Add Shared Media drawer and harden same-room navigation.

Widen the media panel, support skinny full-page mode, keep jump-to-latest and return-to-previous reliable, and stop same-room event jumps from remounting the outlet or yanking the sidebar.

src/app/features/message-search/MessageSearch.tsx

@@ -16,7 +16,7 @@ import { useRoomNavigate } from '../../hooks/useRoomNavigate';
 import { ScrollTopContainer } from '../../components/scroll-top-container';
 import { ContainerColor } from '../../styles/ContainerColor.css';
 import { decodeSearchParamValueArray, encodeSearchParamValueArray } from '../../pages/pathUtils';
-import { useRooms } from '../../state/hooks/roomList';
+import { useRooms, useDirects } from '../../state/hooks/roomList';
 import { allRoomsAtom } from '../../state/room-list/roomList';
 import { mDirectAtom } from '../../state/mDirectList';
 import { MessageSearchParams, useMessageSearch } from './useMessageSearch';
@@ -53,7 +53,13 @@ export function MessageSearch({
 }: MessageSearchProps) {
   const mx = useMatrixClient();
   const mDirects = useAtomValue(mDirectAtom);
-  const allRooms = useRooms(mx, allRoomsAtom, mDirects);
+  const nonDirectRooms = useRooms(mx, allRoomsAtom, mDirects);
+  const directRooms = useDirects(mx, allRoomsAtom, mDirects);
+  // Include DMs — previously useRooms alone stripped them and broke DM search
+  const allRooms = useMemo(
+    () => [...nonDirectRooms, ...directRooms],
+    [nonDirectRooms, directRooms]
+  );
   const [mediaAutoLoad] = useSetting(settingsAtom, 'mediaAutoLoad');
   const [urlPreview] = useSetting(settingsAtom, 'urlPreview');
   const [legacyUsernameColor] = useSetting(settingsAtom, 'legacyUsernameColor');