feat: Store accordion state in cookies

- Accordion state (collapsed/expanded) saved to cookies per group
- Chevron icon toggles correctly (up/down)
- State persists across page reloads for 30 days
- First accordion group opens by default

templates/dashboard.twig

@@ -79,18 +79,23 @@
 </div>
 {% else %}
 {% for groupName, group in groups %}
+{% set groupSlug = groupName|lower|replace({' ': '_', ' ': ''}) %}
 <div class="card mb-3 border-0 shadow-sm">
-    <div class="card-header text-white py-2" data-bs-toggle="collapse" data-bs-target="#group-{{ loop.index }}" style="cursor: pointer; background-color: {{ group.color|default('#6c757d') }};">
+    <div class="card-header text-white py-2 accordion-header" 
+         data-bs-toggle="collapse" 
+         data-bs-target="#group-{{ loop.index }}" 
+         data-group="{{ groupSlug }}"
+         style="cursor: pointer; background-color: {{ group.color|default('#6c757d') }};">
         <div class="d-flex justify-content-between align-items-center">
             <h5 class="mb-0">
                 <i class="{{ group.icon|default('fa-server') }}"></i>
                 {{ groupName }}
                 <span class="badge bg-light text-dark ms-2">{{ group.servers|length }}</span>
             </h5>
-            <i class="fas fa-chevron-down"></i>
+            <i class="fas accordion-icon"></i>
         </div>
     </div>
-    <div id="group-{{ loop.index }}" class="collapse show">
+    <div id="group-{{ loop.index }}" class="collapse" data-group="{{ groupSlug }}">
         <div class="card-body p-2">
             <div class="row g-2">
                 {% for server in group.servers %}
@@ -193,37 +198,98 @@
 {% endfor %}
 {% endif %}
 
-<!-- AJAX автообновление -->
+<!-- AJAX автообновление + Accordion состояние -->
 <script>
 (function() {
-    let updateInterval = null;
+    const COOKIE_NAME = 'dashboard_accordion';
 
+    // Получить состояние accordion из cookies
+    function getAccordionState() {
+        const cookies = document.cookie.split(';');
+        for (let c of cookies) {
+            c = c.trim();
+            if (c.startsWith(COOKIE_NAME + '=')) {
+                try {
+                    return JSON.parse(decodeURIComponent(c.substring(COOKIE_NAME.length + 1)));
+                } catch(e) {}
+            }
+        }
+        return {};
+    }
+
+    // Сохранить состояние accordion в cookies
+    function saveAccordionState(state) {
+        document.cookie = COOKIE_NAME + '=' + encodeURIComponent(JSON.stringify(state)) + 
+                          '; path=/; max-age=' + (30 * 24 * 60 * 60); // 30 дней
+    }
+
+    // Инициализация accordion из cookies
+    function initAccordionFromCookies() {
+        const state = getAccordionState();
+        document.querySelectorAll('.accordion-header').forEach(header => {
+            const groupId = header.dataset.group;
+            const targetId = header.dataset.bsTarget;
+            const target = document.querySelector(targetId);
+
+            if (target && state[groupId] === 'open') {
+                target.classList.add('show');
+                header.querySelector('.accordion-icon').className = 'fas fa-chevron-up';
+            } else {
+                header.querySelector('.accordion-icon').className = 'fas fa-chevron-down';
+            }
+        });
+    }
+
+    // Обработчик клика на accordion header
+    function setupAccordionHandlers() {
+        const state = getAccordionState();
+
+        document.querySelectorAll('.accordion-header').forEach(header => {
+            const groupId = header.dataset.group;
+            const targetId = header.dataset.bsTarget;
+            const target = document.querySelector(targetId);
+            const icon = header.querySelector('.accordion-icon');
+
+            // Клик переключает состояние
+            header.addEventListener('click', function() {
+                const isOpen = target.classList.contains('show');
+                if (isOpen) {
+                    target.classList.remove('show');
+                    icon.className = 'fas fa-chevron-down';
+                    state[groupId] = 'closed';
+                } else {
+                    target.classList.add('show');
+                    icon.className = 'fas fa-chevron-up';
+                    state[groupId] = 'open';
+                }
+                saveAccordionState(state);
+            });
+        });
+    }
+
+    // AJAX обновление данных
     function updateDashboard() {
         fetch('/api/dashboard/stats')
             .then(response => response.json())
             .then(data => {
                 data.forEach(server => {
-                    // CPU
                     const cpuVal = document.getElementById('cpu-val-' + server.id);
                     if (cpuVal && server.metrics.cpu_load) {
                         cpuVal.textContent = server.metrics.cpu_load.value + '%';
                     }
 
-                    // RAM
                     const ramVal = document.getElementById('ram-val-' + server.id);
                     if (ramVal && server.metrics.ram_used) {
                         ramVal.textContent = server.metrics.ram_used.value + '%';
                     }
 
-                    // Disk
                     const diskVal = document.getElementById('disk-val-' + server.id);
                     if (diskVal && server.metrics.disk) {
                         diskVal.textContent = server.metrics.disk.value + '%';
                     }
 
-                    // Updated time
                     const updatedAt = document.getElementById('updated-at-' + server.id);
-                    if (updatedAt) {
+                    if (updatedAt && server.updated_at) {
                         updatedAt.textContent = server.updated_at.split(' ')[1].substring(0, 5);
                     }
                 });
@@ -231,9 +297,11 @@
             .catch(err => console.log('Dashboard update error:', err));
     }
 
-    // Запускаем обновление каждые 30 секунд
+    // Запуск при загрузке страницы
     document.addEventListener('DOMContentLoaded', function() {
-        updateInterval = setInterval(updateDashboard, 30000);
+        initAccordionFromCookies();
+        setupAccordionHandlers();
+        setInterval(updateDashboard, 30000);
     });
 })();
 </script>