feat: improve Apprise notification subject/title handling and fallbacks

- lib/Controller/WebhookController.php: Extract subject/title from wrapper level and add fallback to default sender name
- lib/Service/TalkService.php: Update display name logic to check subject, and use title/subject as message body when empty

lib/Controller/WebhookController.php

@@ -233,7 +233,20 @@ class WebhookController extends Controller {
 
         // Apprise API wraps notifications in a "notifications" array
         if (isset($data['notifications']) && is_array($data['notifications']) && !empty($data['notifications'])) {
+            $wrapper = $data;
             $data = $data['notifications'][0];
+            // Some Apprise versions put subject/title at the wrapper level
+            if (empty($data['subject']) && !empty($wrapper['subject'])) {
+                $data['subject'] = $wrapper['subject'];
+            }
+            if (empty($data['title']) && !empty($wrapper['title'])) {
+                $data['title'] = $wrapper['title'];
+            }
+        }
+
+        // Fallback: if no subject/title anywhere, use config default
+        if (empty($data['subject']) && empty($data['title'])) {
+            $data['subject'] = $this->talkService->getSenderNameDefault();
         }
 
         // Map apprise format to our internal payload format

lib/Service/TalkService.php

@@ -587,8 +587,10 @@ class TalkService {
     public function mapApprisePayload(array $data, string $roomToken = ''): array {
         $parts = [];
 
-        // Display name: use Apprise title (source/app name) as the display name
+        // Display name: use Apprise title/subject (source/app name) as the display name
-        $displayName = !empty($data['title']) ? $data['title'] : $this->config->getAppValue(self::APP_ID, 'sender_name', 'Webhook Bot');
+        $displayName = !empty($data['title']) ? $data['title']
+            : (!empty($data['subject']) ? $data['subject']
+            : $this->config->getAppValue(self::APP_ID, 'sender_name', 'Webhook Bot'));
 
         // Body
         if (!empty($data['body'])) {
@@ -658,6 +660,16 @@ class TalkService {
 
         $message = implode("\n\n", $parts);
 
+        // If body is empty but we have a title/subject, use it as the message
+        // (handles test notifications and simple alerts with no body)
+        if ($message === '') {
+            if (!empty($data['title'])) {
+                $message = $data['title'];
+            } elseif (!empty($data['subject'])) {
+                $message = $data['subject'];
+            }
+        }
+
         // Sender name: use app name if available, otherwise default
         $senderName = $displayName;