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.

test/interpreter_persona_test.dart

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+import 'package:flutter_test/flutter_test.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'package:words999/models/history_entry_model.dart';
+import 'package:words999/models/interpreter_persona.dart';
+import 'package:words999/services/ai_oracle_service.dart';
+import 'package:words999/services/settings_repository.dart';
+
+void main() {
+  TestWidgetsFlutterBinding.ensureInitialized();
+
+  setUp(() async {
+    SharedPreferences.setMockInitialValues({});
+    await SettingsRepository().init();
+    await SettingsRepository().setPersonaId(InterpreterPersona.defaultId);
+    await SettingsRepository().setRandomOrgApiKey('');
+  });
+
+  test('unknown persona id falls back to clear oracle', () {
+    expect(InterpreterPersona.byId('nope').id, InterpreterPersona.clear.id);
+  });
+
+  test('settings persist the selected interpreter voice', () async {
+    await SettingsRepository().setPersonaId(InterpreterPersona.orc.id);
+    expect(SettingsRepository().persona.id, InterpreterPersona.orc.id);
+
+    SharedPreferences.setMockInitialValues({
+      'oracle_interpreter_persona_v1': InterpreterPersona.techpriest.id,
+    });
+    await SettingsRepository().init();
+    expect(SettingsRepository().persona.title, 'Техножрец');
+  });
+
+  test('interpretation prompt uses the selected voice and asks for a concrete step', () async {
+    await SettingsRepository().setPersonaId(InterpreterPersona.analyst.id);
+    final messages = AiOracleService().buildInterpretationMessages(
+      question: 'Стоит ли уходить?',
+      words: const [
+        SessionWord(
+          word: 'огонь',
+          sessionNumber: 0,
+          partOfSpeech: 'существительное',
+          category: 'Образ / Архетип',
+          symbolicMeaning: 'Очищающее пламя',
+        ),
+      ],
+    );
+
+    expect(messages.first.role.name, 'system');
+    expect(messages.first.content, contains('психоаналитик'));
+    expect(messages.last.content, contains('проверяемый шаг'));
+    expect(messages.last.content, contains('ОГОНЬ'));
+    expect(messages.last.content, contains('Стоит ли уходить?'));
+    expect(messages.first.content.toLowerCase(), isNot(contains('голос самой вечности')));
+  });
+}