Model diary: a transparency log of every model update

The Methodology page lists each recompute (the finished match that
triggered it) with the biggest title-odds move it caused — the model's
thinking made visible, feeding the openness story.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/lib/i18n/en.ts

@@ -313,6 +313,10 @@ export const en = {
       pointTooltip: "predicted {predicted}% → happened {observed}% ({count})",
       caption: "The points hug the diagonal. That means the model is honest: when it says 30%, the outcome happens about 30% of the time. The calibration error (ECE) is {ece} — lower is better, and under 0.05 is excellent.",
     },
+    diary: {
+      title: "Model diary",
+      note: "Every finished match re-rates the teams and re-runs the simulation. This log shows each update and the biggest title-odds move it caused.",
+    },
     limits: {
       heading: "Honest limits",
       notAdvice: "These are model probabilities, not betting advice. The model does not use bookmaker odds, so we make no claim to beat the market. Sharp betting markets are still the best forecasters there are.",