fixed problems and add AlertBox

app/Components/AlertBox/AlertBox.css

@@ -0,0 +1,32 @@
+.messageBox {
+  position: absolute;
+  padding: 0.5rem 1.25rem;
+  border-radius: 4px;
+  font-weight: bold;
+  font-size: 1.5rem;
+  text-align: center;
+  opacity: 1;
+  z-index: 100;
+  top: 0;
+  left: 0;
+  width: 100%;
+  max-width: 200px;
+}
+
+.messageBox.hidden {
+  opacity: 0;
+  pointer-events: none;
+  transition: opacity 1s ease-out;
+}
+
+.success {
+  background-color: #d1f7c4;
+  color: #000000;
+  border: 1px solid #a5d6a7;
+}
+
+.error {
+  background-color: #ffcdd2;
+  color: #000000;
+  border: 1px solid #ef9a9a;
+}

app/Components/AlertBox/AlertBox.tsx

@@ -0,0 +1,37 @@
+'use client'
+
+import { useEffect, useState } from "react";
+import "./AlertBox.css";
+
+interface AlertBoxProps {
+  message: string;
+  type: "error" | "success";
+  duration?: number;
+}
+
+export default function AlertBox({ message, type, duration = 6000 }: AlertBoxProps) {
+  const [visible, setVisible] = useState(false);
+  const [text, setText] = useState("");
+
+  useEffect(() => {
+    if (message) {
+      setText(message);
+      setVisible(true);
+
+      const timeout = setTimeout(() => {
+        setVisible(false);
+        setTimeout(() => setText(""), 500);
+      }, duration);
+
+      return () => clearTimeout(timeout);
+    }
+  }, [message, duration]);
+
+  if (!text) return null;
+
+  return (
+    <div className={`messageBox ${type} ${!visible ? "hidden" : ""}`}>
+      {text}
+    </div>
+  );
+}