feat(hackathon): update team page

- update dark mode color scheme for team page: view, team edit,
  and submit project page
- fix bug in chat where messages are displayed double
- make the form field size consistent

apps/hackathon/src/app/404.tsx

@@ -2,13 +2,13 @@ import { Link } from 'react-router-dom';
 
 export default function NotFoundPage() {
   return (
-    <div className="min-h-screen flex items-center justify-center bg-gray-50">
+    <div className="min-h-screen flex items-center justify-center bg-gray-50 dark:bg-gray-950">
       <div className="text-center">
         <h1 className="text-9xl font-bold text-gray-200 mb-4">404</h1>
-        <h2 className="text-3xl font-semibold text-gray-900 mb-4">
+        <h2 className="text-3xl font-semibold text-gray-900 dark:text-gray-300 mb-4">
           Page Not Found
         </h2>
-        <p className="text-gray-600 mb-8">
+        <p className="text-gray-600 dark:text-gray-400 mb-8">
           The page you are looking for doesn't exist or has been moved.
         </p>
         <Link