- signal is now a loud TTS 'hydrate now' on the ALARM stream (TTS warmed at
session start), so it is unmistakably BalDav and audible when the phone is not
in view (walking/VR); the old ringtone was indistinguishable from a system alarm.
- sweat need scales by activity instead of a flat 600 ml/h: bike 600, walk 200,
run 450, workout/vr 250 ml/h. Walking no longer nags every 15 min.
- deficit split into baseDeficit (seeded from the food log) + accrued sweat;
logging a drink mid-session recomputes the base and re-seeds via seedSeq, so it
silences the reminder. seedSeq=0 (profile save / init) never zeroes it mid-ride.
- persistent 'БалДав: попей воды (HH:MM)' notification left as a record.