feat: add in-app notifications system with bell icon, polling, and notifications page

docs/pow-server/btcpay-webhook.php

@@ -109,4 +109,32 @@ if ($directusStatus >= 400) {
     exit;
 }
 
+// Create notification for listing owner
+$listingData = json_decode($directusResponse, true);
+$userCreated = $listingData['data']['user_created'] ?? null;
+
+if ($userCreated) {
+    $notifPayload = json_encode([
+        'user_hash' => $userCreated,
+        'type' => 'listing_published',
+        'reference_id' => $listingId,
+        'read' => false,
+    ]);
+
+    $notifUrl = DIRECTUS_URL . '/items/notifications';
+    $nch = curl_init($notifUrl);
+    curl_setopt_array($nch, [
+        CURLOPT_POST => true,
+        CURLOPT_POSTFIELDS => $notifPayload,
+        CURLOPT_HTTPHEADER => [
+            'Content-Type: application/json',
+            'Authorization: Bearer ' . DIRECTUS_TOKEN,
+        ],
+        CURLOPT_RETURNTRANSFER => true,
+        CURLOPT_TIMEOUT => 5,
+    ]);
+    curl_exec($nch);
+    curl_close($nch);
+}
+
 echo json_encode(['ok' => true, 'listingId' => $listingId, 'action' => 'published']);