copy: themed empty states + login tagline

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

fabledscryer/templates/auth/login.html

@@ -4,6 +4,7 @@
 <div style="max-width:400px;margin:4rem auto;">
     <div class="card">
         <h2 class="page-title">Sign In</h2>
+        <p style="color: var(--text-dim); font-family: var(--font-serif); font-style: italic; font-size: 0.95rem; margin-top: 0.25rem;">Where the realm's watch convenes.</p>
         {% if error %}
         <div style="color:var(--red);font-size:0.88rem;margin-bottom:1rem;
                     background:var(--red-dim);padding:0.6rem 0.75rem;border-radius:4px;">

fabledscryer/templates/dns/rows.html

@@ -25,5 +25,5 @@
 </div>
 {% endfor %}
 {% else %}
-<p class="empty" style="padding:0.5rem 0;">No DNS-enabled hosts. <a href="/hosts/">Enable DNS on a host →</a></p>
+<p class="empty" style="padding:0.5rem 0;">No DNS checks yet. Add one to watch.</p>
 {% endif %}