Ещё фиксы от ИИ

src/LiquidCode.Tester.Worker/Services/KotlinExecutionServiceIsolate.cs

@@ -52,8 +52,15 @@ public class KotlinExecutionServiceIsolate : IExecutionService
 
             File.Copy(executablePath, boxJarPath, overwrite: true);
 
-            // Prepare output file in box
+            // Prepare input/output files inside the sandbox
             var outputFilePath = Path.Combine(boxDir, "output.txt");
+            string? sandboxInputPath = null;
+
+            if (!string.IsNullOrEmpty(inputFilePath) && File.Exists(inputFilePath))
+            {
+                sandboxInputPath = Path.Combine(boxDir, "input.txt");
+                File.Copy(inputFilePath, sandboxInputPath, overwrite: true);
+            }
 
             // Run in Isolate (Kotlin runs via Java)
             var kotlinMemoryMb = Math.Max(memoryLimitMb, 128); // Minimum 128MB for JVM
@@ -69,7 +76,7 @@ public class KotlinExecutionServiceIsolate : IExecutionService
                 StackLimitKb = 256 * 1024,
                 ProcessLimit = 64, // JVM creates multiple threads
                 EnableNetwork = false,
-                StdinFile = inputFilePath,
+                StdinFile = sandboxInputPath,
                 StdoutFile = outputFilePath,
                 WorkingDirectory = "/box"
             });