fix: preserve Unicode characters in Pretty JSON formatting

src/modules/Elsa.Common/Services/JsonFormatter.cs

@@ -1,5 +1,7 @@
+using System.Text.Encodings.Web;
 using System.Text.Json;
 using System.Text.Json.Serialization;
+using System.Text.Unicode;
 
 namespace Elsa.Common.Services;
 
@@ -10,14 +12,17 @@ public class JsonFormatter : IFormatter
 
     public JsonFormatter()
     {
-        _options = new JsonSerializerOptions();
+        _options = new JsonSerializerOptions
+        {
+            Encoder = JavaScriptEncoder.Create(UnicodeRanges.All)
+        };
         _options.Converters.Add(new JsonStringEnumConverter());
     }
 
     /// <inheritdoc />
     public ValueTask<string> ToStringAsync(object value, CancellationToken cancellationToken = default)
     {
-        var json = JsonSerializer.Serialize(value);
+        var json = JsonSerializer.Serialize(value, _options);
         return ValueTask.FromResult(json);
     }
 

test/unit/Elsa.Common.UnitTests/JsonFormatterTests.cs

@@ -0,0 +1,20 @@
+using Elsa.Common.Services;
+
+namespace Elsa.Common.UnitTests;
+
+public class JsonFormatterTests
+{
+    [Fact]
+    public async Task ToStringAsync_DoesNotEscapeUnicodeCharacters()
+    {
+        var formatter = new JsonFormatter();
+        var value = new { Name = "ÆØÅ" };
+
+        var json = await formatter.ToStringAsync(value);
+
+        Assert.Contains("ÆØÅ", json);
+        Assert.DoesNotContain(@"\u00C6", json, StringComparison.OrdinalIgnoreCase);
+        Assert.DoesNotContain(@"\u00D8", json, StringComparison.OrdinalIgnoreCase);
+        Assert.DoesNotContain(@"\u00C5", json, StringComparison.OrdinalIgnoreCase);
+    }
+}