Convert social and federation profile from Jinja to SX rendering

Add primitives (replace, strip-tags, slice, csrf-token), convert all
social blueprint routes and federation profile to SX content builders,
delete 12 unused Jinja templates and social_lite layout.

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

federation/templates/federation/profile.html

@@ -1,32 +0,0 @@
-{% extends "_types/social/index.html" %}
-{% block title %}@{{ actor.preferred_username }} — Rose Ash{% endblock %}
-{% block social_content %}
-<div class="py-8">
-  <div class="bg-white rounded-lg shadow p-6 mb-6">
-    <h1 class="text-2xl font-bold">{{ actor.display_name or actor.preferred_username }}</h1>
-    <p class="text-stone-500">@{{ actor.preferred_username }}@{{ config.get('ap_domain', 'rose-ash.com') }}</p>
-    {% if actor.summary %}
-      <p class="mt-2">{{ actor.summary }}</p>
-    {% endif %}
-  </div>
-
-  <h2 class="text-xl font-bold mb-4">Activities ({{ total }})</h2>
-  {% if activities %}
-    <div class="space-y-4">
-      {% for a in activities %}
-        <div class="bg-white rounded-lg shadow p-4">
-          <div class="flex justify-between items-start">
-            <span class="font-medium">{{ a.activity_type }}</span>
-            <span class="text-sm text-stone-400">{{ a.published.strftime('%Y-%m-%d %H:%M') if a.published }}</span>
-          </div>
-          {% if a.object_type %}
-            <span class="text-sm text-stone-500">{{ a.object_type }}</span>
-          {% endif %}
-        </div>
-      {% endfor %}
-    </div>
-  {% else %}
-    <p class="text-stone-500">No activities yet.</p>
-  {% endif %}
-</div>
-{% endblock %}