feat: Implement dark mode support by adjusting background and text colors across various pages and components.

web/studio/src/app/lti/deep-linking/page.tsx

@@ -202,7 +202,7 @@ function DeepLinkingPickerContent() {
 
 export default function DeepLinkingPicker() {
     return (
-        <Suspense fallback={<div className="min-h-screen bg-gray-950 flex items-center justify-center"><div className="w-8 h-8 border-4 border-blue-600 border-t-transparent rounded-full animate-spin" /></div>}>
+        <Suspense fallback={<div className="min-h-screen bg-transparent flex items-center justify-center"><div className="w-8 h-8 border-4 border-blue-600 border-t-transparent rounded-full animate-spin" /></div>}>
             <DeepLinkingPickerContent />
         </Suspense>
     );