Celebrate a logged pee/poo with emoji confetti

Tapping the pee or poo quick-log button now sets off a short burst of 💧/💩
particles from the button — pure DOM + CSS, pointer-events:none so it never
blocks taps, particles self-remove on animation end. It honours
prefers-reduced-motion, and there's a "Pee/poo confetti" switch in Settings
(device-local, on by default) to turn it off.

src/changelog.json

@@ -1,4 +1,5 @@
 [
+  { "date": "2026-08-01", "text": "Logging a pee or poo now sets off a little burst of 💧/💩 confetti from the button — a tiny celebration you can switch off in Settings (and it honours a reduced-motion preference)" },
   { "date": "2026-08-01", "text": "Tidied the header on long names and ages — the name now truncates instead of shoving the buttons, and the age reads as a compact \"16 wk · 3 mo 3 wk\"; weight-log rows are a single line again (\"Aug 1 · 16 wk\")" },
   { "date": "2026-07-26", "text": "Added a fan-chart view of the pedigree (toggle it in the header): your dog at the centre with each generation fanning outward as a ring, so many generations fit at once without the tree sprawling sideways — tap a wedge for that dog, and repeated ancestors keep their colour" },
   { "date": "2026-07-26", "text": "Added a Collapse all / Expand all toggle to the pedigree, to fold the whole tree down to your dog or open every branch at once" },