Draw each timing row as a range chart

A pair of numbers per type says how long the gaps are but not where the puppy
currently sits between them, which is the thing you actually want when
deciding whether to go out now. Each row becomes a small chart instead: a band
from the shortest to the typical gap, a marker for time since the last one,
and a scale of [min(shortest, since), max(typical, since)] so the marker is
free to land inside the band, off its left end (just went) or off its right
end (due).

Three cases the layout has to survive. A gap in tracking can leave "since" at
days against a typical gap of hours, so past twice the typical the marker
parks at the right edge behind a chevron and its label keeps the real number —
squashing the band to a sliver would be worse, and clamping silently would
read as being in range. A band too narrow to hang a label off each end carries
both values centred over its middle rather than pinned to the track ends,
where they would imply a spread the band does not have. Under two events there
is no gap at all, so the row falls back to a sentence instead of an axis with
nothing on it.

The marker is ink over a surface-coloured ring so it stays legible on any band
colour in either theme, and the gap between a label's word and its value is an
explicit dx: a trailing space inside a tspan does not survive XML whitespace
normalisation.

src/changelog.json

@@ -1,4 +1,5 @@
 [
+  { "date": "2026-08-24", "text": "Each row of the timing panel is now a small chart instead of a number: the band spans the shortest to the typical gap over the last 7 days, and the marker is how long it has been since the last one. Inside the band means there is time yet, off the right-hand end means the puppy is due — and a row with only one event so far says so instead of drawing an empty axis" },
   { "date": "2026-08-24", "text": "The timing panel now covers meals too — typical and shortest time between them, alongside the pee and poo gaps — so you can see the feeding rhythm the same way. It is titled just “Timing” now that it is no longer only about bathroom breaks" },
   { "date": "2026-08-24", "text": "The “By hour of day” chart is now tappable: tap any block to read what it counts (“3 meals between 07:00 and 08:00”) just under the chart — until now that number only showed as a hover tooltip, which phones never get. The block you tapped gets a ring; tap it again to clear it" },
   { "date": "2026-08-21", "text": "The sleep timer pill in the day bar — the one that appears once you've scrolled past the big timer — is now tappable: tap it while the puppy is asleep to log the wake-up, or while awake to log a sleep start, without scrolling back up to the buttons" },