feat(explorer): dual-chain wallet metadata, native coin pricing, and UI refresh.

Add Chain 138 wallet network metadata and stats coin-price enrichment; sync frontend explorer SPA, command center, and address/token pages with backend config.

Co-authored-by: Cursor <cursoragent@cursor.com>

backend/api/rest/stats.go

@@ -23,6 +23,8 @@ type explorerStats struct {
 	GasPrices                    *explorerGasPrices            `json:"gas_prices,omitempty"`
 	NetworkUtilizationPercentage *float64                      `json:"network_utilization_percentage,omitempty"`
 	TransactionsToday            *int64                        `json:"transactions_today,omitempty"`
+	CoinPrice                    *string                       `json:"coin_price,omitempty"`
+	CoinImage                    *string                       `json:"coin_image,omitempty"`
 	Freshness                    freshness.Snapshot            `json:"freshness"`
 	Completeness                 freshness.SummaryCompleteness `json:"completeness"`
 	Sampling                     freshness.Sampling            `json:"sampling"`
@@ -268,6 +270,8 @@ func (s *Server) handleStats(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 
+	enrichNativeCoinMarket(ctx, &stats)
+
 	w.Header().Set("Content-Type", "application/json")
 	json.NewEncoder(w).Encode(stats)
 }