Add game log file writing, debug modloader launch

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/api/launch/LaunchService.java

@@ -46,6 +46,8 @@ public class LaunchService {
                 return ApiResponse.error("Сборка не найдена: " + instanceName);
             }
 
+            JFXLauncher.initGameLog(instance.getPath());
+
             LaunchCommandBuilder builder = new LaunchCommandBuilder(instance);
             LaunchOptions options = new LaunchOptions();
             
@@ -55,6 +57,8 @@ public class LaunchService {
             options.setUuid(AuthManager.getUuid());
 
             List<String> command = builder.build(options);
+            System.out.println("[LAUNCH] Generated command for " + instanceName + ":");
+            command.forEach(arg -> System.out.println("  " + arg));
 
             ProcessBuilder processBuilder = new ProcessBuilder(command);
             processBuilder.directory(instance.getPath().toFile());

launcher/launcher/src/main/java/sashegdev/zernmc/launcher/ui/jfx/JFXLauncher.java

@@ -19,6 +19,9 @@ import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.nio.file.Path;
 import java.nio.file.Paths;
+import java.nio.file.StandardOpenOption;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
 import java.util.HashMap;
 import java.util.Map;
 import java.util.concurrent.Executors;
@@ -34,14 +37,33 @@ public class JFXLauncher extends Application {
     private HttpServer server;
     private StringBuilder logBuffer = new StringBuilder();
     private static StringBuilder gameLogBuffer = new StringBuilder();
+    private static Path gameLogFile;
     private Stage mainStage;
 
     public static void appendGameLog(String log) {
         synchronized (gameLogBuffer) {
             gameLogBuffer.append(log).append("\n");
+            
+            if (gameLogFile != null) {
+                try {
+                    String timestamp = LocalDateTime.now().format(DateTimeFormatter.ofPattern("HH:mm:ss"));
+                    Files.writeString(gameLogFile, "[" + timestamp + "] " + log + "\n", 
+                        StandardOpenOption.CREATE, StandardOpenOption.APPEND);
+                } catch (Exception ignored) {}
+            }
         }
     }
 
+    public static void initGameLog(Path instanceDir) {
+        try {
+            Path logsDir = instanceDir.resolve("logs");
+            Files.createDirectories(logsDir);
+            gameLogFile = logsDir.resolve("game.log");
+            Files.writeString(gameLogFile, "=== Game Log " + LocalDateTime.now() + " ===\n",
+                StandardOpenOption.CREATE, StandardOpenOption.TRUNCATE_EXISTING);
+        } catch (Exception ignored) {}
+    }
+
     public static String getGameLogs() {
         synchronized (gameLogBuffer) {
             return gameLogBuffer.toString();