fix: push notification fix

internal/service/notification_service.go

@@ -185,7 +185,7 @@ func (s *NotificationService) SendReminder(ctx context.Context, userID, kind, ti
 
 	// Web Push (reaches closed apps).
 	if s.push != nil {
-		s.push.SendToUser(ctx, userID, PushPayload{Title: title, Body: body, URL: url, Tag: kind, RequireInteraction: true})
+		s.push.SendToUser(ctx, userID, PushPayload{Title: title, Body: body, URL: url, Icon: s.iconURL(), Tag: kind, RequireInteraction: true})
 	}
 
 	// Email (only if there's an address on file).
@@ -239,10 +239,17 @@ func (s *NotificationService) publishPush(ctx context.Context, recipientID, kind
 		Title: title,
 		Body:  body,
 		URL:   url,
+		Icon:  s.iconURL(),
 		Tag:   kind,
 	})
 }
 
+// iconURL is the absolute URL of the notification icon (the app's square
+// icon), so it renders regardless of the client's base path.
+func (s *NotificationService) iconURL() string {
+	return strings.TrimRight(s.frontendURL, "/") + "/icon-192.png"
+}
+
 func (s *NotificationService) render(kind string, recipient, actor *model.User) (string, error) {
 	data := map[string]any{
 		"RecipientName": recipient.Name,