Merge b647-focas-alarms: FOCAS native alarms reach Part 9 conditions (ALARM: address) + respawn keeps acks host-side (#647)

Claude-Session: https://claude.ai/code/session_01Ef2ozxS7QPanGT8uoATbTe

tests/Server/ZB.MOM.WW.OtOpcUa.AdminUI.Tests/Pickers/FocasAddressBuilderTests.cs

@@ -63,4 +63,37 @@ public sealed class FocasAddressBuilderTests
             }
         }
     }
+
+    // ---- Gitea #647: ALARM: selectors ----
+
+    [Theory]
+    [InlineData("*", null, null, "ALARM:*")]
+    [InlineData("*", 401, null, "ALARM:*")]               // numbers apply to a type scope only
+    [InlineData("OTHER", null, null, "ALARM:OTHER")]
+    [InlineData("Servo", null, null, "ALARM:Servo")]
+    [InlineData("Servo", 401, null, "ALARM:Servo/401")]
+    [InlineData("Servo", 401, 453, "ALARM:Servo/401-453")]
+    [InlineData("Servo", 401, 401, "ALARM:Servo/401")]
+    [InlineData("T9", 750, 758, "ALARM:T9/750-758")]
+    public void BuildAlarm_produces_a_selector_the_driver_can_parse(string scope, int? lo, int? hi, string expected)
+    {
+        var built = FocasAddressBuilder.BuildAlarm(scope, lo, hi);
+
+        built.ShouldBe(expected);
+        FocasAddress.TryParse(built)!.Kind.ShouldBe(FocasAreaKind.Alarm);
+    }
+
+    [Theory]
+    [InlineData("Servo", 453, 401)]   // reversed range
+    [InlineData("Bogus", null, null)] // not a type
+    [InlineData("", null, null)]
+    public void BuildAlarm_returns_empty_rather_than_an_unusable_selector(string scope, int? lo, int? hi)
+        => FocasAddressBuilder.BuildAlarm(scope, lo, hi).ShouldBeEmpty();
+
+    [Fact]
+    public void Every_offered_alarm_scope_composes_a_parseable_selector()
+    {
+        foreach (var scope in FocasAddressBuilder.AlarmScopes)
+            FocasAddress.TryParse(FocasAddressBuilder.BuildAlarm(scope, 1, 2)).ShouldNotBeNull(scope);
+    }
 }

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

@@ -80,6 +80,10 @@ public sealed class FocasTagConfigModelTests
     [InlineData("PARAM:1815/0")]
     [InlineData("MACRO:500")]
     [InlineData("FIXED:Identity/SeriesNumber")]
+    [InlineData("ALARM:*")]
+    [InlineData("ALARM:OTHER")]
+    [InlineData("ALARM:Servo/401-453")]
+    [InlineData("ALARM:T9")]
     public void Validate_returns_null_for_every_address_form_the_driver_accepts(string address)
         => new FocasTagConfigModel { Address = address }.Validate().ShouldBeNull();
 
@@ -104,6 +108,25 @@ public sealed class FocasTagConfigModelTests
         // The operator has to be able to act on it, so the message names the legal forms.
         error.ShouldContain("PARAM:");
         error.ShouldContain("FIXED:");
+        error.ShouldContain("ALARM:");
+    }
+
+    /// <summary>
+    ///     Gitea #647 — a malformed ALARM: selector gets the selector's own reason, the same text the deploy-time
+    ///     inspector gives for the same string (one authority: <c>FocasAddress.DescribeAlarmAddressError</c>).
+    /// </summary>
+    [Theory]
+    [InlineData("ALARM:Servo/10-5")]
+    [InlineData("ALARM:Bogus")]
+    [InlineData("ALARM:")]
+    public void Validate_rejects_a_malformed_alarm_selector_with_the_gate_s_reason(string address)
+    {
+        var error = new FocasTagConfigModel { Address = address }.Validate();
+
+        error.ShouldNotBeNull();
+        error.ShouldContain(FocasAddress.DescribeAlarmAddressError(address)!);
+        FocasTagDefinitionFactory.Inspect("{\"address\":\"" + address + "\",\"alarm\":{}}")
+            .ShouldContain(w => w.Contains(FocasAddress.DescribeAlarmAddressError(address)!));
     }
 
     [Fact]