Initial commit

app/components/error/ErrorView.tsx

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+export function ErrorView() {
+    return (
+        <div>
+            <p>Ups, an unexpected error occurred.</p>
+        </div>
+    );
+}

app/components/layout/Footer.tsx

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+export function Footer() {
+  return (
+    <footer className="max-w-6xl mx-auto px-4 py-12 border-t border-slate-200 mt-12">
+      <div className="text-center">
+        <p className="text-sm text-slate-500">
+          Copyright &copy; {new Date().getFullYear()} Brainster Next College.
+          All rights reserved.<br />
+          Icons by <a href="https://icons8.com/" target="_blank" rel="noopener noreferrer">Icons8</a>
+        </p>
+      </div>
+    </footer>
+  );
+}

app/components/layout/Header.tsx

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+export function Header() {
+  return (
+    <header className="bg-white border-b border-slate-200 sticky top-0 z-10">
+      <div className="max-w-6xl mx-auto px-4 py-3 h-auto min-h-16 flex items-center justify-between">
+        <div className="flex items-center space-x-3">
+          <div className="bg-blue-600 p-2 rounded-lg shrink-0">
+            <img
+              src="https://img.icons8.com/ios-filled/50/ffffff/flash-on.png"
+              className="w-5 h-5 object-contain"
+              alt="logo"
+            />
+          </div>
+          <div>
+            <h1 className="font-bold text-lg leading-tight">
+              Distributed Systems and Blockchain
+            </h1>
+            <p className="text-xs text-slate-500">Brainster Next College</p>
+          </div>
+        </div>
+
+        <div className="flex items-center space-x-4">
+          <p className="text-sm text-slate-500 hidden md:block">Chain: Next Testnet</p>
+
+          <button className="bg-blue-600 hover:bg-blue-700 text-white px-4 py-2 rounded-xl text-sm font-semibold transition-all shadow-sm">
+            Connect Wallet
+          </button>
+        </div>
+      </div>
+    </header>
+  );
+}

app/components/layout/Sidebar.tsx

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+import { Link, useLocation } from "react-router";
+
+const navItems = [{ route: "/", label: "Explorer", icon: "home" }];
+
+export function Sidebar() {
+  const location = useLocation();
+
+  return (
+    <aside className="lg:col-span-3">
+      <nav className="space-y-1">
+        {navItems.map((item) => (
+          <Link
+            key={item.route}
+            to={item.route}
+            className={`w-full flex items-center space-x-3 px-4 py-3 rounded-xl text-sm font-medium transition-colors ${
+              location.pathname === item.route
+                ? "bg-blue-50 text-blue-700 border border-blue-100"
+                : "text-slate-600 hover:bg-slate-100"
+            }`}
+          >
+            <img
+              src={
+                location.pathname === item.route
+                  ? `https://img.icons8.com/ios-filled/50/2563eb/${item.icon}.png`
+                  : `https://img.icons8.com/ios/50/64748b/${item.icon}.png`
+              }
+              className="w-5 h-5 shrink-0 object-contain"
+              alt={item.label}
+            />
+            <span>{item.label}</span>
+          </Link>
+        ))}
+      </nav>
+    </aside>
+  );
+}

app/components/loading/LoadingView.tsx

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+export function LoadingView() {
+    return (
+        <div className="flex justify-center items-center">
+            <p className="sr-only">Loading...</p>
+        </div>
+    );
+}