Compare page: any two teams, model matchup + 150-year record

/compare (also in the mobile More sheet): pick any two of the 48 —
defaults to the top title favourites — and get the model's
neutral-ground matchup plus the full head-to-head from the historical
archive (wins/draws/goals and the last six meetings).

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

src/lib/i18n/en.ts

@@ -11,6 +11,7 @@ export const en = {
     story: "Story",
     teams: "Teams",
     data: "Data",
+    compare: "Compare",
     more: "More",
   },
   common: {
@@ -104,6 +105,15 @@ export const en = {
     lineups: "Lineups",
     keyPlayers: "Key players (all-time top scorers)",
   },
+  compare: {
+    title: "Compare",
+    subtitle: "Any two of the 48, side by side: the model's matchup and the full historical record.",
+    modelMatchup: "Model matchup (neutral ground)",
+    neutralNote: "Hypothetical, on neutral ground — the model's current view of these two squads.",
+    samePick: "Pick two different teams.",
+    neverMet: "These two have never met in 150 years of internationals.",
+    goals: "Goals: {a} – {b}",
+  },
   search: {
     title: "Search",
     placeholder: "Team or match…",