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/Editor.tsx

@@ -36,7 +36,7 @@ const withInline = (editor: Editor): Editor => {
 
   editor.isInline = (element) =>
     [BlockType.Mention, BlockType.Emoticon, BlockType.Link, BlockType.Command].includes(
-      element.type
+      element.type,
     ) || isInline(element);
 
   return editor;
@@ -88,11 +88,11 @@ export const CustomEditor = forwardRef<HTMLDivElement, CustomEditorProps>(
       onChange,
       onPaste,
     },
-    ref
+    ref,
   ) => {
     const renderElement = useCallback(
       (props: RenderElementProps) => <RenderElement {...props} />,
-      []
+      [],
     );
 
     const renderLeaf = useCallback((props: RenderLeafProps) => <RenderLeaf {...props} />, []);
@@ -103,7 +103,7 @@ export const CustomEditor = forwardRef<HTMLDivElement, CustomEditorProps>(
         const shortcutToggled = toggleKeyboardShortcut(editor, evt);
         if (shortcutToggled) evt.preventDefault();
       },
-      [editor, onKeyDown]
+      [editor, onKeyDown],
     );
 
     const renderPlaceholder = useCallback(
@@ -115,7 +115,7 @@ export const CustomEditor = forwardRef<HTMLDivElement, CustomEditorProps>(
           </Text>
         </span>
       ),
-      []
+      [],
     );
 
     return (
@@ -160,5 +160,5 @@ export const CustomEditor = forwardRef<HTMLDivElement, CustomEditorProps>(
         </Slate>
       </div>
     );
-  }
+  },
 );