不再支持关闭会话，并修复了修改密码页面无法自动重置无效旧会话的bug

frontend/Web/login.html

@@ -171,7 +171,6 @@
           <div class="dropdown-content">
             <a href="/login">Login</a>
             <a href="#" onclick="(async () => { await Request('logout'); await UpdateUserInfo(); })();">Logout</a>
-            <a href="#" onclick="localStorage.removeItem('session_token'); localStorage.removeItem('outhentication_key'); localStorage.removeItem('operation_count'); window.close();">Close Session</a>
             <a href="/register">Register</a>
             <a href="/passwd">Change Password</a>
             <a href="#">Admin Panel</a>