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-settings/RoomSettings.tsx

@@ -53,7 +53,7 @@ const useRoomSettingsMenuItems = (): RoomSettingsMenuItem[] =>
         icon: Icons.Terminal,
       },
     ],
-    []
+    [],
   );
 
 type RoomSettingsProps = {
@@ -71,7 +71,7 @@ export function RoomSettings({ initialPage, requestClose }: RoomSettingsProps) {
   const joinRuleContent = useRoomJoinRule(room);
 
   const avatarUrl = roomAvatar
-    ? mxcUrlToHttp(mx, roomAvatar, useAuthentication, 96, 96, 'crop') ?? undefined
+    ? (mxcUrlToHttp(mx, roomAvatar, useAuthentication, 96, 96, 'crop') ?? undefined)
     : undefined;
 
   const screenSize = useScreenSizeContext();