Refactor admin frontend into modular SPA

frontend/admin/views/users.html

@@ -0,0 +1,47 @@
+<!-- ===== Users Tab ===== -->
+<div class="card create-card">
+    <h2>Новый пользователь</h2>
+    <form id="create-form">
+        <div class="form-row">
+            <div class="form-group">
+                <label for="new-username">Имя пользователя</label>
+                <input type="text" id="new-username" placeholder="username" required>
+            </div>
+            <div class="form-group">
+                <label for="new-password">Пароль</label>
+                <input type="text" id="new-password" placeholder="password" required>
+            </div>
+            <div class="form-group">
+                <label for="new-role">Роль</label>
+                <select id="new-role">
+                    <option value="STUDENT">Студент</option>
+                    <option value="TEACHER">Преподаватель</option>
+                    <option value="ADMIN">Администратор</option>
+                </select>
+            </div>
+            <button type="submit" class="btn-primary">Создать</button>
+        </div>
+        <div class="form-alert" id="create-alert" role="alert"></div>
+    </form>
+</div>
+
+<div class="card">
+    <h2>Все пользователи</h2>
+    <div class="table-wrap">
+        <table id="users-table">
+            <thead>
+                <tr>
+                    <th>ID</th>
+                    <th>Имя пользователя</th>
+                    <th>Роль</th>
+                    <th>Действия</th>
+                </tr>
+            </thead>
+            <tbody id="users-tbody">
+                <tr>
+                    <td colspan="4" class="loading-row">Загрузка...</td>
+                </tr>
+            </tbody>
+        </table>
+    </div>
+</div>