fix(uns): omit blank optional keys from TagConfig + add omission tests; drop unused ParseInt (T4-T8 review)

tests/Server/ZB.MOM.WW.OtOpcUa.AdminUI.Tests/Uns/AbCipTagConfigModelTests.cs

@@ -79,4 +79,24 @@ public sealed class AbCipTagConfigModelTests
     {
         new AbCipTagConfigModel { TagPath = "Motor1.Status" }.Validate().ShouldBeNull();
     }
+
+    [Fact]
+    public void ToJson_omits_blank_deviceHostAddress()
+    {
+        var m = new AbCipTagConfigModel { TagPath = "Motor1.Status", DeviceHostAddress = "" };
+
+        var json = m.ToJson();
+
+        json.ShouldNotContain("deviceHostAddress");
+    }
+
+    [Fact]
+    public void ToJson_includes_deviceHostAddress_when_set()
+    {
+        var m = new AbCipTagConfigModel { TagPath = "Motor1.Status", DeviceHostAddress = "ab://host" };
+
+        var json = m.ToJson();
+
+        json.ShouldContain("\"deviceHostAddress\":\"ab://host\"");
+    }
 }

tests/Server/ZB.MOM.WW.OtOpcUa.AdminUI.Tests/Uns/AbLegacyTagConfigModelTests.cs

@@ -79,4 +79,24 @@ public sealed class AbLegacyTagConfigModelTests
     {
         new AbLegacyTagConfigModel { Address = "N7:0" }.Validate().ShouldBeNull();
     }
+
+    [Fact]
+    public void ToJson_omits_blank_deviceHostAddress()
+    {
+        var m = new AbLegacyTagConfigModel { Address = "N7:0", DeviceHostAddress = "" };
+
+        var json = m.ToJson();
+
+        json.ShouldNotContain("deviceHostAddress");
+    }
+
+    [Fact]
+    public void ToJson_includes_deviceHostAddress_when_set()
+    {
+        var m = new AbLegacyTagConfigModel { Address = "N7:0", DeviceHostAddress = "ab://host" };
+
+        var json = m.ToJson();
+
+        json.ShouldContain("\"deviceHostAddress\":\"ab://host\"");
+    }
 }

tests/Server/ZB.MOM.WW.OtOpcUa.AdminUI.Tests/Uns/FocasTagConfigModelTests.cs

@@ -79,4 +79,24 @@ public sealed class FocasTagConfigModelTests
     {
         new FocasTagConfigModel { Address = "R100" }.Validate().ShouldBeNull();
     }
+
+    [Fact]
+    public void ToJson_omits_blank_deviceHostAddress()
+    {
+        var m = new FocasTagConfigModel { Address = "R100", DeviceHostAddress = "" };
+
+        var json = m.ToJson();
+
+        json.ShouldNotContain("deviceHostAddress");
+    }
+
+    [Fact]
+    public void ToJson_includes_deviceHostAddress_when_set()
+    {
+        var m = new FocasTagConfigModel { Address = "R100", DeviceHostAddress = "ab://host" };
+
+        var json = m.ToJson();
+
+        json.ShouldContain("\"deviceHostAddress\":\"ab://host\"");
+    }
 }

tests/Server/ZB.MOM.WW.OtOpcUa.AdminUI.Tests/Uns/TagConfigJsonTests.cs

@@ -129,6 +129,7 @@ public sealed class TagConfigJsonTests
 
         TagConfigJson.Set(obj, "region", null);
 
-        TagConfigJson.GetString(obj, "region").ShouldBeNull();
+        obj.ContainsKey("region").ShouldBeFalse();
+        TagConfigJson.Serialize(obj).ShouldNotContain("region");
     }
 }

tests/Server/ZB.MOM.WW.OtOpcUa.AdminUI.Tests/Uns/TwinCATTagConfigModelTests.cs

@@ -79,4 +79,24 @@ public sealed class TwinCATTagConfigModelTests
     {
         new TwinCATTagConfigModel { SymbolPath = "MAIN.bStart" }.Validate().ShouldBeNull();
     }
+
+    [Fact]
+    public void ToJson_omits_blank_deviceHostAddress()
+    {
+        var m = new TwinCATTagConfigModel { SymbolPath = "MAIN.bStart", DeviceHostAddress = "" };
+
+        var json = m.ToJson();
+
+        json.ShouldNotContain("deviceHostAddress");
+    }
+
+    [Fact]
+    public void ToJson_includes_deviceHostAddress_when_set()
+    {
+        var m = new TwinCATTagConfigModel { SymbolPath = "MAIN.bStart", DeviceHostAddress = "ab://host" };
+
+        var json = m.ToJson();
+
+        json.ShouldContain("\"deviceHostAddress\":\"ab://host\"");
+    }
 }