feat: explorer API, wallet, CCIP scripts, and config refresh

- Backend REST/gateway/track routes, analytics, Blockscout proxy paths.
- Frontend wallet and liquidity surfaces; MetaMask token list alignment.
- Deployment docs, verification scripts, address inventory updates.

Check: go build ./... under backend/ (pass).
Made-with: Cursor

backend/api/rest/ai_runtime.go

@@ -3,11 +3,12 @@ package rest
 import (
 	"encoding/json"
 	"log"
-	"net"
 	"net/http"
 	"strings"
 	"sync"
 	"time"
+
+	httpmiddleware "github.com/explorer/backend/libs/go-http-middleware"
 )
 
 type AIRateLimiter struct {
@@ -158,22 +159,7 @@ func (m *AIMetrics) Snapshot() map[string]any {
 }
 
 func clientIPAddress(r *http.Request) string {
-	for _, header := range []string{"X-Forwarded-For", "X-Real-IP"} {
-		if raw := strings.TrimSpace(r.Header.Get(header)); raw != "" {
-			if header == "X-Forwarded-For" {
-				parts := strings.Split(raw, ",")
-				if len(parts) > 0 {
-					return strings.TrimSpace(parts[0])
-				}
-			}
-			return raw
-		}
-	}
-	host, _, err := net.SplitHostPort(strings.TrimSpace(r.RemoteAddr))
-	if err == nil && host != "" {
-		return host
-	}
-	return strings.TrimSpace(r.RemoteAddr)
+	return httpmiddleware.ClientIP(r)
 }
 
 func explorerAIContextRateLimit() (int, time.Duration) {