macOS: add leading device icons in Instances

apps/macos/Tests/ClawdisIPCTests/DeviceModelCatalogTests.swift

@@ -0,0 +1,34 @@
+import Testing
+@testable import Clawdis
+
+@Suite
+struct DeviceModelCatalogTests {
+    @Test
+    func symbolPrefersModelIdentifierPrefixes() {
+        #expect(DeviceModelCatalog.symbol(deviceFamily: "iPad", modelIdentifier: "iPad16,6", friendlyName: nil) == "ipad")
+        #expect(DeviceModelCatalog.symbol(deviceFamily: "iPhone", modelIdentifier: "iPhone17,3", friendlyName: nil) == "iphone")
+    }
+
+    @Test
+    func symbolUsesFriendlyNameForMacVariants() {
+        #expect(DeviceModelCatalog.symbol(
+            deviceFamily: "Mac",
+            modelIdentifier: "Mac99,1",
+            friendlyName: "Mac Studio (2025)") == "macstudio")
+        #expect(DeviceModelCatalog.symbol(
+            deviceFamily: "Mac",
+            modelIdentifier: "Mac99,2",
+            friendlyName: "Mac mini (2024)") == "macmini")
+        #expect(DeviceModelCatalog.symbol(
+            deviceFamily: "Mac",
+            modelIdentifier: "Mac99,3",
+            friendlyName: "MacBook Pro (14-inch, 2024)") == "laptopcomputer")
+    }
+
+    @Test
+    func symbolFallsBackToDeviceFamily() {
+        #expect(DeviceModelCatalog.symbol(deviceFamily: "Android", modelIdentifier: "", friendlyName: nil) == "logo.android")
+        #expect(DeviceModelCatalog.symbol(deviceFamily: "Linux", modelIdentifier: "", friendlyName: nil) == "cpu")
+    }
+}
+