fix 轨迹查询时区不传默认为+8

src/SJZY.Track.Application.Contract/Dtos/ProvideServices/GetTrackInput.cs

@@ -20,7 +20,13 @@ public class GetTrackInput
     /// 时区 +8 +8.25 -8.5 -9
     /// 不传默认+8
     /// </summary>
-    public float? TimeZone { get; set; } = 8;
+    private float? _timeZone;
+
+    public float? TimeZone
+    {
+        get => _timeZone ?? 8;
+        set => _timeZone = value;
+    }
 
     /// <summary>
     /// 排序方式

src/SJZY.Track.Application/Services/ProvideServices/TrackQueryService.cs

@@ -55,8 +55,8 @@ public class TrackQueryService : ApplicationService
                 Status = x.TrackStatus,
                 Content = x.TrackContent,
                 Location = x.TrackPlace,
-                Time = x.TrackTime.AddHours(input.TimeZone!.Value - x.TrackTimeZone),
+                Time = x.TrackTime.AddHours(input.TimeZone ?? 8 - x.TrackTimeZone),
-                TimeZone = input.TimeZone!.Value
+                TimeZone = input.TimeZone ?? 8
             }).ToList();
 
             res.Add(item);