n        )),\n        const SizedBox(width: 12),\n        Expanded(child: _buildInfoKart(\n          Icons.login_rounded,\n          'Giriş',\n          '${_gecmis.where((e) => e['tip'] == 'giris').length}',\n          _accentGreen,\n        )),\n        const SizedBox(width: 12),\n        Expanded(child: _buildInfoKart(\n          Icons.logout_rounded,\n          'Çıkış',\n          '${_gecmis.where((e) => e['tip'] == 'cikis').length}',\n          _accentOrange,\n        )),\n      ],\n    );\n  }\n\n  Widget _buildInfoKart(IconData icon, String baslik, String deger, Color renk) {\n    return Container(\n      padding: const EdgeInsets.symmetric(vertical: 14, horizontal: 12),\n      decoration: BoxDecoration(\n        color: _cardColor,\n        borderRadius: BorderRadius.circular(12),\n        border: Border.all(color: _borderColor),\n      ),\n      child: Column(\n        children: [\n          Icon(icon, color: renk, size: 20),\n          const SizedBox(height: 6),\n          Text(deger, style: TextStyle(color: renk, fontSize: 22, fontWeight: FontWeight.w700)),\n          const SizedBox(height: 2),\n          Text(baslik, style: const TextStyle(color: _textDim, fontSize: 11)),\n        ],\n      ),\n    );\n  }\n\n  // ── Geçmiş Paneli ─────────────────────────────────────────────────────────\n  Widget _buildGecmisPanel() {\n    return Container(\n      margin: const EdgeInsets.fromLTRB(0, 24, 24, 24),\n      decoration: BoxDecoration(\n        color: _cardColor,\n        borderRadius: BorderRadius.circular(20),\n        border: Border.all(color: _borderColor),\n      ),\n      child: Column(\n        children: [\n          // Panel başlığı\n          Padding(\n            padding: const EdgeInsets.fromLTRB(16, 14, 8, 14),\n            child: Row(\n              children: [\n                const Icon(Icons.format_list_bulleted_rounded, color: _accentCyan, size: 18),\n                const SizedBox(width: 8),\n                const Text('Kart Geçmişi',\n                    style: TextStyle(color: Colors.white, fontWeight: FontWeight.w600, fontSize: 14)),\n                const Spacer(),\n                if (_gecmis.isNotEmpty)\n                  TextButton.icon(\n                    onPressed: () => setState(() => _gecmis.clear()),\n                    icon: const Icon(Icons.delete_outline_rounded, size: 15),\n                    label: const Text('Temizle', style: TextStyle(fontSize: 12)),\n                    style: TextButton.styleFrom(\n                      foregroundColor: _textDim,\n                      padding: const EdgeInsets.symmetric(horizontal: 8),\n                    ),\n                  ),\n              ],\n            ),\n          ),\n          const Divider(color: _borderColor, height: 1),\n          // Liste\n          Expanded(\n            child: _gecmis.isEmpty\n                ? Center(\n                    child: Column(\n                      mainAxisSize: MainAxisSize.min,\n                      children: [\n                        Icon(Icons.contactless_outlined, color: _textDim.withOpacity(0.3), size: 48),\n                        const SizedBox(height: 12),\n                        const Text('Henüz kart okutulmadı',\n                            style: TextStyle(color: _textDim, fontSize: 13)),\n                      ],\n                    ),\n                  )\n                : ListView.separated(\n                    padding: const EdgeInsets.symmetric(vertical: 8),\n                    itemCount: _gecmis.length,\n                    separatorBuilder: (_, __) =>\n                        const Divider(color: _borderColor, height: 1, indent: 16, endIndent: 16),\n                    itemBuilder: (_, i) => _buildGecmisItem(_gecmis[i], i),\n                  ),\n          ),\n        ],\n      ),\n    );\n  }\n\n  Widget _buildGecmisItem(Map<String, dynamic> kayit, int index) {\n    final isGiris = kayit['tip'] == 'giris';\n    final renk = isGiris ? _accentGreen : _accentOrange;\n    final icon = isGiris ? Icons.login_rounded : Icons.logout_rounded;\n\n    return Container(\n      padding: const EdgeInsets.symmetric(horizontal: 16, vertical: 10),\n      color: index == 0 ? renk.withOpacity(0.04) : Colors.transparent,\n      child: Row(\n        children: [\n          Container(\n            width: 32,\n            height: 32,\n            decoration: BoxDecoration(\n              color: renk.withOpacity(0.12),\n              borderRadius: BorderRadius.circular(8),\n            ),\n            child: Icon(icon, color: renk, size: 16),\n          ),\n          const SizedBox(width: 12),\n          Expanded(\n            child: Column(\n              crossAxisAlignment: CrossAxisAlignment.start,\n              children: [\n                Text(\n                  kayit['isim'] as String? ?? 'Bilinmiyor',\n                  style: const TextStyle(\n                    color: Colors.white,\n                    fontSize: 13,\n                    fontWeight: FontWeight.w600,\n                  ),\n                ),\n                const SizedBox(height: 2),\n                Text(\n                  '${isGiris ? \"Giriş\" : \"Çıkış\"} · ${kayit['zaman']}',\n                  style: const TextStyle(color: _textDim, fontSize: 11),\n                ),\n              ],\n            ),\n          ),\n          if (index == 0)\n            Container(\n              padding: const EdgeInsets.symmetric(horizontal: 6, vertical: 2),\n              decoration: BoxDecoration(\n                color: renk.withOpacity(0.15),\n                borderRadius: BorderRadius.circular(4),\n              ),\n              child: Text('YENİ',\n                  style: TextStyle(color: renk, fontSize: 9, fontWeight: FontWeight.w700)),\n            ),\n        ],\n      ),\n    );\n  }\n}\n\n</file_content>",
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