feat(telemetry): product interaction events

- h2h_viewed from match card, dock, profile, stats, predictions
- reaction_sent with emoji and surface; score_report_opened from all
  three report entry points
- stats_filtered and stats_sorted on stats route and profile
- rules/teams/players/bracket/tournament view events with sources
- match_history_viewed, badge_viewed, player_searched (count only)

src/lib/telemetry/rollup-core.ts

@@ -14,7 +14,7 @@ export interface ClientEventRow {
   session_id?: string;
   route_id?: string;
   value?: number;
-  props?: { source?: string; emoji?: string; tournament?: string } | null;
+  props?: { source?: string; emoji?: string; tournament?: string; value?: string } | null;
 }
 
 export interface ClientErrorRow {
@@ -78,8 +78,10 @@ export const newClientEventAccumulator = (): ClientEventAccumulator => ({
   eventDetails: new Map(),
 });
 
+// emoji first: reaction_sent carries both emoji and source, and its aggregate
+// breakdown should be by emoji.
 const eventDetail = (row: ClientEventRow): string | undefined =>
-  row.props?.source ?? row.props?.emoji ?? row.props?.tournament;
+  row.props?.emoji ?? row.props?.value ?? row.props?.source ?? row.props?.tournament;
 
 export const accumulateClientEvents = (acc: ClientEventAccumulator, rows: ClientEventRow[]) => {
   for (const row of rows) {