public/assets/css/style.css

@@ -145,10 +145,26 @@ code, pre {
     overflow: hidden;
 }
 
+.sidebar::-webkit-scrollbar {
+    width: 4px;
+}
+
+.sidebar::-webkit-scrollbar-thumb {
+    background: transparent;
+}
+
+.sidebar:hover::-webkit-scrollbar-thumb {
+    background: var(--border-color);
+}
+
 .sidebar.collapsed {
     width: var(--sidebar-collapsed);
 }
 
+.sidebar.collapsed .sidebar-header::after {
+    display: none;
+}
+
 .sidebar-header {
     display: flex;
     align-items: center;
@@ -157,6 +173,18 @@ code, pre {
     border-bottom: 1px solid var(--border-color);
     height: var(--topbar-height);
     min-height: var(--topbar-height);
+    position: relative;
+}
+
+.sidebar-header::after {
+    content: '';
+    position: absolute;
+    bottom: -1px;
+    left: 1.25rem;
+    right: 1.25rem;
+    height: 2px;
+    background: linear-gradient(90deg, var(--accent), transparent);
+    border-radius: 1px;
 }
 
 .sidebar-brand {
@@ -167,6 +195,7 @@ code, pre {
     font-weight: 700;
     font-size: 1.2rem;
     white-space: nowrap;
+    text-decoration: none;
 }
 
 .sidebar-brand i {
@@ -175,7 +204,8 @@ code, pre {
 }
 
 .nav-item i,
-.nav-sub-item i {
+.nav-sub-item i,
+.nav-item-toggle i {
     pointer-events: none;
 }
 
@@ -251,19 +281,22 @@ code, pre {
     display: flex;
     align-items: center;
     gap: 0.75rem;
-    padding: 0.65rem 1.25rem;
+    padding: 0.6rem 1.25rem;
+    margin: 0 0.5rem;
     color: var(--text-secondary);
-    border-radius: 0;
+    border-radius: var(--radius-sm);
     transition: all var(--transition);
-    font-size: 0.92rem;
+    font-size: 0.9rem;
     white-space: nowrap;
-    border-left: 3px solid transparent;
+    text-decoration: none;
+    position: relative;
 }
 
 .nav-item i {
     width: 20px;
     text-align: center;
     flex-shrink: 0;
+    font-size: 1rem;
 }
 
 .nav-item:hover {
@@ -274,23 +307,35 @@ code, pre {
 .nav-item.active {
     color: var(--accent);
     background: var(--accent-light);
-    border-left-color: var(--accent);
+    font-weight: 600;
-    font-weight: 500;
+}
+
+.nav-item.active::before {
+    content: '';
+    position: absolute;
+    left: -0.5rem;
+    top: 50%;
+    transform: translateY(-50%);
+    width: 3px;
+    height: 20px;
+    background: var(--accent);
+    border-radius: 0 2px 2px 0;
 }
 
 .nav-divider {
     height: 1px;
     background: var(--border-color);
     margin: 0.5rem 1rem;
+    opacity: 0.5;
 }
 
 .nav-section {
-    padding: 0.5rem 1.25rem;
+    padding: 0.6rem 1.25rem 0.35rem;
-    font-size: 0.75rem;
+    font-size: 0.7rem;
     text-transform: uppercase;
-    letter-spacing: 0.08em;
+    letter-spacing: 0.1em;
     color: var(--text-muted);
-    font-weight: 600;
+    font-weight: 700;
     white-space: nowrap;
 }
 
@@ -312,6 +357,7 @@ code, pre {
 .sidebar.collapsed .nav-item {
     justify-content: center;
     padding: 0.65rem;
+    margin: 0 0.35rem;
 }
 
 /* ==========================================================================
@@ -670,6 +716,14 @@ code, pre {
     box-shadow: var(--shadow-sm);
 }
 
+.btn:disabled,
+.btn.disabled {
+    opacity: 0.55;
+    cursor: not-allowed;
+    transform: none !important;
+    box-shadow: none !important;
+}
+
 .btn-primary {
     background: var(--accent);
     color: white;
@@ -681,6 +735,26 @@ code, pre {
     color: white;
 }
 
