Add NaiveProxy client hint for v2rayN IPv6 DNS failures.

Show guidance when copying config if latency fails due to Google DNS over IPv6.

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

templates/server.html

@@ -986,6 +986,7 @@
         <div class="config-panel active" id="panel-conf">
             <div class="config-display">
                 <div class="config-text" id="configText"></div>
+                <div class="form-hint hidden" id="configClientHint" style="margin-top: var(--space-sm);"></div>
                 <div class="config-actions">
                     <button class="btn btn-secondary btn-sm" onclick="copyToClipboard(currentConfig)" style="flex:1">
                         {{ _('copy') }}
@@ -2840,6 +2841,16 @@
                 document.getElementById('configModalTitle').textContent = `${_('config')} — ${connName}`;
                 document.getElementById('configText').textContent = result.config;
                 document.getElementById('vpnLinkText').textContent = currentVpnLink;
+                const hintEl = document.getElementById('configClientHint');
+                if (hintEl) {
+                    if (protoBase(proto) === 'naiveproxy') {
+                        hintEl.textContent = _('naiveproxy_client_hint');
+                        hintEl.classList.remove('hidden');
+                    } else {
+                        hintEl.textContent = '';
+                        hintEl.classList.add('hidden');
+                    }
+                }
                 switchConfigTab('conf');
                 openModal('configModal');
                 generateQR(result.config);