Group qualification scenarios: who's through, who needs what

Once a group reaches its closing stretch (≤3 open matches), every
remaining win/draw/loss combination is enumerated and ranked with the
real tiebreaker logic. Under each table: Top 2 secured / Top 2 with a
win / Still possible (n of N outcomes) / Can't reach the top 2 — with
an honest footnote that tight cases hinge on goal difference and third
place runs through the cross-group best-thirds race. Pure, tested
enumeration in src/lib/scenarios.ts.

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

src/lib/i18n/en.ts

@@ -147,6 +147,12 @@ export const en = {
     allTeams: "All 48 teams",
     legendTop2: "Top 2 — advance",
     legendThird: "3rd — still in the race for best third",
+    scenarios: "Final-round scenarios",
+    scThrough: "Top 2 secured",
+    scWin: "Top 2 with a win",
+    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.",
     tableHeaderPldPts: "Pld · Pts",
     colTeam: "Team",
     colPlayed: "P",