feat: initialize new React application structure with TypeScript, ESLint, and Prettier configurations, while removing legacy files and adding new components and pages for enhanced functionality

src/components/ui/Modal.tsx

@@ -0,0 +1,34 @@
+import type { PropsWithChildren, ReactNode } from 'react';
+
+interface ModalProps {
+  open: boolean;
+  title?: ReactNode;
+  onClose: () => void;
+  footer?: ReactNode;
+  width?: number | string;
+}
+
+export function Modal({ open, title, onClose, footer, width = 520, children }: PropsWithChildren<ModalProps>) {
+  if (!open) return null;
+
+  const handleMaskClick = (event: React.MouseEvent<HTMLDivElement>) => {
+    if (event.target === event.currentTarget) {
+      onClose();
+    }
+  };
+
+  return (
+    <div className="modal-overlay" onClick={handleMaskClick}>
+      <div className="modal" style={{ width }} role="dialog" aria-modal="true">
+        <div className="modal-header">
+          <div className="modal-title">{title}</div>
+          <button className="modal-close" onClick={onClose} aria-label="Close">
+            ×
+          </button>
+        </div>
+        <div className="modal-body">{children}</div>
+        {footer && <div className="modal-footer">{footer}</div>}
+      </div>
+    </div>
+  );
+}