activa -Wextra -Wpedantic i neteja warnings

CMakeLists.txt

@@ -244,7 +244,7 @@ target_link_libraries(${PROJECT_NAME} PRIVATE SDL3::SDL3)
 
 # --- 4. CONFIGURACIÓN PLATAFORMAS Y COMPILADOR  ---
 # Configuración de flags de compilación
-target_compile_options(${PROJECT_NAME} PRIVATE -Wall)
+target_compile_options(${PROJECT_NAME} PRIVATE -Wall -Wextra -Wpedantic)
 target_compile_options(${PROJECT_NAME} PRIVATE $<$<CONFIG:RELEASE>:-Os -ffunction-sections -fdata-sections>)
 
 # Definir _DEBUG en modo Debug y RELEASE_BUILD en modo Release
@@ -390,7 +390,7 @@ if(NOT EMSCRIPTEN)
         source/core/resources/resource_pack.cpp
     )
     target_include_directories(pack_resources PRIVATE "${CMAKE_SOURCE_DIR}/source")
-    target_compile_options(pack_resources PRIVATE -Wall)
+    target_compile_options(pack_resources PRIVATE -Wall -Wextra -Wpedantic)
 
     # Regeneració automàtica de resources.pack en cada build si canvia data/.
     file(GLOB_RECURSE DATA_FILES CONFIGURE_DEPENDS "${CMAKE_SOURCE_DIR}/data/*")