Feat: Add middleware to protect dashboard and API routes

middleware.js

@@ -0,0 +1,29 @@
+import { NextResponse } from 'next/server';
+import { verifySession } from './lib/auth';
+
+// Define which paths should trigger this middleware
+export const config = {
+  matcher: [
+    '/dashboard/:path*', 
+    '/api/state', 
+    '/api/trades'
+  ],
+};
+
+export async function middleware(req) {
+  const token = req.cookies.get('kalbot_session')?.value;
+  const isValid = await verifySession(token);
+
+  if (!isValid) {
+    // If they are trying to hit an API endpoint without a session, return 401
+    if (req.nextUrl.pathname.startsWith('/api/')) {
+      return NextResponse.json({ error: 'Unauthorized. Nice try!' }, { status: 401 });
+    }
+    
+    // Otherwise, boot them back to the login page
+    return NextResponse.redirect(new URL('/', req.url));
+  }
+
+  // Session is valid, allow the request to proceed
+  return NextResponse.next();
+}