fix: address PR #31 and #32 review findings

- Dockerfile: fix LLVM apt repo codename (jammy → noble) for ubuntu:24.04
- build-linux.sh: add missing mkdir -p /wowee-build-src before tar extraction
- Dockerfile: remove dead ENV OSXCROSS_VERSION=1.5 and its unset
- CMakeLists: scope -undefined dynamic_lookup to wowee target only
- GameServices: remove redundant game:: qualifier inside namespace game
- application.cpp: zero out gameServices_ after gameHandler reset in shutdown

CMakeLists.txt

@@ -338,7 +338,7 @@ endif()
 # macOS cross-compilation: the Vulkan loader (MoltenVK) is not available at link
 # time. Allow unresolved Vulkan symbols — they are resolved at runtime.
 if(CMAKE_CROSSCOMPILING AND CMAKE_SYSTEM_NAME STREQUAL "Darwin")
-    add_link_options("-undefined" "dynamic_lookup")
+    set(WOWEE_MACOS_CROSS_COMPILE TRUE)
 endif()
 # GL/GLEW kept temporarily for unconverted sub-renderers during Vulkan migration.
 # These files compile against GL types but their code is never called — the Vulkan
@@ -783,6 +783,11 @@ add_executable(wowee ${WOWEE_SOURCES} ${WOWEE_HEADERS} ${WOWEE_PLATFORM_SOURCES}
 if(TARGET opcodes-generate)
     add_dependencies(wowee opcodes-generate)
 endif()
+# macOS cross-compilation: MoltenVK is not available at link time.
+# Allow unresolved Vulkan symbols — resolved at runtime. Scoped to wowee only.
+if(WOWEE_MACOS_CROSS_COMPILE)
+    target_link_options(wowee PRIVATE "-undefined" "dynamic_lookup")
+endif()
 
 # FidelityFX-SDK headers can trigger compiler-specific pragma/unused-static noise
 # when included through the runtime bridge; keep suppression scoped to that TU.