Initial Claude implementation

app/templates/login.html

@@ -0,0 +1,18 @@
+{% extends "base.html" %}
+{% block title %}Sign in · {{ app_name }}{% endblock %}
+{% block body %}
+<div class="auth-shell">
+  <form class="card auth-card" method="post" action="/login">
+    <h1>{{ app_name }}</h1>
+    <p class="muted">Sign in to continue</p>
+    {% if error %}<div class="alert">{{ error }}</div>{% endif %}
+    <label>Email
+      <input type="email" name="email" value="{{ email or '' }}" required autofocus>
+    </label>
+    <label>Password
+      <input type="password" name="password" required>
+    </label>
+    <button type="submit" class="btn btn-primary">Sign in</button>
+  </form>
+</div>
+{% endblock %}