- space dialog 'Display' section: room borders/names toggles, color+opacity,
fill by zigbee signal or lights (tri-state: on/off/no-lights)
- draggable room name labels persisted as layout rl_<roomId>
- 'no image, outline by hand' space source with canvas orientation; image
optional now; switching an existing space to draw detaches its plan
- demo/ synthetic-home harness lives in the repo (serve.mjs + smokes + icons gen)
- docs/TESTING.md checklist (same-commit update policy); self-run found and
fixed: plan_url not detached on image->draw, _stateClass crash on states
without entity_id; perf measured (162 devices ~14ms build)
- backend: SPACE_DISPLAY_SCHEMA validation (+test)