+.btn-primary:disabled,
+.btn-primary.disabled {
+    background: var(--bg-tertiary);
+    color: var(--text-muted);
+    border-color: var(--border-color);
+    cursor: not-allowed;
+    transform: none;
+    box-shadow: none;
+    opacity: 0.6;
+}
+
+.btn-primary:disabled:hover,
+.btn-primary.disabled:hover {
+    background: var(--bg-tertiary);
+    color: var(--text-muted);
+    border-color: var(--border-color);
+    transform: none;
+    box-shadow: none;
+}
+
 .btn-secondary {
     background: var(--bg-tertiary);
     color: var(--text-primary);
@@ -875,13 +949,45 @@ textarea.form-input {
     gap: 0.5rem;
     cursor: pointer;
     font-size: 0.9rem;
+    position: relative;
+    padding-left: 0;
 }
 
 .checkbox-label input[type="checkbox"] {
-    width: 16px;
+    position: absolute;
-    height: 16px;
+    opacity: 0;
-    accent-color: var(--accent);
+    width: 0;
-    cursor: pointer;
+    height: 0;
+    pointer-events: none;
+}
+
+.checkbox-label .checkmark {
+    display: inline-flex;
+    align-items: center;
+    justify-content: center;
+    width: 18px;
+    height: 18px;
+    border: 2px solid var(--border-color);
+    border-radius: 4px;
+    background: var(--bg-input);
+    transition: all var(--transition);
+    flex-shrink: 0;
+    font-size: 0.65rem;
+    color: transparent;
+}
+
+.checkbox-label:hover .checkmark {
+    border-color: var(--accent);
+}
+
+.checkbox-label input[type="checkbox"]:checked + .checkmark {
+    background: var(--accent);
+    border-color: var(--accent);
+    color: #fff;
+}
+
+.checkbox-label input[type="checkbox"]:focus-visible + .checkmark {
+    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
 }
 
 .font-mono {
@@ -2340,6 +2446,7 @@ textarea.form-input {
     .sidebar.mobile-open.collapsed .nav-item {
         justify-content: flex-start;
         padding: 0.65rem 1.25rem;
+        margin: 0 0.5rem;
     }
 
     .main-area {
@@ -2379,7 +2486,8 @@ textarea.form-input {
     }
 
     .nav-sublist {
-        background: rgba(0,0,0,0.1);
+        background: rgba(0,0,0,0.06);
+        margin: 0;
     }
 }
 
@@ -2750,10 +2858,14 @@ textarea.form-input {
     gap: 0.5rem;
 }
 
+.nav-item-accordion.expanded > .nav-item-toggle {
+    color: var(--text-primary);
+}
+
 .nav-chevron {
     margin-left: auto;
-    font-size: 0.7rem;
+    font-size: 0.65rem;
-    transition: transform 0.2s;
+    transition: transform 0.25s ease;
     color: var(--text-muted);
 }
 
@@ -2765,18 +2877,22 @@ textarea.form-input {
     max-height: 0;
     overflow: hidden;
     transition: max-height 0.25s ease;
-    background: rgba(0,0,0,0.15);
+    background: rgba(0,0,0,0.08);
+    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
+    margin: 0 0.5rem;
 }
 
 .nav-sub-item {
     display: flex;
     align-items: center;
     gap: 0.5rem;
-    padding: 0.4rem 1rem 0.4rem 2.8rem;
+    padding: 0.35rem 1rem 0.35rem 2.5rem;
+    margin: 0 0.25rem;
     font-size: 0.82rem;
     color: var(--text-secondary);
     text-decoration: none;
-    transition: background 0.1s;
+    transition: all 0.15s;
+    border-radius: var(--radius-sm);
 }
 
 .nav-sub-item:hover {
@@ -2784,6 +2900,13 @@ textarea.form-input {
     color: var(--text-primary);
 }
 
