(а) title: null gets the same compact frame as title: '' — YAML 'title:'
with no value parses as null, the owner's decision makes them synonyms.
(б) the guides state that room labels are inert in the Background editor.
(г) furniture strokes skip the flat-camera compensation in the labs iso
projection, tracking ordinary decor there.
(д) TESTING.md notes the light_pools opt-in for static room cards.
(е) the space-card dispose gate mirrors the strict === true render gate.
User-Visible: yes
Issue: #376
Sergey Matyunin