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/email_confirmed.html

@@ -0,0 +1,10 @@
+{% extends "base.html" %}
+{% block title %}Email подтвержден — EvoSync{% endblock %}
+
+{% block content %}
+<div class="message-card">
+    <h1>Email подтвержден!</h1>
+    <p>Ваш email успешно подтвержден. Теперь вы можете войти в систему.</p>
+    <p><a href="/login">Войти</a></p>
+</div>
+{% endblock %}