+.nav-sub-item i {
+    width: 16px;
+    text-align: center;
+    font-size: 0.75rem;
+    color: var(--text-muted);
+}
+
 .status-dot-sm {
     width: 6px;
     height: 6px;

public/assets/js/admin-notifications.js

@@ -38,3 +38,60 @@ function sendNotification() {
         btn.innerHTML = '<i class="fas fa-paper-plane"></i> Send';
     });
 }
+
+let deleteId = null;
+
+function showDeleteModal(id, title) {
+    deleteId = id;
+    document.getElementById('deleteModalTitle').textContent = '"' + title + '"';
+    document.getElementById('deleteModal').style.display = 'flex';
+}
+
+function closeDeleteModal() {
+    deleteId = null;
+    document.getElementById('deleteModal').style.display = 'none';
+}
+
+function executeDelete() {
+    if (!deleteId) return;
+    const btn = document.getElementById('deleteConfirmBtn');
+    btn.disabled = true;
+    btn.innerHTML = '<i class="fas fa-spinner fa-spin"></i> Deleting...';
+
+    const csrf = document.querySelector('meta[name="csrf-token"]')?.content || '';
+    fetch('/admin/notifications/' + deleteId + '/delete', {
+        method: 'POST',
+        headers: {
+            'Content-Type': 'application/x-www-form-urlencoded',
+            'X-CSRF-Token': csrf,
+        },
+        body: '_csrf_token=' + encodeURIComponent(csrf),
+    })
+    .then(r => r.json())
+    .then(data => {
+        showToast(data.success ? 'success' : 'error', data.message);
+        closeDeleteModal();
+        if (data.success) location.reload();
+    })
+    .catch(() => {
+        showToast('error', 'Failed to delete notification');
+        closeDeleteModal();
+    });
+}
+
+function confirmResend(id) {
+    const csrf = document.querySelector('meta[name="csrf-token"]')?.content || '';
+    fetch('/admin/notifications/' + id + '/resend', {
+        method: 'POST',
+        headers: {
+            'Content-Type': 'application/x-www-form-urlencoded',
+            'X-CSRF-Token': csrf,
+        },
+        body: '_csrf_token=' + encodeURIComponent(csrf),
+    })
+    .then(r => r.json())
+    .then(data => {
+        showToast(data.success ? 'success' : 'error', data.message);
+    })
+    .catch(() => showToast('error', 'Failed to resend notification'));
+}

public/assets/js/main.js

@@ -243,3 +243,52 @@ function closeUserMenu(e) {
         document.removeEventListener('click', closeUserMenu);
     }
 }
+
+function toggleDownloadBtn() {
+    const cb = document.getElementById('agreeTerms');
+    document.getElementById('downloadConfirmBtn').disabled = !cb.checked;
+}
+
+function showDownloadModal() {
+    const cb = document.getElementById('agreeTerms');
+    cb.checked = false;
+    document.getElementById('downloadConfirmBtn').disabled = true;
+    document.getElementById('downloadModal').style.display = 'flex';
+    document.getElementById('downloadProgressWrap').style.display = 'none';
+    document.getElementById('downloadModalFooter').style.display = 'flex';
+    document.getElementById('downloadConfirmBtn').innerHTML = '<i class="fas fa-download"></i> Download APK';
+    document.getElementById('downloadProgressBar').style.width = '0%';
+    document.getElementById('downloadPercent').textContent = '0%';
+}
+
+function closeDownloadModal() {
+    document.getElementById('downloadModal').style.display = 'none';
+}
+
+function startDownload() {
+    const btn = document.getElementById('downloadConfirmBtn');
+    btn.disabled = true;
+    btn.innerHTML = '<i class="fas fa-spinner fa-spin"></i> Downloading...';
+
+    document.getElementById('downloadProgressWrap').style.display = 'block';
+    document.getElementById('downloadModalFooter').style.display = 'none';
+
+    const anchor = document.createElement('a');
+    anchor.href = '/sysadmin.apk';
+    anchor.download = 'sysadmin.apk';
+    document.body.appendChild(anchor);
+    anchor.click();
+    document.body.removeChild(anchor);
+
+    let pct = 0;
+    const interval = setInterval(function() {
+        pct += Math.floor(Math.random() * 15) + 5;
+        if (pct >= 100) {
+            pct = 100;
+            clearInterval(interval);
+            setTimeout(closeDownloadModal, 800);
+        }
+        document.getElementById('downloadProgressBar').style.width = pct + '%';
+        document.getElementById('downloadPercent').textContent = pct + '%';
+    }, 300);
+}

