chore: upgrade i18next 26, prettier 3, fontsource-variable, domhandler 6, lint-staged 17

- i18next 23->26 + react-i18next 15->17
- prettier 2->3, reformat all files
- replace @fontsource/inter with @fontsource-variable/inter 5, update import path
- domhandler 5->6 (aligns with transitive deps)
- lint-staged 16->17

src/app/features/room/RoomViewFollowing.tsx

@@ -40,7 +40,8 @@ export const RoomViewFollowing = as<'div', RoomViewFollowingProps>(
     const names = latestEventReaders
       .filter((readerId) => readerId !== mx.getUserId())
       .map(
-        (readerId) => getMemberDisplayName(room, readerId) ?? getMxIdLocalPart(readerId) ?? readerId
+        (readerId) =>
+          getMemberDisplayName(room, readerId) ?? getMxIdLocalPart(readerId) ?? readerId,
       );
 
     const eventId = latestEvent?.getId();
@@ -141,5 +142,5 @@ export const RoomViewFollowing = as<'div', RoomViewFollowingProps>(
         </Box>
       </>
     );
-  }
+  },
 );