so i dont know why but nothing is working right
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>NHL Franchise Sim </title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<div class="container">
<nav>
<ul>
<li><a href="/trade.html">Trade</a></li>
<li><a href="free_agents.html">FA</a></li>
<li><a href="games.html">sechule</a></li>
</ul>
</nav>
<h1>NHL Franchise Simulator</h1>
<div id="startup-screen" class="overlay">
<div class="selection-box">
<h1>Select Your Franchise(s)</h1>
<p>Pick the teams you wish to manage for the 2024-25 season.</p>
<div id="team-grid" class="grid-container">
<!-- JavaScript will inject all 32 NHL teams here -->
</div>
<button class="btn-start" onclick="confirmSelection()">Begin Simulation</button>
</div>
</div>
<!-- Main Game Dashboard (hidden by default) -->
<div id="main-dashboard" style="display: none;">
<!-- Your existing Hub code -->
</div>
<!-- The Main Dashboard (appears after team selection) -->
<div id="main-dashboard" class="dashboard-grid">
<!-- Header Section -->
<header class="hub-header">
<h2>Franchise Mode Hub</h2>
<button class="primary-btn" id="sim-btn">Simulate Next Day</button>
</header>
<!-- Standings Section -->
<section class="standings-card">
<h3>NHL Standings</h3>
<div id="standings-container">
<!-- Standings table will be injected here -->
</div>
</section>
<!-- Recent Activity Section -->
<section class="results-card">
<h3>Recent League Results</h3>
<ul id="recent-results-list">
<!-- Game scores will be injected here -->
</ul>
</section>
</div>
<button class="btn" onclick="advanceDay()">Simulate Next Game</button>
<table>
<thead>
<tr>
<th>Team</th>
<th>W</th>
<th>L</th>
<th>OTL</th>
<th>PTS</th>
</tr>
</thead>
<tbody id="standings-body">
<!-- JavaScript will fill this -->
</tbody>
</table>
<div class="history">
<h3>Recent Results</h3>
<div id="history-box"></div>
</div>
</div>
<script src="app.js"></script>
</body>
</html>
heres the main
like i said nothing is working so next week fixing week
now it loads right but doesnt work
do me a favor

what might be broken in the code becuse i dont know i looked over it 15 times but i still cant find it