feat(classes): optimize teacher dashboard ui and implement grade management

src/modules/exams/components/exam-grid.tsx

@@ -0,0 +1,16 @@
+import { Exam } from "../types"
+import { ExamCard } from "./exam-card"
+
+interface ExamGridProps {
+  exams: Exam[]
+}
+
+export function ExamGrid({ exams }: ExamGridProps) {
+  return (
+    <div className="grid grid-cols-1 gap-6 sm:grid-cols-2 lg:grid-cols-3 xl:grid-cols-4">
+      {exams.map((exam) => (
+        <ExamCard key={exam.id} exam={exam} />
+      ))}
+    </div>
+  )
+}