Counter wrap stays on the step grid: it counts in span = top - lo + the finest step rather than the period, so one counter of step 5 up to 100 wraps 100 + 5 to 0 and 0 - 5 to 100; the time picker is unchanged. Check cases and docs formula

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_016ezWcLmBCtTVKFPxfdK2MK

docs/interface/dashboards.md

@@ -154,7 +154,7 @@ which the firmware ports as it stands):
 | Digit dᵢ | d₀ = ⌊v / w₀⌋; dᵢ = ⌊v / wᵢ⌋ mod sizeᵢ, a remainder that is never negative |
 | A step | counter i by k steps (k < 0 down): v + k × stepᵢ × wᵢ, so carry and borrow follow |
 | Range | lo = min₀ × w₀. With a `max`, period = (max₀ − min₀ + 1) × w₀ and top = lo + ⌊(period − 1) / s⌋ × s, s the finest counter's step: 0–23 in 5-minute steps tops out at 1435 (23:55), one counter of step 5 up to 100 at 100 |
-| Wrap | v = lo + ((v − lo) mod period): 23:55 + 5 min is 00:00, 00:00 − 1 h is 23:00 |
+| Wrap | v = lo + ((v − lo) mod span), span = top − lo + s, so a wrap stays on the step grid; where s divides the period the span is the period. 23:55 + 5 min is 00:00, 00:00 − 1 h is 23:00; one counter of step 5 up to 100 goes from 100 + 5 to 0 and from 0 − 5 to 100 |
 | Stop | v held to lo … top, as a slider is |
 | No `max` | no top and nothing to wrap at: v is only held to lo or above |