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/login.html

@@ -0,0 +1,23 @@
+{% extends "base.html" %}
+{% block title %}Вход — EvoSync{% endblock %}
+
+{% block content %}
+<div class="form-card">
+    <h1>Вход</h1>
+    <form method="post" action="/login">
+        <div class="form-group">
+            <label for="email">Email</label>
+            <input type="email" id="email" name="email" value="{{ form.email if form else '' }}" required>
+        </div>
+        <div class="form-group">
+            <label for="password">Пароль</label>
+            <input type="password" id="password" name="password" required>
+        </div>
+        <button type="submit" class="btn btn-primary">Войти</button>
+    </form>
+    <div class="form-links">
+        <a href="/forgot-password">Забыли пароль?</a><br>
+        <a href="/register">Зарегистрироваться</a>
+    </div>
+</div>
+{% endblock %}