feat(build): Add 'final' CMake target for production assembly

Introduces a 'final' target that automates the entire production pipeline: building the stripped binary, generating assets, and performing final compression (crunching).

- Updated CMakeLists.txt to define the 'final' target.

- Updated HOWTO.md with instructions for running 'cmake --build build --target final'.

2 files changed, 14 insertions, 2 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f752a63..e95c4dc 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -189,3 +189,11 @@ if(DEMO_BUILD_TOOLS)
     )
     target_include_directories(specview PRIVATE src)
 endif()
+
+# Final assembly target (strip and pack)
+add_custom_target(final
+    COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/scripts/crunch_demo.sh
+    DEPENDS demo64k
+    COMMENT "Performing final assembly (crunching)..."
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+)
diff --git a/HOWTO.md b/HOWTO.md
index 1f2560c..605fdff 100644
--- a/HOWTO.md
+++ b/HOWTO.md
@@ -42,12 +42,16 @@ In this mode, the demo will always start in fullscreen.
 
 ### Packed Build (Binary Crunching)
 
-To build the stripped binary and compress it using `UPX`, run the provided script:
+To build the stripped binary and compress it, run the `final` target:
 
 ```bash
+cmake --build build --target final
+```
+Alternatively, you can run the script directly:
+```bash
 ./scripts/crunch_demo.sh
 ```
-This requires `UPX` to be installed.
+This requires `gzexe` (macOS) or `UPX` (Linux/Windows) to be installed.
 
 ## Testing