feat(sprint-13.C mobile 2026-04-25): feature reporting (rapports trimestriels Contrôleur Interne)

Mobile mirror du backend P2-NEW-3. DRY strict — Clean Architecture identique aux autres features (compliance, devise).

Domain
- StatutRapport enum (draft, signe, archive, inconnu) + extension StatutRapportX (code/libelle/severite/fromCode)
- RapportTrimestriel entity (Equatable) + helpers libellePeriode, scoreSeverite (>=80 success, >=60 warning, <60 danger)

Data
- RapportTrimestrielModel.fromJson (parsing tolérant null + dates ISO)
- ReportingRemoteDataSourceImpl (Dio) : lister/generer/signer/archiver/telechargerPdf
- ReportingRepositoryImpl @Injectable

Presentation
- ReportingBloc : Load/Generer/Signer/Archiver events, 4 states (Initial/Loading/Loaded/Error)
- RapportsTrimestrielsPage : Material 3 ListView avec cards (period, score coloré, tag statut, hash tronqué) + EmptyView + ErrorView

Tests (10/10 verts)
- StatutRapportX × 2 (fromCode parse/null/inconnu, libelle/severite/code)
- RapportTrimestriel × 5 (libellePeriode, estDraft/estSigne/estArchive, scoreSeverite × 3)
- RapportTrimestrielModel.fromJson × 3 (complet, fallbacks, date invalide)

Note : viewer PDF interne reporté à un sprint dédié (intégration pdfx + permission storage Android). Téléchargement bytes via API exposé dans datasource pour usage futur.

lib/features/reporting/presentation/bloc/reporting_bloc.dart

@@ -0,0 +1,129 @@
+import 'package:equatable/equatable.dart';
+import 'package:flutter_bloc/flutter_bloc.dart';
+import 'package:injectable/injectable.dart';
+import '../../../../core/utils/logger.dart';
+import '../../domain/entities/rapport_trimestriel.dart';
+import '../../domain/repositories/reporting_repository.dart';
+
+// ── Events ───────────────────────────────────────────────────────────
+abstract class ReportingEvent extends Equatable {
+  const ReportingEvent();
+  @override
+  List<Object?> get props => [];
+}
+
+class LoadRapports extends ReportingEvent {
+  final int? annee;
+  const LoadRapports({this.annee});
+  @override
+  List<Object?> get props => [annee];
+}
+
+class GenererRapport extends ReportingEvent {
+  final int annee;
+  final int trimestre;
+  const GenererRapport({required this.annee, required this.trimestre});
+  @override
+  List<Object?> get props => [annee, trimestre];
+}
+
+class SignerRapport extends ReportingEvent {
+  final String id;
+  final String signataireId;
+  const SignerRapport({required this.id, required this.signataireId});
+  @override
+  List<Object?> get props => [id, signataireId];
+}
+
+class ArchiverRapport extends ReportingEvent {
+  final String id;
+  const ArchiverRapport(this.id);
+  @override
+  List<Object?> get props => [id];
+}
+
+// ── States ───────────────────────────────────────────────────────────
+abstract class ReportingState extends Equatable {
+  const ReportingState();
+  @override
+  List<Object?> get props => [];
+}
+
+class ReportingInitial extends ReportingState {
+  const ReportingInitial();
+}
+
+class ReportingLoading extends ReportingState {
+  const ReportingLoading();
+}
+
+class ReportingLoaded extends ReportingState {
+  final List<RapportTrimestriel> rapports;
+  final int annee;
+  const ReportingLoaded({required this.rapports, required this.annee});
+  @override
+  List<Object?> get props => [rapports, annee];
+}
+
+class ReportingError extends ReportingState {
+  final String message;
+  const ReportingError(this.message);
+  @override
+  List<Object?> get props => [message];
+}
+
+// ── Bloc ─────────────────────────────────────────────────────────────
+@injectable
+class ReportingBloc extends Bloc<ReportingEvent, ReportingState> {
+  final ReportingRepository repository;
+
+  ReportingBloc(this.repository) : super(const ReportingInitial()) {
+    on<LoadRapports>(_onLoad);
+    on<GenererRapport>(_onGenerer);
+    on<SignerRapport>(_onSigner);
+    on<ArchiverRapport>(_onArchiver);
+  }
+
+  Future<void> _onLoad(LoadRapports event, Emitter<ReportingState> emit) async {
+    emit(const ReportingLoading());
+    try {
+      final annee = event.annee ?? DateTime.now().year;
+      final rapports = await repository.lister(annee: annee);
+      emit(ReportingLoaded(rapports: rapports, annee: annee));
+    } catch (e, st) {
+      AppLogger.error('ReportingBloc: load', error: e, stackTrace: st);
+      emit(ReportingError(e.toString()));
+    }
+  }
+
+  Future<void> _onGenerer(GenererRapport event, Emitter<ReportingState> emit) async {
+    final current = state;
+    try {
+      await repository.generer(annee: event.annee, trimestre: event.trimestre);
+      // Reload list
+      add(LoadRapports(annee: current is ReportingLoaded ? current.annee : event.annee));
+    } catch (e) {
+      emit(ReportingError(e.toString()));
+    }
+  }
+
+  Future<void> _onSigner(SignerRapport event, Emitter<ReportingState> emit) async {
+    final current = state;
+    try {
+      await repository.signer(event.id, event.signataireId);
+      add(LoadRapports(annee: current is ReportingLoaded ? current.annee : null));
+    } catch (e) {
+      emit(ReportingError(e.toString()));
+    }
+  }
+
+  Future<void> _onArchiver(ArchiverRapport event, Emitter<ReportingState> emit) async {
+    final current = state;
+    try {
+      await repository.archiver(event.id);
+      add(LoadRapports(annee: current is ReportingLoaded ? current.annee : null));
+    } catch (e) {
+      emit(ReportingError(e.toString()));
+    }
+  }
+}