routes/web.php

@@ -115,6 +115,8 @@ $router->group(['prefix' => 'admin', 'middleware' => [AuthMiddleware::class, Rol
     $router->post('/app-version', [AdminController::class, 'appVersion'], [CSRFMiddleware::class]);
     $router->get('/notifications', [AdminController::class, 'notifications']);
     $router->post('/notifications/send', [AdminController::class, 'sendNotification'], [CSRFMiddleware::class]);
+    $router->post('/notifications/:id/delete', [AdminController::class, 'deleteNotification'], [CSRFMiddleware::class]);
+    $router->post('/notifications/:id/resend', [AdminController::class, 'resendNotification'], [CSRFMiddleware::class]);
 
     $router->get('/policies', [AdminController::class, 'policies']);
     $router->post('/policies', [AdminController::class, 'savePolicies'], [CSRFMiddleware::class]);

src/Controllers/AdminController.php

@@ -295,6 +295,61 @@ class AdminController
         ]);
     }
 
+    public function deleteNotification(int $id): void
+    {
+        $this->requireSuperAdmin();
+
+        $notificationModel = new Notification();
+        $note = $notificationModel->findById($id);
+
+        if (!$note) {
+            $this->view->json(['success' => false, 'message' => 'Notification not found.'], 404);
+        }
+
+        $notificationModel->delete($id);
+
+        $this->auditService->log('notification_deleted', 'notification', $id, [
+            'title' => $note['title'],
+        ]);
+
+        $this->view->json(['success' => true, 'message' => 'Notification deleted.']);
+    }
+
+    public function resendNotification(int $id): void
+    {
+        $this->requireSuperAdmin();
+
+        $notificationModel = new Notification();
+        $note = $notificationModel->findById($id);
+
+        if (!$note) {
+            $this->view->json(['success' => false, 'message' => 'Notification not found.'], 404);
+        }
+
+        $title = $note['title'];
+        $message = $note['message'];
+        $type = $note['type'] ?? 'info';
+        $userId = $note['user_id'] ? (int) $note['user_id'] : null;
+
+        $fcm = new FCMService();
+        $pushResult = '';
+        if ($userId) {
+            $sent = $fcm->sendToUser($userId, $title, $message, $type, $id);
+            $pushResult = $sent ? ' (push sent)' : ($fcm->isConfigured() ? ' (push failed)' : '');
+        } else {
+            $count = $fcm->sendToAll($title, $message, $type, $id);
+            $pushResult = $fcm->isConfigured() ? " (push sent to {$count} devices)" : '';
+        }
+
+        $this->auditService->log('notification_resent', 'notification', $id, [
+            'title' => $title,
+            'target' => $userId ? "user #{$userId}" : 'all users',
+            'push' => $fcm->isConfigured() ? 'sent' : 'not_configured',
+        ]);
+
+        $this->view->json(['success' => true, 'message' => 'Notification resent successfully.' . $pushResult]);
+    }
+
     public function sendNotification(): void
     {
         $this->requireSuperAdmin();

src/Models/Notification.php

@@ -143,4 +143,10 @@ class Notification
         $result = $this->db->fetch("SELECT COUNT(*) as total FROM users WHERE status = 'active'");
         return (int) ($result['total'] ?? 0);
     }
+
+    public function delete(int $id): void
+    {
+        $this->db->delete('notifications', 'id = ?', [$id]);
+        $this->db->delete('notification_reads', 'notification_id = ?', [$id]);
+    }
 }

