Index: chapterx-frontend/src/components/ui/Spinner.tsx
===================================================================
--- chapterx-frontend/src/components/ui/Spinner.tsx	(revision b62cefc14094ca5ac7154f7d48797a1e6c444935)
+++ chapterx-frontend/src/components/ui/Spinner.tsx	(revision b62cefc14094ca5ac7154f7d48797a1e6c444935)
@@ -0,0 +1,31 @@
+import React from 'react'
+
+interface SpinnerProps {
+  size?: 'sm' | 'md' | 'lg'
+  className?: string
+}
+
+const sizes = { sm: 'h-4 w-4', md: 'h-8 w-8', lg: 'h-12 w-12' }
+
+export const Spinner: React.FC<SpinnerProps> = ({ size = 'md', className = '' }) => (
+  <svg
+    className={`animate-spin ${sizes[size]} text-indigo-400 ${className}`}
+    xmlns="http://www.w3.org/2000/svg"
+    fill="none"
+    viewBox="0 0 24 24"
+  >
+    <circle
+      className="opacity-25"
+      cx="12"
+      cy="12"
+      r="10"
+      stroke="currentColor"
+      strokeWidth="4"
+    />
+    <path
+      className="opacity-75"
+      fill="currentColor"
+      d="M4 12a8 8 0 018-8V0C5.373 0 0 5.373 0 12h4z"
+    />
+  </svg>
+)