Release v0.20: регистрация, авторизация, личный кабинет

Co-authored-by: Cursor <cursoragent@cursor.com>

internal/web/templates/layout.html

@@ -15,16 +15,27 @@
     <div class="container header-inner">
       <a href="/" class="logo">Shop<span>Nova</span></a>
       <nav class="nav">
-        <a href="/" class="nav-link active">Главная</a>
-        <a href="#catalog" class="nav-link">Каталог</a>
-        <a href="#categories" class="nav-link">Категории</a>
+        <a href="/" class="nav-link{{if eq .Nav "home"}} active{{end}}">Главная</a>
+        <a href="/#catalog" class="nav-link">Каталог</a>
+        {{if .User}}
+        <a href="/account" class="nav-link{{if eq .Nav "account"}} active{{end}}">Личный кабинет</a>
+        {{end}}
       </nav>
       <div class="header-actions">
-        <button type="button" class="btn btn-ghost" aria-label="Поиск">Поиск</button>
-        <button type="button" class="btn btn-primary">Корзина</button>
+        {{if .User}}
+        <span class="user-greeting">{{.User.Name}}</span>
+        <form method="POST" action="/logout" class="inline-form">
+          <button type="submit" class="btn btn-ghost">Выйти</button>
+        </form>
+        {{else}}
+        <a href="/login" class="btn btn-ghost">Вход</a>
+        <a href="/register" class="btn btn-primary">Регистрация</a>
+        {{end}}
       </div>
     </div>
   </header>
+  {{if .Success}}<div class="container"><p class="alert alert-success">{{.Success}}</p></div>{{end}}
+  {{if .Error}}<div class="container"><p class="alert alert-error">{{.Error}}</p></div>{{end}}
   <main>
     {{template "content" .}}
   </main>