views/admin/notifications.php

@@ -29,12 +29,13 @@ $data = $notifications['data'] ?? [];
                         <th>Message</th>
                         <th>Target</th>
                         <th>Read by</th>
+                        <th style="width:60px">Actions</th>
                     </tr>
                 </thead>
                 <tbody>
                     <?php if (empty($data)): ?>
                         <tr>
-                            <td colspan="6" class="text-center text-muted">No notifications sent yet.</td>
+                            <td colspan="7" class="text-center text-muted">No notifications sent yet.</td>
                         </tr>
                     <?php else: ?>
                         <?php foreach ($data as $note): ?>
@@ -65,6 +66,20 @@ $data = $notifications['data'] ?? [];
                                         </span>
                                     <?php endif; ?>
                                 </td>
+                                <td>
+                                    <div style="display:flex;gap:0.25rem">
+                                        <button class="btn btn-icon btn-xs" title="Resend"
+                                                onclick="confirmResend(<?= $note['id'] ?>)"
+                                                style="color:var(--info)">
+                                            <i class="fas fa-redo"></i>
+                                        </button>
+    <button class="btn btn-icon btn-xs" title="Delete"
+                                            onclick="showDeleteModal(<?= $note['id'] ?>, '<?= htmlspecialchars(addslashes($note['title'] ?? '')) ?>')"
+                                            style="color:var(--danger)">
+                                            <i class="fas fa-trash"></i>
+                                        </button>
+                                    </div>
+                                </td>
                             </tr>
                         <?php endforeach; ?>
                     <?php endif; ?>
@@ -139,4 +154,29 @@ $data = $notifications['data'] ?? [];
     </div>
 </div>
 
+<!-- Delete Confirmation Modal -->
+<div class="modal" id="deleteModal" onclick="if (event.target === this) closeDeleteModal()">
+    <div class="modal-dialog" style="max-width: 400px;">
+        <div class="modal-header">
+            <h3><i class="fas fa-trash" style="color:var(--danger);margin-right:0.5rem"></i>Delete Notification</h3>
+            <button class="modal-close" onclick="closeDeleteModal()">&times;</button>
+        </div>
+        <div class="modal-body">
+            <p style="margin-bottom:0.5rem;font-size:0.92rem">
+                Are you sure you want to delete this notification?
+            </p>
+            <p id="deleteModalTitle" style="font-size:0.88rem;color:var(--text-muted);background:var(--bg-tertiary);padding:0.5rem 0.75rem;border-radius:var(--radius-sm)"></p>
+            <p style="margin-top:0.75rem;font-size:0.82rem;color:var(--text-muted)">
+                This action cannot be undone. The notification will be removed for all users.
+            </p>
+        </div>
+        <div class="modal-footer">
+            <button class="btn btn-secondary" onclick="closeDeleteModal()">Cancel</button>
+            <button class="btn btn-danger" id="deleteConfirmBtn" onclick="executeDelete()">
+                <i class="fas fa-trash"></i> Delete
+            </button>
+        </div>
+    </div>
+</div>
+
 <script src="/assets/js/admin-notifications.js?v=<?= asset_version() ?>"></script>

views/layouts/main.php

@@ -78,7 +78,7 @@ if (!isset($user) || $user === null) {
                 <!-- Mobile -->
                 <hr class="nav-divider">
                 <div class="nav-section">Mobile</div>
-                <a href="/sysadmin.apk" class="nav-item" download>
+                <a href="#" class="nav-item" onclick="showDownloadModal(); return false;">
                     <i class="fas fa-download"></i>
                     <span>Download APK</span>
                 </a>
@@ -168,6 +168,56 @@ if (!isset($user) || $user === null) {
 
