Give asleep a readable ink as well

--sleep was doing the same two jobs --wake had just been split out of: the
pale tint behind a timer and the text on top of it. As text it never worked —
2.57:1 on the day-bar pill, 2.79 on the big card, 2.85 on the list label — and
the dark theme was no better off than the light one, at 4.07 on the pill, which
I had assumed was fine until I measured it.

So --sleep-ink joins --wake-ink, deep blue in the light theme and a lighter one
in the dark, and the four places that painted text with --sleep now use it. The
tints, stripes, chart bars and borders keep --sleep: nothing about the colour of
sleep changes, only the colour of writing about it.

All sixteen text sites the two states cover — pill, big clock, list label and
open-row label, each state, each theme — now clear 4.5:1, the worst being 4.71.

The pedigree's ♂ keeps the raw --sleep. It is the same blue serving an unrelated
meaning, and recolouring it here would be a change to the pedigree made for
reasons that have nothing to do with it.

src/changelog.json

@@ -1,4 +1,5 @@
 [
+  { "date": "2026-08-31", "text": "The asleep timer text is a deeper blue, so “Asleep for” in the day-bar pill and on the big card is properly readable against its own pale blue background instead of the near-invisible blue-on-blue it was — the same treatment the awake gold just got, and it applies to the Asleep labels in the Sleep & wake list too" },
   { "date": "2026-08-31", "text": "The awake timer is sunshine too now — both the big “Awake for” card and the pill in the day bar — so the whole app tells asleep and awake apart by night-blue against day-gold rather than by blue against purple" },
   { "date": "2026-08-31", "text": "Awake stretches in the Sleep & wake list are sunshine yellow now instead of the app's purple — the same idea as the ☀️ on the timer pill — so asleep and awake read as night and day down the list rather than as two shades of the same accent" },
   { "date": "2026-08-31", "text": "The Walks list reads newest first as well, so a walk in progress is the top row and every list in the app now runs the same way" },