3D twin had no marker for placed climate sensors — the Zigbee/Tuya hygrometers behind the airflow deltas were invisible in the scene

Open item from the 2026-09-14 zone-placement pass (FOLLOWUPS). FIXED 2026-09-14 (PR #274, merged 24c0f79, deployed 21:46 as bundle index-udHOKIJ8.js): placedSensorsFromClimate() turns fleet.system.climate_by_zone into one marker per fitted sensor with that sensor’s own reading (older brains without a sensors list get one averaged marker; stubs read NO DATA; held readings amber). PlacedSensors.tsx places each at the spot its placement names (beside the canopy hanger, fan_intake / fan_exhaust / duct_passive anchors, tent floor/ceiling, dome tray, outside the room shell for indoors/outdoors; left/right/front/back spread across the tent). Hover names the sensor; click opens sensor.dsc_climate___temperature. VERIFIED LIVE on the deployed bundle at #/twin: three markers (4×8 canopy, 4×8 exhaust->room, 2×4 canopy) reading what the Placed climate card shows. Note: the first deploy attempt (launched via Bash) shipped a stale tarball and restarted the brain for nothing; the retry via the PowerShell tool landed it, and that second restart within 5 min tripped the stale-hub Sonoff failsafe 4x (relays followed demand again within a minute).