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/call/CallView.tsx

@@ -86,7 +86,7 @@ function CallPrescreen() {
   const permissions = useRoomPermissions(creators, powerLevels);
   const hasPermission = permissions.stateEvent(
     StateEvent.GroupCallMemberPrefix,
-    mx.getSafeUserId()
+    mx.getSafeUserId(),
   );
 
   const callSession = useCallSession(room);