Add user registration and auth web app

FastAPI + Jinja2 + MariaDB web application with registration,
login, profile, password reset, and email confirmation flows.
All UI in Russian. Styled with Evotor brand colors.

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

web/templates/message.html

@@ -0,0 +1,12 @@
+{% extends "base.html" %}
+{% block title %}{{ title }} — EvoSync{% endblock %}
+
+{% block content %}
+<div class="message-card">
+    <h1>{{ title }}</h1>
+    <p>{{ message }}</p>
+    {% if link %}
+        <p><a href="{{ link }}">{{ link_text }}</a></p>
+    {% endif %}
+</div>
+{% endblock %}