fix(mobile): apply useModalStyle to 7 more modal dialogs

ScheduleMessageModal, PollCreator, JoinAddressPrompt, JumpToTime,
EditHistoryModal, ForwardMessageDialog, RemindMeDialog — all now
render fullscreen on mobile (≤750px) and as a capped-width box on
desktop, consistent with the existing useModalStyle pattern.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/app/features/room/jump-to-time/JumpToTime.tsx

@@ -31,6 +31,7 @@ import { getToday, getYesterday, timeDayMonthYear, timeHourMinute } from '../../
 import { DatePicker, TimePicker } from '../../../components/time-date';
 import { useSetting } from '../../../state/hooks/settings';
 import { settingsAtom } from '../../../state/settings';
+import { useModalStyle } from '../../../hooks/useModalStyle';
 
 type JumpToTimeProps = {
   onCancel: () => void;
@@ -38,6 +39,7 @@ type JumpToTimeProps = {
 };
 export function JumpToTime({ onCancel, onSubmit }: JumpToTimeProps) {
   const mx = useMatrixClient();
+  const modalStyle = useModalStyle(480);
   const room = useRoom();
   const alive = useAlive();
   const createStateEvent = useStateEvent(room, StateEvent.RoomCreate);
@@ -96,7 +98,7 @@ export function JumpToTime({ onCancel, onSubmit }: JumpToTimeProps) {
             escapeDeactivates: stopPropagation,
           }}
         >
-          <Dialog variant="Surface">
+          <Dialog variant="Surface" style={modalStyle}>
             <Header
               style={{
                 padding: `0 ${config.space.S200} 0 ${config.space.S400}`,