feat(telemetry): matchup and direction context in timelines; live error groups

- h2h_viewed carries who-v-who, stats_sorted carries asc/desc via a
  timeline-only context prop
- error browser aggregates raw rows so new groups appear immediately
- catalogs re-extracted for shifted line references

src/features/matches/components/match-card.tsx

@@ -42,7 +42,10 @@ const MatchCard = ({ match, hideH2H = false }: MatchCardProps) => {
 
   const handleH2HClick = (e: React.MouseEvent) => {
     e.stopPropagation();
-    track("h2h_viewed", { source: "match_card" });
+    track("h2h_viewed", {
+      source: "match_card",
+      context: [match.home?.name, match.away?.name].filter(Boolean).join(" v "),
+    });
     h2hSheet.open();
   };