Add test for MEDIA_STATUS with German umlaut title

Added a new test method `TestMediaStatusWithGermanUmlautTitle` to validate the parsing of a `MEDIA_STATUS` message containing German umlaut characters. This includes new using directives for necessary namespaces and assertions to ensure correct deserialization and property verification of the media object and its title.

Author: Tapanila

Sharpcaster.Test/JsonTester.cs

@@ -2,6 +2,9 @@
 using Sharpcaster.Extensions;
 using Sharpcaster.Interfaces;
 using Sharpcaster.Messages.Connection;
+using Sharpcaster.Messages.Media;
+using Sharpcaster.Models.Media;
+using System.Linq;
 using System.Text.Json;
 using Xunit;
 using Sharpcaster.Test.helper;
@@ -19,5 +22,88 @@ public void TestConnectMessage()
             var output = JsonSerializer.Serialize(connectMessage, SharpcasteSerializationContext.Default.ConnectMessage);
             Assert.Equal("{\"requestId\":" + requestId +  ",\"type\":\"CONNECT\"}", output);
         }
+
+        [Fact]
+        public void TestMediaStatusWithGermanUmlautTitle()
+        {
+            // Test parsing a MEDIA_STATUS message with German umlaut characters in the title
+            var mediaStatusJson = """
+            {
+                "type": "MEDIA_STATUS",
+                "status": [{
+                    "mediaSessionId": 1,
+                    "playbackRate": 1,
+                    "playerState": "PLAYING",
+                    "currentTime": 80288.353693,
+                    "supportedMediaCommands": 274447,
+                    "volume": {"level": 1, "muted": false},
+                    "activeTrackIds": [],
+                    "media": {
+                        "contentId": "https://orf-live.ors-shoutcast.at/oe1-q1a",
+                        "streamType": 1,
+                        "contentType": "audio/mp4",
+                        "metadata": {
+                            "metadataType": 0,
+                            "title": "Ö1-(128bps)"
+                        },
+                        "duration": null,
+                        "mediaCategory": "AUDIO",
+                        "tracks": [],
+                        "breakClips": [],
+                        "breaks": []
+                    },
+                    "currentItemId": 1,
+                    "items": [{
+                        "itemId": 1,
+                        "media": {
+                            "contentId": "https://orf-live.ors-shoutcast.at/oe1-q1a",
+                            "streamType": 1,
+                            "contentType": "audio/mp4",
+                            "metadata": {
+                                "metadataType": 0,
+                                "title": "Ö1-(128bps)"
+                            },
+                            "duration": null,
+                            "mediaCategory": "AUDIO"
+                        },
+                        "autoplay": true,
+                        "orderId": 0
+                    }],
+                    "repeatMode": "REPEAT_OFF"
+                }],
+                "requestId": 1345463442
+            }
+            """;
+
+            // Parse the JSON message
+            MediaStatusMessage mediaStatusMessage = JsonSerializer.Deserialize(mediaStatusJson, SharpcasteSerializationContext.Default.MediaStatusMessage);
+
+            // Verify the message was parsed correctly
+            Assert.NotNull(mediaStatusMessage);
+            Assert.NotNull(mediaStatusMessage.Status);
+            Assert.Single(mediaStatusMessage.Status);
+
+            var status = mediaStatusMessage.Status.First();
+            Assert.Equal(1, status.MediaSessionId);
+            Assert.Equal(PlayerStateType.Playing, status.PlayerState);
+
+            // Verify the German umlaut title is preserved correctly
+            Assert.NotNull(status.Media);
+            Assert.NotNull(status.Media.Metadata);
+            Assert.Equal("Ö1-(128bps)", status.Media.Metadata.Title);
+
+            // Verify queue item also has correct title
+            Assert.NotNull(status.Items);
+            Assert.Single(status.Items);
+            Assert.NotNull(status.Items[0].Media);
+            Assert.NotNull(status.Items[0].Media.Metadata);
+            Assert.Equal("Ö1-(128bps)", status.Items[0].Media.Metadata.Title);
+
+            // Verify live stream properties
+            Assert.Equal("https://orf-live.ors-shoutcast.at/oe1-q1a", status.Media.ContentId);
+            Assert.Equal(StreamType.Live, status.Media.StreamType);
+            Assert.Equal("audio/mp4", status.Media.ContentType);
+            Assert.Null(status.Media.Duration);
+        }
     }
 }