Notrufnummern-Datenbasis, Ländererkennung, State-Management und Lokalisierung (AP1-AP7)

Implementiert den kompletten Kern-Flow der Emergency App gemäß docs/plan.md:
- Notrufnummern-Datenbasis für 199 Länder + Modelle/Repository (AP1)
- DialerService für tel:-Notrufe ohne Auto-Dial (AP2)
- Statisches UI mit Panik-Button-Fallback (AP3)
- Priorisierte Ländererkennung: SIM/Netz -> GPS/Geocoding -> Cache (AP4)
- EmergencyProvider verdrahtet Repository/LocationService mit der UI (AP5)
- Manuelle Länderauswahl als Fallback samt eigener Priorität (AP6)
- UI-Lokalisierung (de/en/fr/es), an erkanntes Land gekoppelt (AP7)

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

test/models/country_test.dart

@@ -0,0 +1,57 @@
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:emergency/models/country.dart';
+import 'package:emergency/models/emergency_type.dart';
+
+void main() {
+  group('Country.fromJson', () {
+    test('parst ein Land mit mehreren Notrufnummern korrekt', () {
+      final country = Country.fromJson('DE', {
+        'name_en': 'Germany',
+        'name_de': 'Deutschland',
+        'flag': '🇩🇪',
+        'numbers': [
+          {
+            'type': 'general',
+            'number': '112',
+            'label_de': 'Notruf',
+            'label_en': 'Emergency',
+          },
+          {
+            'type': 'police',
+            'number': '110',
+            'label_de': 'Polizei',
+            'label_en': 'Police',
+          },
+        ],
+      });
+
+      expect(country.isoCode, 'DE');
+      expect(country.nameDe, 'Deutschland');
+      expect(country.nameEn, 'Germany');
+      expect(country.flag, '🇩🇪');
+      expect(country.numbers, hasLength(2));
+      expect(country.numbers[0].type, EmergencyType.general);
+      expect(country.numbers[1].type, EmergencyType.police);
+    });
+
+    test('parst ein Land mit nur einer Notrufnummer korrekt', () {
+      final country = Country.fromJson('US', {
+        'name_en': 'United States',
+        'name_de': 'Vereinigte Staaten',
+        'flag': '🇺🇸',
+        'numbers': [
+          {
+            'type': 'general',
+            'number': '911',
+            'label_de': 'Notruf',
+            'label_en': 'Emergency',
+          },
+        ],
+      });
+
+      expect(country.numbers, hasLength(1));
+      expect(country.numbers.single.number, '911');
+    });
+  });
+}

test/models/emergency_number_test.dart

@@ -0,0 +1,40 @@
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:emergency/models/emergency_number.dart';
+import 'package:emergency/models/emergency_type.dart';
+
+void main() {
+  group('EmergencyNumber.fromJson', () {
+    test('parst gültiges JSON korrekt', () {
+      final number = EmergencyNumber.fromJson({
+        'type': 'police',
+        'number': '110',
+        'label_de': 'Polizei',
+        'label_en': 'Police',
+      });
+
+      expect(number.type, EmergencyType.police);
+      expect(number.number, '110');
+      expect(number.labelDe, 'Polizei');
+      expect(number.labelEn, 'Police');
+    });
+
+    test('zwei inhaltsgleiche Instanzen sind gleich', () {
+      final a = EmergencyNumber.fromJson({
+        'type': 'general',
+        'number': '112',
+        'label_de': 'Notruf',
+        'label_en': 'Emergency',
+      });
+      final b = EmergencyNumber.fromJson({
+        'type': 'general',
+        'number': '112',
+        'label_de': 'Notruf',
+        'label_en': 'Emergency',
+      });
+
+      expect(a, equals(b));
+      expect(a.hashCode, equals(b.hashCode));
+    });
+  });
+}

test/models/emergency_type_test.dart

@@ -0,0 +1,26 @@
+import 'package:flutter_test/flutter_test.dart';
+
+import 'package:emergency/models/emergency_type.dart';
+
+void main() {
+  group('EmergencyType', () {
+    test('fromJson mappt alle bekannten Werte korrekt', () {
+      expect(EmergencyType.fromJson('general'), EmergencyType.general);
+      expect(EmergencyType.fromJson('police'), EmergencyType.police);
+      expect(EmergencyType.fromJson('fire'), EmergencyType.fire);
+      expect(EmergencyType.fromJson('ambulance'), EmergencyType.ambulance);
+      expect(EmergencyType.fromJson('sea_rescue'), EmergencyType.seaRescue);
+      expect(EmergencyType.fromJson('mountain_rescue'), EmergencyType.mountainRescue);
+    });
+
+    test('fromJson wirft FormatException bei unbekanntem Wert', () {
+      expect(() => EmergencyType.fromJson('unknown'), throwsFormatException);
+    });
+
+    test('toJson ist invers zu fromJson', () {
+      for (final type in EmergencyType.values) {
+        expect(EmergencyType.fromJson(type.toJson()), type);
+      }
+    });
+  });
+}