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/message/EditHistoryModal.tsx

@@ -20,6 +20,7 @@ import {
 import { MatrixEvent, Room } from 'matrix-js-sdk';
 import { useMatrixClient } from '../../../hooks/useMatrixClient';
 import { stopPropagation } from '../../../utils/keyboard';
+import { useModalStyle } from '../../../hooks/useModalStyle';
 import { sanitizeCustomHtml } from '../../../utils/sanitize';
 import { LINKIFY_OPTS } from '../../../plugins/react-custom-html-parser';
 import { AsyncStatus, useAsyncCallback } from '../../../hooks/useAsyncCallback';
@@ -92,6 +93,7 @@ function getVersionContent(evt: MatrixEvent): ReactNode {
 
 export function EditHistoryModal({ room, mEvent, onClose }: EditHistoryModalProps) {
   const mx = useMatrixClient();
+  const modalStyle = useModalStyle(560);
   const [hour24Clock] = useSetting(settingsAtom, 'hour24Clock');
   const [dateFormatString] = useSetting(settingsAtom, 'dateFormatString');
 
@@ -167,6 +169,7 @@ export function EditHistoryModal({ room, mEvent, onClose }: EditHistoryModalProp
             role="dialog"
             aria-modal="true"
             aria-labelledby="edit-history-title"
+            style={modalStyle}
           >
             <Header
               variant="Surface"