Initial commit: gamer project

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

public/js/auth.js

@@ -0,0 +1,29 @@
+async function doLogin() {
+  const user = document.getElementById('loginUser').value.trim();
+  const pass = document.getElementById('loginPass').value.trim();
+  if (!user || !pass) { document.getElementById('loginError').textContent = '请输入用户名和密码'; return; }
+  try {
+    const res = await fetch(API + '/api/login', {
+      method: 'POST',
+      headers: { 'Content-Type': 'application/json' },
+      body: JSON.stringify({ username: user, password: pass })
+    });
+    const data = await res.json();
+    if (!res.ok) { document.getElementById('loginError').textContent = data.error; return; }
+    token = data.token;
+    username = data.username;
+    localStorage.setItem('token', token);
+    localStorage.setItem('username', username);
+    showPage('homePage');
+  } catch (e) {
+    document.getElementById('loginError').textContent = '网络错误';
+  }
+}
+
+function doLogout() {
+  token = null;
+  username = null;
+  localStorage.removeItem('token');
+  localStorage.removeItem('username');
+  showPage('loginPage');
+}