ui : embed assets directly with CMake (#28445)

Remove the build-time C++ helper and external gzip dependency,
simplifying cross-compilation. Keep the generated C++ in templates for
readability and preserve fully embedded UI assets.

Signed-off-by: Adrien Gallouët <angt@huggingface.co>

tools/server/CMakeLists.txt

@@ -50,6 +50,8 @@ target_include_directories(${TARGET} PUBLIC ${CMAKE_CURRENT_SOURCE_DIR})
 target_include_directories(${TARGET} PRIVATE ../mtmd ${CMAKE_SOURCE_DIR})
 target_link_libraries(${TARGET} PUBLIC server-context llama-ui cpp-httplib ${CMAKE_THREAD_LIBS_INIT})
 
+add_dependencies(${TARGET} llama-ui-assets)
+
 if(LLAMA_TOOLS_INSTALL)
     install(TARGETS ${TARGET} LIBRARY)
 endif()