Add macOS app icon build and bundle plist

Adds macOS-specific CMake packaging for app icons by compiling the Icon Composer `.icon` asset with `xcrun actool` into `MacOSIcon.icns` and `Assets.car`, then wiring those outputs into app bundles after build. Also introduces a dedicated `mac-Info.plist.in` template and sets bundle metadata/icon keys on macOS targets so the app uses the generated icon resources correctly.

CMakeLists.txt

@@ -102,6 +102,36 @@ if(OS_LINUX)
     FIND_LINUX_LIBRARIES("X11")
 endif()
 
+# Compile Icon Composer .icon into Assets.car + .icns for macOS app bundles.
+if(OS_MACOSX)
+    set(NEBULA_MAC_ICON_SOURCE "${CMAKE_SOURCE_DIR}/assets/images/branding/MacOSIcon.icon")
+    set(NEBULA_MAC_ICON_OUTDIR "${CMAKE_BINARY_DIR}/generated/MacOSIcon")
+    set(NEBULA_MAC_ICON_ICNS "${NEBULA_MAC_ICON_OUTDIR}/MacOSIcon.icns")
+    set(NEBULA_MAC_ICON_CAR "${NEBULA_MAC_ICON_OUTDIR}/Assets.car")
+    set(NEBULA_MAC_ICON_PARTIAL "${NEBULA_MAC_ICON_OUTDIR}/partial.plist")
+
+    add_custom_command(
+        OUTPUT "${NEBULA_MAC_ICON_ICNS}" "${NEBULA_MAC_ICON_CAR}"
+        COMMAND ${CMAKE_COMMAND} -E make_directory "${NEBULA_MAC_ICON_OUTDIR}"
+        COMMAND xcrun actool
+            "${NEBULA_MAC_ICON_SOURCE}"
+            --compile "${NEBULA_MAC_ICON_OUTDIR}"
+            --platform macosx
+            --minimum-deployment-target "${CMAKE_OSX_DEPLOYMENT_TARGET}"
+            --app-icon MacOSIcon
+            --output-partial-info-plist "${NEBULA_MAC_ICON_PARTIAL}"
+        DEPENDS
+            "${NEBULA_MAC_ICON_SOURCE}/icon.json"
+            "${NEBULA_MAC_ICON_SOURCE}/Assets/Nebula-Favicon.png"
+        COMMENT "Compiling MacOSIcon.icon for app bundle"
+        VERBATIM
+    )
+    add_custom_target(NebulaMacAppIcon DEPENDS
+        "${NEBULA_MAC_ICON_ICNS}"
+        "${NEBULA_MAC_ICON_CAR}"
+    )
+endif()
+
 function(add_nebula_app_target nebula_target entry_source)
     if(OS_WINDOWS)
         add_executable(${nebula_target} WIN32
@@ -180,6 +210,29 @@ function(add_nebula_app_target nebula_target entry_source)
         set(NEBULA_HELPER_OUTPUT_NAME "${nebula_target} Helper")
         string(TOLOWER "${nebula_target}" NEBULA_HELPER_BUNDLE_NAME)
 
+        set_target_properties(${nebula_target} PROPERTIES
+            MACOSX_BUNDLE_INFO_PLIST "${CMAKE_SOURCE_DIR}/cmake/mac-Info.plist.in"
+            MACOSX_BUNDLE_BUNDLE_NAME "${nebula_target}"
+            MACOSX_BUNDLE_GUI_IDENTIFIER "com.nebula.browser.${nebula_target}"
+            MACOSX_BUNDLE_BUNDLE_VERSION "1.0"
+            MACOSX_BUNDLE_SHORT_VERSION_STRING "1.0"
+            MACOSX_BUNDLE_LONG_VERSION_STRING "1.0"
+            MACOSX_BUNDLE_COPYRIGHT "Nebula Browser"
+        )
+        add_dependencies(${nebula_target} NebulaMacAppIcon)
+        add_custom_command(TARGET ${nebula_target} POST_BUILD
+            COMMAND ${CMAKE_COMMAND} -E make_directory
+                "${NEBULA_APP}/Contents/Resources"
+            COMMAND ${CMAKE_COMMAND} -E copy
+                "${NEBULA_MAC_ICON_ICNS}"
+                "${NEBULA_APP}/Contents/Resources/MacOSIcon.icns"
+            COMMAND ${CMAKE_COMMAND} -E copy
+                "${NEBULA_MAC_ICON_CAR}"
+                "${NEBULA_APP}/Contents/Resources/Assets.car"
+            COMMENT "Installing MacOSIcon into ${nebula_target}.app"
+            VERBATIM
+        )
+
         COPY_MAC_FRAMEWORK(
             "${nebula_target}"
             "${CEF_BINARY_DIR_RELEASE}"

cmake/mac-Info.plist.in

@@ -0,0 +1,42 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleDevelopmentRegion</key>
+	<string>en</string>
+	<key>CFBundleExecutable</key>
+	<string>${MACOSX_BUNDLE_EXECUTABLE_NAME}</string>
+	<key>CFBundleGetInfoString</key>
+	<string>${MACOSX_BUNDLE_INFO_STRING}</string>
+	<key>CFBundleIconFile</key>
+	<string>MacOSIcon</string>
+	<key>CFBundleIconName</key>
+	<string>MacOSIcon</string>
+	<key>CFBundleIdentifier</key>
+	<string>${MACOSX_BUNDLE_GUI_IDENTIFIER}</string>
+	<key>CFBundleInfoDictionaryVersion</key>
+	<string>6.0</string>
+	<key>CFBundleLongVersionString</key>
+	<string>${MACOSX_BUNDLE_LONG_VERSION_STRING}</string>
+	<key>CFBundleName</key>
+	<string>${MACOSX_BUNDLE_BUNDLE_NAME}</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>${MACOSX_BUNDLE_SHORT_VERSION_STRING}</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>CFBundleVersion</key>
+	<string>${MACOSX_BUNDLE_BUNDLE_VERSION}</string>
+	<key>CSResourcesFileMapped</key>
+	<true/>
+	<key>LSMinimumSystemVersion</key>
+	<string>12.0</string>
+	<key>NSHumanReadableCopyright</key>
+	<string>${MACOSX_BUNDLE_COPYRIGHT}</string>
+	<key>NSPrincipalClass</key>
+	<string>NSApplication</string>
+	<key>NSSupportsAutomaticGraphicsSwitching</key>
+	<true/>
+</dict>
+</plist>