refactor(assets): Optimize asset retrieval using array lookup

This refactors the asset management system to be more efficient and cleaner.

- Moved common GetAsset/DropAsset logic to src/util/asset_manager.cc.

- Changed retrieval to use an array of records (AssetRecord) for O(1) lookups instead of a switch statement.

- Updated asset_packer to generate only raw data and the record array.

1 files changed, 2 insertions, 0 deletions

diff --git a/CMakeLists.txt b/CMakeLists.txt
index d460131..f752a63 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -93,6 +93,7 @@ add_executable(demo64k
     src/audio/idct.cc
     src/audio/window.cc
     src/audio/synth.cc
+    src/util/asset_manager.cc
     third_party/glfw3webgpu/glfw3webgpu.c
     ${GENERATED_ASSETS_DATA_CC}
 )
@@ -155,6 +156,7 @@ if(DEMO_BUILD_TESTS)
 
     add_executable(test_assets
         src/tests/test_assets.cc
+        src/util/asset_manager.cc
         ${GENERATED_ASSETS_DATA_CC}
     )
     target_include_directories(test_assets PRIVATE ${CMAKE_CURRENT_BINARY_DIR}/src src)