feat: app Flutter GameManager (OIDC pocket-id, contrôle serveurs, MOTD live, auto-update) + CI APK signée

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

lib/services/update_service.dart

@@ -0,0 +1,43 @@
+import 'dart:convert';
+
+import 'package:http/http.dart' as http;
+import 'package:ota_update/ota_update.dart';
+import 'package:package_info_plus/package_info_plus.dart';
+
+/// Vérifie s'il existe une version plus récente (API `/version`) et, si oui,
+/// télécharge + installe l'APK (hors Play Store).
+class UpdateService {
+  UpdateService(this._baseUrl);
+  final Future<String> _baseUrl;
+
+  Future<UpdateInfo?> check() async {
+    try {
+      final base = await _baseUrl;
+      final res = await http.get(Uri.parse('$base/version')).timeout(const Duration(seconds: 6));
+      if (res.statusCode != 200) return null;
+      final data = jsonDecode(res.body) as Map<String, dynamic>;
+      final remote = data['version_code'] as int? ?? 0;
+      final info = await PackageInfo.fromPlatform();
+      final current = int.tryParse(info.buildNumber) ?? 0;
+      if (remote > current) {
+        return UpdateInfo(
+          version: data['version'] as String? ?? '?',
+          apkUrl: data['apk_url'] as String? ?? '$base/download/apk',
+          notes: data['notes'] as String? ?? '',
+        );
+      }
+    } catch (_) {/* pas de réseau / pas d'update → on ignore */}
+    return null;
+  }
+
+  /// Lance le téléchargement + l'installation ; renvoie le flux de progression.
+  Stream<OtaEvent> apply(UpdateInfo info) =>
+      OtaUpdate().execute(info.apkUrl, destinationFilename: 'gamemanager.apk');
+}
+
+class UpdateInfo {
+  UpdateInfo({required this.version, required this.apkUrl, required this.notes});
+  final String version;
+  final String apkUrl;
+  final String notes;
+}