Refactor code structure and remove redundant changes

src-old/hooks/useAuthModal.tsx

@@ -0,0 +1,10 @@
+import { useContext } from 'react';
+import { AuthModalContext } from '@/contexts/AuthModalContext';
+
+export const useAuthModal = () => {
+  const context = useContext(AuthModalContext);
+  if (!context) {
+    throw new Error('useAuthModal must be used within AuthModalProvider');
+  }
+  return context;
+};