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/common-settings/general/RoomPublish.tsx

@@ -23,7 +23,7 @@ export function RoomPublish({ permissions }: RoomPublishProps) {
 
   const canEditCanonical = permissions.stateEvent(
     StateEvent.RoomCanonicalAlias,
-    mx.getSafeUserId()
+    mx.getSafeUserId(),
   );
   const joinRuleEvent = useStateEvent(room, StateEvent.RoomJoinRules);
   const content = joinRuleEvent?.getContent<RoomJoinRulesEventContent>();