fix: restore case study drawer interactions

src/components/CaseStudyContent.tsx

@@ -24,7 +24,7 @@ export function CaseStudyContent({
     <article className={styles.content}>
       <header className={styles.hero}>
         <p className={styles.date}>{project.date}</p>
-        <h1 id="case-study-title" className={styles.title} tabIndex={-1} data-case-study-heading>
+        <h1 id="case-study-title" className={styles.title}>
           {project.title}
         </h1>
         <p id="case-study-introduction" className={styles.introduction}>{caseStudy.introduction}</p>