Add missing templates

templates/register.html

@@ -0,0 +1,18 @@
+{% extends "base.html" %}
+{% block title %}Registrieren – PBT{% endblock %}
+{% block content %}
+  <h2>Registrieren</h2>
+  <form method="post">
+    <label for="username">Benutzername</label>
+    <input type="text" id="username" name="username" required autofocus>
+
+    <label for="email">E-Mail</label>
+    <input type="email" id="email" name="email" required>
+
+    <label for="password">Passwort</label>
+    <input type="password" id="password" name="password" required minlength="8">
+
+    <button type="submit">Konto erstellen</button>
+  </form>
+  <p>Schon registriert? <a href="{{ url_for('login') }}">Zum Login</a></p>
+{% endblock %}