Ship AIVPN smart protocol picker and bump to v3.0.0.

Heuristic selection (stealth/balanced/speed) for invites, guest create, and user connections.

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

templates/settings.html

@@ -1560,6 +1560,7 @@
         hysteria: 'Hysteria 2',
         naiveproxy: 'NaiveProxy',
         mieru: 'Mieru',
+        aivpn: 'AIVPN (auto)',
         xui: '3x-ui VLESS',
     };
     function protoTitle(key) {
@@ -1602,6 +1603,12 @@
             opt.textContent = _('no_protocols');
             protoSel.appendChild(opt);
         } else {
+            const aivpnOpt = document.createElement('option');
+            aivpnOpt.value = 'aivpn';
+            aivpnOpt.textContent = _('aivpn_protocol_option') || 'AIVPN (auto)';
+            if (prefer === 'aivpn') aivpnOpt.selected = true;
+            protoSel.appendChild(aivpnOpt);
+
             installed.forEach(key => {
                 const opt = document.createElement('option');
                 opt.value = key;