feat: static city suggestions by country, fix city dropdown, coloring animation on save

src/lib/layout/selection.svelte.js

@@ -3,8 +3,8 @@ import { nameToId } from '../shared/countries.js';
 
 let selected = $state(new Set());
 let totalCountries = $state(0);
+let flashing = $state(new Set());
 
-// Derive visited countries from journal entries
 journals.subscribe((entries) => {
   const ids = new Set();
   for (const e of entries) {
@@ -25,3 +25,16 @@ export function setTotalCount(n) {
 export function getTotalCount() {
   return totalCountries;
 }
+
+export function getFlashing() {
+  return flashing;
+}
+
+export function flashCountry(countryName) {
+  const id = nameToId[countryName];
+  if (!id) return;
+  flashing = new Set([...flashing, id]);
+  setTimeout(() => {
+    flashing = new Set([...flashing].filter(x => x !== id));
+  }, 1600);
+}