v3: added journal view to the index, code organization pass

src/utils/hotScore.ts

@@ -0,0 +1,6 @@
+import type { Dump } from "../model.ts";
+
+export function hotScore(dump: Dump): number {
+  const ageHours = (Date.now() - dump.createdAt.getTime()) / 3_600_000;
+  return (dump.voteCount + 1) / Math.pow(ageHours + 2, 1.5);
+}