Add test notification feature for admins

- Added "Send Test Notification to All Users" button in admin panel
- Button appears after enabling push notifications
- Server endpoint /test-notification sends to all subscribed users
- Shows count of successful deliveries
- Purple button to distinguish from other actions
- Useful for testing notification system is working

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

index.html

@@ -907,6 +907,9 @@
                     <button class="action-btn secondary" id="disableNotifications" onclick="disablePushNotifications()" style="display:none;">
                         Disable Notifications
                     </button>
+                    <button class="action-btn" id="testNotification" onclick="sendTestNotification()" style="display:none; margin-top: 10px; background: #9c27b0;">
+                        📨 Send Test Notification to All Users
+                    </button>
                 </div>
             </div>
 
@@ -5562,17 +5565,44 @@
             const statusText = document.getElementById('notificationStatusText');
             const enableBtn = document.getElementById('enableNotifications');
             const disableBtn = document.getElementById('disableNotifications');
+            const testBtn = document.getElementById('testNotification');
 
             if (enabled) {
                 statusText.textContent = 'Enabled';
                 statusText.style.color = '#4CAF50';
                 enableBtn.style.display = 'none';
                 disableBtn.style.display = 'block';
+                testBtn.style.display = 'block';
             } else {
                 statusText.textContent = 'Disabled';
                 statusText.style.color = '#666';
                 enableBtn.style.display = 'block';
                 disableBtn.style.display = 'none';
+                testBtn.style.display = 'none';
+            }
+        }
+
+        async function sendTestNotification() {
+            try {
+                const response = await fetch('/test-notification', {
+                    method: 'POST',
+                    headers: {
+                        'Content-Type': 'application/json'
+                    },
+                    body: JSON.stringify({
+                        message: 'Test notification from HikeMap admin'
+                    })
+                });
+
+                const result = await response.json();
+                if (result.success) {
+                    updateStatus(`Test notification sent to ${result.sent} users!`, 'success');
+                } else {
+                    updateStatus('Failed to send test notification', 'error');
+                }
+            } catch (error) {
+                console.error('Error sending test notification:', error);
+                updateStatus('Error sending test notification', 'error');
             }
         }
 

server.js

@@ -209,6 +209,53 @@ app.post('/unsubscribe', async (req, res) => {
     }
 });
 
+// Send test notification to all users
+app.post('/test-notification', async (req, res) => {
+    try {
+        const { message } = req.body;
+
+        if (!pushSubscriptions.length) {
+            return res.json({ success: false, message: 'No users have notifications enabled' });
+        }
+
+        const payload = {
+            title: '🔔 HikeMap Test Notification',
+            body: message || 'This is a test notification from HikeMap',
+            icon: '/icon-192x192.png',
+            badge: '/icon-72x72.png',
+            vibrate: [200, 100, 200],
+            data: {
+                type: 'test',
+                timestamp: Date.now()
+            }
+        };
+
+        // Send to all subscriptions
+        const results = await Promise.allSettled(
+            pushSubscriptions.map(subscription =>
+                webpush.sendNotification(subscription, JSON.stringify(payload))
+                    .catch(err => {
+                        if (err.statusCode === 410) {
+                            // Subscription expired, remove it
+                            pushSubscriptions = pushSubscriptions.filter(sub =>
+                                sub.endpoint !== subscription.endpoint
+                            );
+                        }
+                        throw err;
+                    })
+            )
+        );
+
+        const successful = results.filter(r => r.status === 'fulfilled').length;
+        console.log(`Test notification sent to ${successful}/${pushSubscriptions.length} subscribers`);
+
+        res.json({ success: true, sent: successful, total: pushSubscriptions.length });
+    } catch (err) {
+        console.error('Error sending test notification:', err);
+        res.status(500).json({ error: 'Failed to send test notification' });
+    }
+});
+
 // Send notification to a specific user
 app.post('/send-notification', async (req, res) => {
     try {