feat(route-optimizer): add country and interface name display in route optimization UI

backend/routes/routeOptimizerRoutes.js

@@ -114,6 +114,7 @@ function compactServer(server) {
     ip: server?.ip || null,
     dns: server?.dns || null,
     type: server?.type || null,
+    country: server?.country || null,
     label: server?.dns || server?.ip || server?.id || 'unknown',
   };
 }
@@ -482,6 +483,7 @@ function buildRecursiveGatewayOptionsForJumphost({
       recursiveGatewayId: rgw.id || null,
       recursiveDescription: rgw.description || '',
       tunnelGatewayIp: best.physicalGatewayIp,
+      interfaceName: best.candidate.interfaceName || null,
       distance: best.distance,
       exit: best.candidate.exit,
       baseScore: best.candidate.score,
@@ -574,6 +576,7 @@ function buildCommunityOptimization({
         current: currentCandidate ? {
           gateway: currentCandidate.recursiveGateway || currentCandidate.gatewayIpForJumphost || null,
           tunnelGateway: currentCandidate.tunnelGatewayIp || currentCandidate.gatewayIpForJumphost || null,
+          interfaceName: currentCandidate.interfaceName || null,
           distance: currentCandidate.distance != null ? currentCandidate.distance : null,
           exit: currentCandidate.exit,
           score: currentCandidate.score,
@@ -584,6 +587,7 @@ function buildCommunityOptimization({
         recommended: recommendedCandidate ? {
           gateway: recommendedCandidate.recursiveGateway || recommendedCandidate.gatewayIpForJumphost || null,
           tunnelGateway: recommendedCandidate.tunnelGatewayIp || recommendedCandidate.gatewayIpForJumphost || null,
+          interfaceName: recommendedCandidate.interfaceName || null,
           distance: recommendedCandidate.distance != null ? recommendedCandidate.distance : null,
           exit: recommendedCandidate.exit,
           score: recommendedCandidate.score,

frontend/src/RouteOptimizerPage.jsx

@@ -8,6 +8,7 @@ import {
 } from '@tabler/icons-react';
 import api from './lib/api.js';
 import PageHeader from './components/PageHeader.jsx';
+import { countryToFlag } from './utils/serverUtils.js';
 
 function MetricBadge({ label, value, tone = 'secondary' }) {
   return (
@@ -237,6 +238,12 @@ export default function RouteOptimizerPage() {
                                       {r.current.distance != null ? ` (dist ${r.current.distance})` : ''}
                                     </div>
                                   )}
+                                  {(r.current?.interfaceName || r.current?.exit?.country) && (
+                                    <div className="text-muted">
+                                      {r.current?.exit?.country ? `${countryToFlag(r.current.exit.country)} ` : ''}
+                                      {r.current?.interfaceName ? `iface: ${r.current.interfaceName}` : ''}
+                                    </div>
+                                  )}
                                 </td>
                                 <td className="small">
                                   <div>{r.recommended?.gateway || '—'}</div>
@@ -246,6 +253,12 @@ export default function RouteOptimizerPage() {
                                       {r.recommended.distance != null ? ` (dist ${r.recommended.distance})` : ''}
                                     </div>
                                   )}
+                                  {(r.recommended?.interfaceName || r.recommended?.exit?.country) && (
+                                    <div className="text-muted">
+                                      {r.recommended?.exit?.country ? `${countryToFlag(r.recommended.exit.country)} ` : ''}
+                                      {r.recommended?.interfaceName ? `iface: ${r.recommended.interfaceName}` : ''}
+                                    </div>
+                                  )}
                                 </td>
                                 <td className="small">
                                   {fmtProb(r.current?.probabilityOptimal)} / {fmtProb(r.recommended?.probabilityOptimal)}