Add sfsr protection and admin pwd change script for powershell

templates/auth.html

@@ -4,6 +4,7 @@
 <section class="auth-layout">
   <div class="auth-copy"><span class="signal-label">MEMBER ACCESS</span><h1>{{ 'Join the circuit.' if mode == 'register' else 'Resume the signal.' }}</h1><p>Accounts let you publish and maintain your own engineering notes.</p></div>
   <form class="auth-form" method="post">
+    <input type="hidden" name="csrf_token" value="{{ csrf_token() }}">
     <label>Handle<input name="username" autocomplete="username" required pattern="[a-z0-9_-]{3,32}" placeholder="your-handle"></label>
     {% if mode == 'register' %}<label>Email<input name="email" type="email" autocomplete="email" required placeholder="you@example.com"></label>{% endif %}
     <label>Password<input name="password" type="password" autocomplete="{{ 'new-password' if mode == 'register' else 'current-password' }}" required {% if mode == 'register' %}minlength="10" placeholder="10+ characters"{% else %}placeholder="Your password"{% endif %}></label>