Use Icon Composer icon with Liquid Glass support

Replace the programmatic AppIconFactory with a proper .icon file
created in Icon Composer. The release workflow now compiles it via
actool, producing both Assets.car (macOS 26 Liquid Glass) and
AppIcon.icns (backwards compat).

Author: marckohlbrugge

.github/workflows/release.yml

@@ -81,6 +81,20 @@ jobs:
           cp "$EXECUTABLE" "$APP_BUNDLE/Contents/MacOS/Reading List"
           cp Info.plist "$APP_BUNDLE/Contents/Info.plist"
 
+          # Compile .icon into Assets.car + AppIcon.icns
+          xcrun actool \
+            Resources/AppIcon.icon --app-icon AppIcon \
+            --compile "$APP_BUNDLE/Contents/Resources" \
+            --output-format human-readable-text \
+            --notices --warnings --errors \
+            --output-partial-info-plist /dev/null \
+            --include-all-app-icons \
+            --enable-on-demand-resources NO \
+            --development-region en \
+            --target-device mac \
+            --minimum-deployment-target 26.0 \
+            --platform macosx
+
           # Set version in Info.plist
           /usr/libexec/PlistBuddy -c "Set :CFBundleShortVersionString $VERSION" "$APP_BUNDLE/Contents/Info.plist"
           /usr/libexec/PlistBuddy -c "Set :CFBundleVersion $(date +%Y%m%d%H%M%S)" "$APP_BUNDLE/Contents/Info.plist"

Info.plist

@@ -18,6 +18,10 @@
 	<string>1.0</string>
 	<key>LSMinimumSystemVersion</key>
 	<string>13.0</string>
+	<key>CFBundleIconFile</key>
+	<string>AppIcon</string>
+	<key>CFBundleIconName</key>
+	<string>AppIcon</string>
 	<key>NSHighResolutionCapable</key>
 	<true/>
 	<key>NSPrincipalClass</key>

Resources/AppIcon.icon/Assets/eyeglasses.png

@@ -0,0 +1,52 @@
+{
+  "fill" : {
+    "automatic-gradient" : "extended-gray:1.00000,1.00000"
+  },
+  "groups" : [
+    {
+      "layers" : [
+        {
+          "fill-specializations" : [
+            {
+              "appearance" : "dark",
+              "value" : {
+                "solid" : "extended-gray:1.00000,1.00000"
+              }
+            },
+            {
+              "appearance" : "tinted",
+              "value" : {
+                "solid" : "extended-gray:1.00000,1.00000"
+              }
+            }
+          ],
+          "glass" : true,
+          "hidden" : false,
+          "image-name" : "eyeglasses.png",
+          "name" : "eyeglasses",
+          "position" : {
+            "scale" : 0.5,
+            "translation-in-points" : [
+              0,
+              0
+            ]
+          }
+        }
+      ],
+      "shadow" : {
+        "kind" : "neutral",
+        "opacity" : 0.5
+      },
+      "translucency" : {
+        "enabled" : true,
+        "value" : 0.5
+      }
+    }
+  ],
+  "supported-platforms" : {
+    "circles" : [
+      "watchOS"
+    ],
+    "squares" : "shared"
+  }
+}

Resources/AppIcon.icon/icon.json

@@ -115,8 +115,6 @@ final class AppDelegate: NSObject, NSApplicationDelegate {
     func applicationDidFinishLaunching(_: Notification) {
         NSApp.setActivationPolicy(.regular)
         NSApp.activate(ignoringOtherApps: true)
-        NSApp.applicationIconImage = AppIconFactory.makeAppIcon()
-
         // Ensure the first app window becomes key when launched from terminal.
         DispatchQueue.main.async {
             if let window = NSApp.windows.first {