run_turn takes answer_tools: false ends the turn once the tools have
answered. The assistant node uses it and says what was set ("Kitchen light
off, living room light off."), which saves one model round, about 1.1 s on
the P100. A turn without a call still streams the model's own words.
rebuild-frontend keeps the running stack's FRONTEND_HOST, so the token
issuer no longer flips between the LAN address and app.localhost.
Melvin Strobl
1a8f6875c4