Button label changed from "ABORT MISSION" to "RETURN TO SAFE" (DIR-5 —
this is an assessed return-to-safe, not an emergency hard-stop). Lives in
the html field, not js.
FASTAPI_HOST (W3_FASTAPI_HOST in js) was found already set to
http://192.168.1.101:8081, the deployed rov_api backend on RPi5:8081 — no
change needed there, already correct.
Endpoint path (/abort), styling, layout, colours, and confirm/countdown
polling logic all unchanged. Pre-edit backup made per CREATE-THEN-BACKUP:
widgets/w3_abort_button.json.2026-07-14.bak (untracked, not part of this
commit).
