fix non-autofixable biome errors

apps/app/src/features/callout/services/callout.spec.ts

@@ -23,7 +23,7 @@ This is an info callout.
     const tree = processor.parse(markdown);
     processor.runSync(tree);
 
-    let calloutNode;
+    let calloutNode: ContainerDirective | undefined;
     visit(tree, 'containerDirective', (node) => {
       calloutNode = node;
     });

apps/app/src/features/callout/services/callout.ts

@@ -10,7 +10,10 @@ export const remarkPlugin: Plugin = () => {
     visit(tree, 'containerDirective', (node: ContainerDirective) => {
       if (AllCallout.some((name) => name === node.name.toLowerCase())) {
         const type = node.name.toLowerCase();
-        const data = node.data ?? (node.data = {});
+        if (node.data == null) {
+          node.data = {};
+        }
+        const data = node.data;
 
         // extract directive label
         const paragraphs = (node.children ?? []).filter(