feat: Random.org dice and daily word matrix, interpreter voices, curated lexicon

Wire cleromancy rolls and the once-per-UTC-day 000-999 word shuffle to RANDOM.ORG JSON-RPC, with a local CSPRNG fallback. Add settings for interpreter personas and a cleaner default oracle prompt. Replace proper names and bureaucratic filler in the 1000-word lexicon with sacred symbols.

lib/main.dart

@@ -4,6 +4,8 @@ import 'screens/history_screen.dart';
 import 'screens/home_search_screen.dart';
 import 'screens/oracle_chat_screen.dart';
 import 'screens/provider_bakeoff_screen.dart';
+import 'screens/settings_screen.dart';
+import 'services/settings_repository.dart';
 import 'services/words_repository.dart';
 import 'widgets/gradient_star_badge.dart';
 
@@ -19,6 +21,7 @@ import 'g4f/providers/phind_ai.dart';
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
   await WordsRepository().init();
+  await SettingsRepository().init();
   runApp(const Words999App());
 }
 
@@ -104,6 +107,7 @@ class _MainNavigationContainerState extends State<MainNavigationContainer> {
   final List<Widget> _screens = const [
     HomeSearchScreen(),
     HistoryScreen(),
+    SettingsScreen(),
   ];
 
   @override
@@ -130,6 +134,11 @@ class _MainNavigationContainerState extends State<MainNavigationContainer> {
             selectedIcon: GradientStar(size: 22),
             label: 'История',
           ),
+          NavigationDestination(
+            icon: Icon(Icons.tune_rounded),
+            selectedIcon: GradientStar(size: 22),
+            label: 'Настройки',
+          ),
         ],
       ),
       floatingActionButton: GestureDetector(