Improve async error handling, loading states, and UI stability across the application

src/app/error.tsx

@@ -0,0 +1,33 @@
+"use client";
+
+import { useEffect } from "react";
+
+export default function Error({
+  error,
+  reset,
+}: {
+  error: Error & { digest?: string };
+  reset: () => void;
+}) {
+
+
+  useEffect(() => {
+    // Log the error to an error reporting service or console to satisfy lint rules
+    console.error("Application error captured:", error);
+  }, [error]);
+
+  return ( 
+    <div className="flex flex-col items-center justify-center min-h-screen gap-4">
+      <h2 className="text-2xl font-bold">Something went wrong</h2>
+      <p className="text-sm text-gray-500">
+        {error.message || "An unexpected error occurred."}
+      </p>
+      <button
+        onClick={() => reset()}
+        className="px-4 py-2 text-white transition-colors bg-black rounded hover:bg-gray-800"
+      >
+        Try Again
+      </button>
+    </div>
+  );
+}

src/app/loading.tsx

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+export default function Loading() {
+  return (
+    <div 
+      className="flex items-center justify-center min-h-screen bg-transparent"
+      role="status"
+      aria-label="Loading page content"
+    >
+      <div className="w-12 h-12 border-2 border-gray-200 rounded-full animate-spin border-b-black" />
+
+      <span className="sr-only">Loading...</span>
+    </div>
+  );
+}

src/components/loader.tsx

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+export default function Loader() {
+  return (
+    <div 
+      className="flex items-center justify-center p-6"
+      role="status"
+      aria-label="Loading"
+
+
+    >
+      <div className="w-10 h-10 border-2 border-gray-200 rounded-full animate-spin border-b-black" />
+      <span className="sr-only">Loading...</span>
+    </div>
+  );
+}