macOS: fix InstanceInfo device fields

apps/macos/Sources/Clawdis/InstancesStore.swift

@@ -160,6 +160,8 @@ final class InstancesStore {
             ip: ip,
             version: version,
             platform: platform,
+            deviceFamily: "Mac",
+            modelIdentifier: InstanceIdentity.modelIdentifier,
             lastInputSeconds: Self.lastInputSeconds(),
             mode: "local",
             reason: reason,
@@ -237,6 +239,8 @@ final class InstancesStore {
                 ip: nil,
                 version: nil,
                 platform: nil,
+                deviceFamily: nil,
+                modelIdentifier: nil,
                 lastInputSeconds: nil,
                 mode: "health",
                 reason: "health probe",

apps/macos/Tests/ClawdisIPCTests/SettingsViewSmokeTests.swift

@@ -104,6 +104,8 @@ struct SettingsViewSmokeTests {
                 ip: "127.0.0.1",
                 version: "1.0",
                 platform: "macos 15.0",
+                deviceFamily: "Mac",
+                modelIdentifier: "MacPreview",
                 lastInputSeconds: 12,
                 mode: "local",
                 reason: "test",