[ui] Add semantic primitive ownership Build a layered Zenbu token and sizing system, make authored controls use native-underneath primitives, migrate mrjunejune without imposing visual surfaces, and document/enforce HTML ownership in the catalog and wiki. Co-authored-by: Copilot <[email protected]>

@ECHO OFF

set ROOT_DIR=%EXT_BUILD_ROOT%
if "%ROOT_DIR%"=="" set ROOT_DIR=%CD%
set EMSCRIPTEN=%ROOT_DIR%\%EM_BIN_PATH%\emscripten
set EM_CONFIG=%ROOT_DIR%\%EM_CONFIG_PATH%