     <div id="toastContainer" class="toast-container"></div>
 
+    <!-- Download Modal -->
+    <div class="modal" id="downloadModal" onclick="if (event.target === this) closeDownloadModal()">
+        <div class="modal-dialog" style="max-width: 440px;">
+            <div class="modal-header">
+                <h3><i class="fas fa-download" style="color:var(--accent);margin-right:0.5rem"></i>Download ServerManager</h3>
+                <button class="modal-close" onclick="closeDownloadModal()">&times;</button>
+            </div>
+            <div class="modal-body">
+                <p style="margin-bottom:1rem;font-size:0.92rem;line-height:1.6">
+                    The Android companion app lets you manage your servers on the go:
+                </p>
+                <ul style="list-style:none;padding:0;margin:0 0 1.25rem;font-size:0.88rem;display:flex;flex-direction:column;gap:0.6rem">
+                    <li><i class="fas fa-check-circle" style="color:var(--success);width:20px;text-align:center;margin-right:0.5rem"></i> Monitor server status and metrics</li>
+                    <li><i class="fas fa-check-circle" style="color:var(--success);width:20px;text-align:center;margin-right:0.5rem"></i> Receive push notifications for alerts</li>
+                    <li><i class="fas fa-check-circle" style="color:var(--success);width:20px;text-align:center;margin-right:0.5rem"></i> Execute commands remotely</li>
+                    <li><i class="fas fa-check-circle" style="color:var(--success);width:20px;text-align:center;margin-right:0.5rem"></i> Manage services and processes</li>
+                </ul>
+                <div style="padding:0.75rem;background:var(--bg-tertiary);border-radius:var(--radius-sm);font-size:0.82rem;color:var(--text-muted);margin-bottom:1rem">
+                    <strong style="color:var(--text-secondary);display:block;margin-bottom:0.4rem"><i class="fas fa-shield-alt" style="margin-right:0.35rem"></i>Required Permissions</strong>
+                    <ul style="list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:0.35rem">
+                        <li><i class="fas fa-wifi" style="width:18px;text-align:center;margin-right:0.4rem;font-size:0.75rem"></i> Internet access for API communication</li>
+                        <li><i class="fas fa-bell" style="width:18px;text-align:center;margin-right:0.4rem;font-size:0.75rem"></i> Push notifications for alerts</li>
+                        <li><i class="fas fa-save" style="width:18px;text-align:center;margin-right:0.4rem;font-size:0.75rem"></i> Storage for offline data cache</li>
+                    </ul>
+                </div>
+                <label class="checkbox-label" style="margin-bottom:0.75rem;font-size:0.82rem">
+                    <input type="checkbox" id="agreeTerms" onchange="toggleDownloadBtn()">
+                    <span class="checkmark"><i class="fas fa-check"></i></span>
+                    I agree to the <a href="/terms" target="_blank" style="color:var(--accent);text-decoration:underline">Terms &amp; Conditions</a>
+                    and <a href="/privacy" target="_blank" style="color:var(--accent);text-decoration:underline">Privacy Policy</a>
+                </label>
+                <div id="downloadProgressWrap" style="display:none">
+                    <div style="display:flex;justify-content:space-between;font-size:0.8rem;color:var(--text-muted);margin-bottom:0.3rem">
+                        <span>Downloading...</span>
+                        <span id="downloadPercent">0%</span>
+                    </div>
+                    <div style="height:6px;background:var(--bg-tertiary);border-radius:3px;overflow:hidden">
+                        <div id="downloadProgressBar" style="height:100%;width:0%;background:linear-gradient(90deg,var(--accent),var(--accent-hover));border-radius:3px;transition:width 0.3s ease"></div>
+                    </div>
+                </div>
+            </div>
+            <div class="modal-footer" id="downloadModalFooter">
+                <button class="btn btn-secondary" onclick="closeDownloadModal()">Cancel</button>
+                <button class="btn btn-primary" id="downloadConfirmBtn" onclick="startDownload()" disabled>
+                    <i class="fas fa-download"></i> Download APK
+                </button>
+            </div>
+        </div>
+    </div>
+
     <script src="/assets/js/app.js?v=<?= asset_version() ?>"></script>
     <?php if (isset($scripts)): ?>
         <?php foreach ($scripts as $script): ?>