fix: synchronize WebRTC privacy mode state

src/app.jsx

@@ -1752,7 +1752,7 @@ import { installDebugWindowHooks } from './utils/debugWindowHooks.js';
                     React.useEffect(() => {
                         try { localStorage.setItem('securebit_relay_only_mode', String(relayOnlyMode)); } catch {}
                         if (webrtcManagerRef.current?._config?.webrtc) {
-                            webrtcManagerRef.current._config.webrtc.relayOnly = relayOnlyMode;
+                            webrtcManagerRef.current._setRelayOnlyMode(relayOnlyMode);
                         }
                     }, [relayOnlyMode]);
                     

src/network/EnhancedSecureWebRTCManager.js

@@ -153,12 +153,13 @@ class EnhancedSecureWebRTCManager {
                 useRandomHeaders: config.antiFingerprinting?.useRandomHeaders ?? false
             },
             webrtc: {
-                // `privacyMode` is the explicit operator-facing setting.
-                // Keep `relayOnly` as a backward-compatible alias.
+                // `privacyMode` is canonical; `relayOnly` remains a
+                // backward-compatible input alias at construction time.
                 privacyMode: config.webrtc?.privacyMode
                     ?? (config.webrtc?.relayOnly ? 'relay-only' : 'standard'),
-                relayOnly: config.webrtc?.relayOnly
-                    ?? config.webrtc?.privacyMode === 'relay-only',
+                relayOnly: config.webrtc?.privacyMode
+                    ? config.webrtc.privacyMode === 'relay-only'
+                    : config.webrtc?.relayOnly ?? false,
                 iceServers: config.webrtc?.iceServers
                     ?? EnhancedSecureWebRTCManager.DEFAULT_ICE_SERVERS.map(server => ({ ...server }))
             }
@@ -7263,8 +7264,13 @@ async processMessage(data) {
     }
 
     _isRelayOnlyMode() {
-        return this._config.webrtc.privacyMode === 'relay-only'
-            || this._config.webrtc.relayOnly === true;
+        return this._config.webrtc.privacyMode === 'relay-only';
+    }
+
+    _setRelayOnlyMode(relayOnly) {
+        const enabled = relayOnly === true;
+        this._config.webrtc.privacyMode = enabled ? 'relay-only' : 'standard';
+        this._config.webrtc.relayOnly = enabled;
     }
 
     _warnIfTurnMissing() {