fix: deliver validated AI insight responses

internal/growth/opportunities.go

@@ -68,20 +68,37 @@ func buildOpportunities(wins []EventEffect, catalog []Event, forecast Forecast,
 			}
 		}
 	}
+	// Always surface high-intent commercial moments. Historical evidence enriches
+	// the estimate when available, but its absence must not hide events merchants
+	// routinely plan campaigns for.
+	for _, event := range catalog {
+		if event.Kind != EventCommercial || dateBefore(event.EndDate, start) {
+			continue
+		}
+		if _, exists := best[event.ID]; exists {
+			continue
+		}
+		point, ok := forecastByDate[dayKey(event.StartDate)]
+		if !ok {
+			continue
+		}
+		best[event.ID] = Opportunity{
+			EvidenceID: EvidenceID("opportunity", event.ID), EventID: event.ID,
+			EventTitleFA: event.TitleFA, Date: normalizeDate(event.StartDate),
+			ExpectedSessions: point.PaidSessions, ExpectedAmountRial: point.PaidAmountRial,
+		}
+	}
 	result := make([]Opportunity, 0, len(best))
 	for _, opportunity := range best {
 		result = append(result, opportunity)
 	}
 	slices.SortFunc(result, func(a, b Opportunity) int {
-		if a.SimilarityBPS != b.SimilarityBPS {
-			if a.SimilarityBPS > b.SimilarityBPS {
-				return -1
-			}
-			return 1
-		}
 		if comparison := a.Date.Compare(b.Date); comparison != 0 {
 			return comparison
 		}
+		if a.SimilarityBPS != b.SimilarityBPS {
+			return int(b.SimilarityBPS - a.SimilarityBPS)
+		}
 		return strings.Compare(a.EventID, b.EventID)
 	})
 	if len(result) > limit {