refactoring

frontend/src/components/Spinner.tsx

@@ -0,0 +1,12 @@
+interface SpinnerProps {
+  /** Height/width class (default: h-12 w-12) */
+  size?: string;
+}
+
+export function Spinner({ size = 'h-12 w-12' }: SpinnerProps) {
+  return (
+    <div className="flex items-center justify-center h-64">
+      <div className={`animate-spin rounded-full ${size} border-b-2 border-primary-600`} />
+    </div>
+  );
+}