feat(data): modèle de données Drift pour la persistance locale

Définit les tables Drift et les identifiants locaux (local_id.dart,
tables.dart), régénère app_database.g.dart. build_runner, flutter analyze
et build APK debug validés.

Versionne les fichiers générés .g.dart : projet solo sans pipeline CI qui
relance build_runner, on privilégie un clone immédiatement buildable.
Retire la règle **/*.g.dart (et freezed/gr.dart, non utilisés) du
.gitignore en conséquence.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

lib/infrastructure/local/app_database.dart

@@ -1,16 +1,35 @@
 import 'package:drift/drift.dart';
 import 'package:drift_flutter/drift_flutter.dart';
 
-final class AppDatabase extends GeneratedDatabase {
-  AppDatabase(DatabaseConnection connection) : super.connect(connection);
+import 'tables.dart';
+
+part 'app_database.g.dart';
+
+@DriftDatabase(
+  tables: [
+    ActiveRestStates,
+    ActiveSetResults,
+    ActiveWorkoutSessions,
+    ChangeLogEntries,
+    Exercises,
+    MediaAssets,
+    ProgramExercises,
+    Programs,
+    WorkoutHistories,
+    WorkoutHistorySetResults,
+    WorkoutTemplateExerciseOverrides,
+    WorkoutTemplatePrograms,
+    WorkoutTemplates,
+  ],
+)
+final class AppDatabase extends _$AppDatabase {
+  AppDatabase(super.executor);
 
   factory AppDatabase.open() {
     return AppDatabase(
       driftDatabase(
         name: 'gametime',
-        native: const DriftNativeOptions(
-          shareAcrossIsolates: true,
-        ),
+        native: const DriftNativeOptions(shareAcrossIsolates: true),
       ),
     );
   }
@@ -19,5 +38,95 @@ final class AppDatabase extends GeneratedDatabase {
   int get schemaVersion => 1;
 
   @override
-  Iterable<TableInfo<Table, dynamic>> get allTables => const [];
+  MigrationStrategy get migration {
+    return MigrationStrategy(
+      onCreate: (migrator) async {
+        await migrator.createAll();
+        await _createIndexes();
+      },
+      beforeOpen: (details) async {
+        await customStatement('PRAGMA foreign_keys = ON');
+      },
+    );
+  }
+
+  Future<void> _createIndexes() async {
+    for (final tableName in _syncableTableNames) {
+      await customStatement(
+        'CREATE INDEX IF NOT EXISTS idx_${tableName}_deleted_at '
+        'ON $tableName (deleted_at)',
+      );
+      await customStatement(
+        'CREATE INDEX IF NOT EXISTS idx_${tableName}_updated_at '
+        'ON $tableName (updated_at)',
+      );
+      await customStatement(
+        'CREATE INDEX IF NOT EXISTS idx_${tableName}_sync_state '
+        'ON $tableName (sync_state)',
+      );
+      await customStatement(
+        'CREATE INDEX IF NOT EXISTS idx_${tableName}_local_revision '
+        'ON $tableName (local_revision)',
+      );
+    }
+
+    await customStatement(
+      'CREATE INDEX IF NOT EXISTS idx_program_exercises_program_id '
+      'ON program_exercises (program_id)',
+    );
+    await customStatement(
+      'CREATE INDEX IF NOT EXISTS idx_workout_template_programs_template_id '
+      'ON workout_template_programs (workout_template_id)',
+    );
+    await customStatement(
+      'CREATE INDEX IF NOT EXISTS idx_active_set_results_session_id '
+      'ON active_set_results (active_workout_session_id)',
+    );
+    await customStatement(
+      'CREATE INDEX IF NOT EXISTS idx_active_rest_states_session_id '
+      'ON active_rest_states (active_workout_session_id)',
+    );
+    await customStatement(
+      'CREATE UNIQUE INDEX IF NOT EXISTS '
+      'idx_active_workout_sessions_single_open '
+      'ON active_workout_sessions ((1)) '
+      'WHERE deleted_at IS NULL '
+      "AND status IN ('running', 'paused', 'savedExit')",
+    );
+    await customStatement(
+      'CREATE INDEX IF NOT EXISTS idx_workout_history_started_at '
+      'ON workout_history (started_at)',
+    );
+    await customStatement(
+      'CREATE INDEX IF NOT EXISTS idx_workout_history_set_results_history_id '
+      'ON workout_history_set_results (workout_history_id)',
+    );
+    await customStatement(
+      'CREATE INDEX IF NOT EXISTS idx_change_log_entity '
+      'ON change_log (entity_type, entity_id)',
+    );
+    await customStatement(
+      'CREATE INDEX IF NOT EXISTS idx_change_log_local_revision '
+      'ON change_log (local_revision)',
+    );
+    await customStatement(
+      'CREATE INDEX IF NOT EXISTS idx_change_log_synced_at '
+      'ON change_log (synced_at)',
+    );
+  }
 }
+
+const _syncableTableNames = [
+  'active_rest_states',
+  'active_set_results',
+  'active_workout_sessions',
+  'exercises',
+  'media_assets',
+  'program_exercises',
+  'programs',
+  'workout_history',
+  'workout_history_set_results',
+  'workout_template_exercise_overrides',
+  'workout_template_programs',
+  'workout_templates',
+];