Conceptual change: duration_minutes = actual sleep time (not time in bed)
Backend:
- Plausibility check: deep + rem + light = duration (awake separate)
- Import: duration = deep + rem + light (without awake)
- Updated error message: clarifies awake not counted
Frontend:
- Label: "Schlafdauer (reine Schlafzeit, Minuten)"
- Auto-calculate: bedtime-waketime minus awake_minutes
- Plausibility check: only validates sleep phases (not awake)
- Both NewEntry and Edit mode updated
Rationale:
- Standard in sleep tracking (Apple Health shows "Sleep", not "Time in Bed")
- Clearer semantics: duration = how long you slept
- awake_minutes tracked separately for analysis
- More intuitive for users
Example:
- Time in bed: 22:00 - 06:00 = 480 min (8h)
- Awake phases: 30 min
- Sleep duration: 450 min (7h 30min) ✓
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>