fix(presence): make sendPresence toggle work for classic sync too

Author: Evie Gauthier

src/app/pages/client/ClientNonUIFeatures.tsx

@@ -1,7 +1,7 @@
 import { useAtomValue, useSetAtom } from 'jotai';
 import { ReactNode, useCallback, useEffect, useRef } from 'react';
 import { useNavigate } from 'react-router-dom';
-import { PushProcessor, RoomEvent, RoomEventHandlerMap } from '$types/matrix-sdk';
+import { PushProcessor, RoomEvent, RoomEventHandlerMap, SetPresence } from '$types/matrix-sdk';
 import parse from 'html-react-parser';
 import { getReactCustomHtmlParser, LINKIFY_OPTS } from '$plugins/react-custom-html-parser';
 import { sanitizeCustomHtml } from '$utils/sanitize';
@@ -566,6 +566,10 @@ function PresenceFeature() {
   const [sendPresence] = useSetting(settingsAtom, 'sendPresence');
 
   useEffect(() => {
+    // Classic sync: set_presence query param on every /sync poll.
+    // Passing undefined restores the default (online); Offline suppresses broadcasting.
+    mx.setSyncPresence(sendPresence ? undefined : SetPresence.Offline);
+    // Sliding sync: enable/disable the presence extension on the next poll.
     getSlidingSyncManager(mx)?.setPresenceEnabled(sendPresence);
   }, [mx, sendPresence]);