Synchronize the client and select installed language packs (#3)

The launcher synchronizes the current native client, retains manifest-listed ruRU archives and launches the game with WOW_LOCALE=auto. Includes the prepared cleanup of obsolete Extentions directories in both client roots while preserving manifest-required files and unrelated user state.

Version: 1.0.7+10. Deployment now judges native OpenSSL commands by their exit codes while retaining key and signature verification.

Verified on Windows through FVM: full format/analyze, all 76 tests, production dry run, x64 runtime imports and DSA installer signature. The original dirty checkout was preserved. Publication follows the localized client release.

lib/features/launcher/application/client_sync_use_case.dart

@@ -2,7 +2,6 @@ import 'dart:async';
 import 'dart:io';
 
 import 'package:injectable/injectable.dart';
-import 'package:moonwell_launcher/config.dart';
 import 'package:moonwell_launcher/core/use_case.dart';
 import 'package:moonwell_launcher/features/downloader/domain/entities/download_exceptions.dart';
 import 'package:moonwell_launcher/features/downloader/domain/entities/download_progress.dart';
@@ -117,7 +116,7 @@ class ClientSyncUseCase
       await _throwIfCancelled(input.isCancelled);
 
       final filesToDownload = _resolveFilesToDownload(manifest, localSnapshot);
-      final staleFiles = _resolveStaleFiles(manifest, localSnapshot);
+      final staleFiles = localSnapshot.stalePaths;
 
       _emit(
         controller,
@@ -275,24 +274,6 @@ class ClientSyncUseCase
     }).toList();
   }
 
-  List<String> _resolveStaleFiles(
-    ClientManifest manifest,
-    ClientInstallationSnapshot snapshot,
-  ) {
-    final remoteFiles = manifest.filesByPath;
-
-    return snapshot.files
-        .where((localFile) {
-          if (remoteFiles.containsKey(localFile.path)) {
-            return false;
-          }
-
-          return !_isIgnored(localFile.path);
-        })
-        .map((file) => file.path)
-        .toList();
-  }
-
   Future<void> _removeStaleFiles({
     required StreamController<ClientSyncStatus> controller,
     required String installationDir,
@@ -471,13 +452,7 @@ class ClientSyncUseCase
       return isMismatched;
     }).toList();
 
-    final extraFiles = snapshot.files.where((localFile) {
-      if (manifest.filesByPath.containsKey(localFile.path)) {
-        return false;
-      }
-
-      return !_isIgnored(localFile.path);
-    }).toList();
+    final extraFiles = snapshot.stalePaths;
 
     if (snapshot.buildHash != remoteBuildHash ||
         mismatchedFiles.isNotEmpty ||
@@ -493,14 +468,16 @@ class ClientSyncUseCase
                 .map((file) => file.path)
                 .take(10)
                 .toList(),
-            'extraFiles': extraFiles.map((file) => file.path).take(10).toList(),
+            'extraFiles': extraFiles.take(10).toList(),
           },
         ),
       );
 
       final firstProblemPath = mismatchedFiles.isNotEmpty
           ? mismatchedFiles.first.path
-          : extraFiles.first.path;
+          : extraFiles.isNotEmpty
+          ? extraFiles.first
+          : 'buildHash';
       throw LauncherSyncException(
         'Client verification failed after update: $firstProblemPath. '
         'See ${_launcherLogService.logHint(installationDir)}.',
@@ -508,15 +485,6 @@ class ClientSyncUseCase
     }
   }
 
-  /// Файлы, которые не будут удалены во время проверки файлов. Например, пользовательские
-  /// аддоны, скриншоты и т.д.
-  bool _isIgnored(String filePath) {
-    final normalizedPath = filePath.replaceAll('\\', '/').toLowerCase();
-    return Config.ignoredVerificationDirectories.any(
-      (pattern) => normalizedPath.contains(pattern.toLowerCase()),
-    );
-  }
-
   Future<void> _verifyDownloadedFile({
     required String installationDir,
     required ClientManifestFile file,