DEVLOG #18

Since the LD2450 first worked, I connected TX, RX1–RX4, and Wi-Fi, positioned
the sensor, sealed setup-v2, and added a calibration preparation phase with a
countdown and a minimum duration of 60 seconds.

The real hardware UI is running on port 8080; port 3002 still shows the
simulation. I started the workflow, but it currently stops at step 4, the
empty-room Wi-Fi baseline, because radar packets are being lost.

I improved server-side packet sorting and built a new 10 Hz firmware. The OTA
update started, but the device still boots the old firmware from ota_0 at
about 20.6 Hz.

The sensor is online, but calibration is not ready. 63 UI tests pass; one
Rust test mismatch remains. No real D6 calibration or blind validation has
been completed yet.

Next: activate the 10 Hz firmware, resolve the packet-loss blocker, and rerun
the preflight and empty-room baseline.