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/output.ts

@@ -74,7 +74,7 @@ const elementToCustomHtml = (node: CustomElement, children: string): string => {
     case BlockType.Emoticon:
       return node.key.startsWith('mxc://')
         ? `<img data-mx-emoticon src="${node.key}" alt="${sanitizeText(
-            node.shortcode
+            node.shortcode,
           )}" title="${sanitizeText(node.shortcode)}" height="32" />`
         : sanitizeText(node.key);
     case BlockType.Link:
@@ -92,12 +92,12 @@ const ignoreHTMLParseInlineMD = (text: string): string =>
     text,
     HTML_TAG_REG_G,
     (match) => match[0],
-    (txt) => parseInlineMD(txt)
+    (txt) => parseInlineMD(txt),
   ).join('');
 
 export const toMatrixCustomHTML = (
   node: Descendant | Descendant[],
-  opts: OutputOptions
+  opts: OutputOptions,
 ): string => {
   let markdownLines = '';
   const parseNode = (n: Descendant, index: number, targetNodes: Descendant[]) => {