Best-thirds race: the cross-group table nobody can track by eye

All twelve third-placed teams ranked by points/GD/goals under the
group grid — top 8 highlighted (they reach the Round of 32), the rest
dimmed. Appears once group play has started.

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

src/lib/i18n/en.ts

@@ -173,6 +173,8 @@ export const en = {
     scAlive: "Still possible ({n}/{total} outcomes)",
     scOut: "Can't reach the top 2",
     scNote: "Scenarios count win/draw/loss outcomes of the remaining group matches; tight cases can still hinge on goal difference. Third place runs through the best-thirds race across all groups.",
+    thirdsRace: "Best-thirds race",
+    thirdsRaceNote: "All third-placed teams ranked by points, goal difference and goals — the top 8 advance to the Round of 32. Played · GD · Points.",
     tableHeaderPldPts: "Pld · Pts",
     colTeam: "Team",
     colPlayed: "P",