chore: replace EvoSync with ЭВОСИНК throughout UI

Update all page titles and branding in FastAPI app and templates to use Russian transliteration of product name.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

web/templates/connections.html

@@ -1,5 +1,5 @@
 {% extends "base.html" %}
-{% block title %}Подключения — EvoSync{% endblock %}
+{% block title %}Подключения — ЭВОСИНК{% endblock %}
 
 {% block content %}
 <div class="d-flex align-items-center justify-content-between mb-4">