copy: flip visible wordmark → Roundtable

Updates nav brand, page <title> blocks across all templates, and the
read-only share view footer. Removes duplicate Roundtable heading from
login card now that the nav wordmark reads correctly.

roundtable/templates/ansible/browse.html

@@ -1,5 +1,5 @@
 {% extends "base.html" %}
-{% block title %}Browse Playbooks — Fabled Scryer{% endblock %}
+{% block title %}Browse Playbooks — Roundtable{% endblock %}
 {% block content %}
 <div style="display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem;">
     <h1 class="page-title" style="margin-bottom:0;">Browse Playbooks</h1>

roundtable/templates/ansible/index.html

@@ -1,5 +1,5 @@
 {% extends "base.html" %}
-{% block title %}Ansible Runs — Fabled Scryer{% endblock %}
+{% block title %}Ansible Runs — Roundtable{% endblock %}
 {% block content %}
 <div style="display:flex;align-items:center;justify-content:space-between;margin-bottom:1.5rem;">
     <h1 class="page-title" style="margin-bottom:0;">Ansible Runs</h1>

roundtable/templates/ansible/run_detail.html

@@ -1,5 +1,5 @@
 {% extends "base.html" %}
-{% block title %}Run {{ run.id[:8] }} — Fabled Scryer{% endblock %}
+{% block title %}Run {{ run.id[:8] }} — Roundtable{% endblock %}
 {% block content %}
 <div style="display:flex;align-items:center;gap:1rem;margin-bottom:1.5rem;">
     <a href="/ansible/" class="btn btn-ghost btn-sm">← Runs</a>