Add native installer packaging to CI for all platforms

Linux: DEB with /opt/wowee prefix and /usr/local/bin/wowee wrapper script
Windows x86-64: NSIS installer with DLL bundling and Start Menu shortcut
Windows ARM64: ZIP archive with bundled DLLs
macOS ARM64: .app bundle via dylibbundler + DMG via hdiutil

Assets are bundled into all packages (Original Music excluded). StormLib
is installed where available so asset_extract is included in packages.

CMakeLists.txt

@@ -389,6 +389,29 @@ install(TARGETS wowee
     ARCHIVE DESTINATION lib
 )
 
+# Install tools alongside main binary
+foreach(_tool dbc_to_csv blp_convert auth_probe auth_login_probe)
+    if(TARGET ${_tool})
+        install(TARGETS ${_tool} RUNTIME DESTINATION bin)
+    endif()
+endforeach()
+if(STORMLIB_LIBRARY AND STORMLIB_INCLUDE_DIR)
+    install(TARGETS asset_extract RUNTIME DESTINATION bin)
+endif()
+
+# Install built-in assets (exclude proprietary music)
+install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/assets
+    DESTINATION bin
+    PATTERN "Original Music" EXCLUDE)
+
+# On Windows, install any DLLs that were bundled into the build output dir
+# (populated by the CI workflow's DLL-bundling step before cpack runs)
+if(WIN32)
+    install(DIRECTORY "${CMAKE_BINARY_DIR}/bin/"
+        DESTINATION bin
+        FILES_MATCHING PATTERN "*.dll")
+endif()
+
 # Linux desktop integration (launcher + icon)
 if(UNIX AND NOT APPLE)
     set(WOWEE_LINUX_ICON_PATH "${CMAKE_INSTALL_FULL_DATAROOTDIR}/icons/hicolor/256x256/apps/wowee.png")
@@ -512,3 +535,66 @@ message(STATUS "  SDL2: ${SDL2_VERSION}")
 message(STATUS "  OpenSSL: ${OPENSSL_VERSION}")
 message(STATUS "  ImGui: ${IMGUI_DIR}")
 message(STATUS "")
+
+# ---- CPack packaging ----
+set(CPACK_PACKAGE_NAME "wowee")
+set(CPACK_PACKAGE_VERSION "${PROJECT_VERSION}")
+set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "World of Warcraft client emulator")
+set(CPACK_PACKAGE_VENDOR "Wowee")
+set(CPACK_PACKAGE_INSTALL_DIRECTORY "Wowee")
+set(CPACK_RESOURCE_FILE_LICENSE "${CMAKE_CURRENT_SOURCE_DIR}/LICENSE")
+
+if(WIN32)
+    set(CPACK_GENERATOR "NSIS")
+    set(CPACK_NSIS_DISPLAY_NAME "Wowee")
+    set(CPACK_NSIS_PACKAGE_NAME "Wowee")
+    set(CPACK_NSIS_INSTALL_ROOT "$PROGRAMFILES64")
+    set(CPACK_NSIS_ENABLE_UNINSTALL_BEFORE_INSTALL ON)
+    # Run wowee from bin/ so that ./assets/ resolves correctly.
+    # SetOutPath sets the shortcut's working directory in NSIS.
+    set(CPACK_NSIS_CREATE_ICONS_EXTRA
+        "SetOutPath '$INSTDIR\\bin'\nCreateShortCut '$SMPROGRAMS\\$STARTMENU_FOLDER\\Wowee.lnk' '$INSTDIR\\bin\\wowee.exe'")
+    set(CPACK_NSIS_DELETE_ICONS_EXTRA
+        "Delete '$SMPROGRAMS\\$STARTMENU_FOLDER\\Wowee.lnk'")
+elseif(APPLE)
+    set(CPACK_GENERATOR "DragNDrop")
+else()
+    # Linux — generate postinst/prerm wrapper scripts
+    file(MAKE_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/packaging)
+    # postinst: write a wrapper script at /usr/local/bin/wowee that cd's to
+    # the install dir so ./assets/ resolves correctly.
+    file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/packaging/postinst
+[[#!/bin/sh
+cat > /usr/local/bin/wowee << 'WOWEE_WRAPPER'
+#!/bin/sh
+cd /opt/wowee/bin
+exec ./wowee "$@"
+WOWEE_WRAPPER
+chmod +x /usr/local/bin/wowee
+]])
+    file(WRITE ${CMAKE_CURRENT_BINARY_DIR}/packaging/prerm
+"#!/bin/sh\nrm -f /usr/local/bin/wowee\n")
+    file(CHMOD
+        ${CMAKE_CURRENT_BINARY_DIR}/packaging/postinst
+        ${CMAKE_CURRENT_BINARY_DIR}/packaging/prerm
+        PERMISSIONS
+            OWNER_EXECUTE OWNER_WRITE OWNER_READ
+            GROUP_EXECUTE GROUP_READ
+            WORLD_EXECUTE WORLD_READ)
+
+    set(CPACK_GENERATOR "DEB")
+    set(CPACK_PACKAGING_INSTALL_PREFIX "/opt/wowee")
+    set(CPACK_DEBIAN_PACKAGE_MAINTAINER "Wowee")
+    set(CPACK_DEBIAN_PACKAGE_SECTION "games")
+    set(CPACK_DEBIAN_PACKAGE_DEPENDS
+        "libsdl2-2.0-0, libglew2.2 | libglew2.1, libssl3, zlib1g")
+    set(CPACK_DEBIAN_PACKAGE_CONTROL_EXTRA
+        "${CMAKE_CURRENT_BINARY_DIR}/packaging/postinst;${CMAKE_CURRENT_BINARY_DIR}/packaging/prerm")
+    if(CMAKE_SYSTEM_PROCESSOR MATCHES "x86_64|AMD64")
+        set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE "amd64")
+    elseif(CMAKE_SYSTEM_PROCESSOR MATCHES "aarch64|ARM64")
+        set(CPACK_DEBIAN_PACKAGE_ARCHITECTURE "arm64")
+    endif()
+endif()
+
+include(CPack)