apps/files, apps/sheets, libs/wm_api, libs/wm_theme and the renamed env vars and script
namespaces meet the demo seams; added demo files move to the renamed paths; the files app
keeps its own makepad_home so demo builds without the chat feature do not link the AI hub.
Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01WV6BzHQiJEvvK9EPc1d4ks