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/components/editor/autocomplete/EmoticonAutocomplete.tsx

@@ -51,14 +51,14 @@ export function EmoticonAutocomplete({
     const list: Array<EmoticonSearchItem> = [];
     return list.concat(
       imagePacks.flatMap((pack) => pack.getImages(ImageUsage.Emoticon)),
-      emojis
+      emojis,
     );
   }, [imagePacks]);
 
   const [result, search, resetSearch] = useAsyncSearch(
     searchList,
     getEmoticonSearchStr,
-    SEARCH_OPTIONS
+    SEARCH_OPTIONS,
   );
   const autoCompleteEmoticon = result ? result.items.slice(0, 20) : recentEmoji;