fix(webhooks): Send full notification object to test endpoint

The /notifications/test endpoint requires the full notification object,
not just the ID. Changed testSonarrWebhook() and testRadarrWebhook() to
send the complete notification object (sonarrSofarr/radarrSofarr).

Fixes: 400 validation error when testing webhooks

public/app.js

@@ -1396,7 +1396,7 @@ async function testSonarrWebhook() {
         'Content-Type': 'application/json',
         'X-CSRF-Token': csrfToken || ''
       },
-      body: JSON.stringify({ id: sonarrSofarr.id })
+      body: JSON.stringify(sonarrSofarr)
     });
     if (!res.ok) throw new Error('Test failed');
     await fetchWebhookStatus();
@@ -1424,7 +1424,7 @@ async function testRadarrWebhook() {
         'Content-Type': 'application/json',
         'X-CSRF-Token': csrfToken || ''
       },
-      body: JSON.stringify({ id: radarrSofarr.id })
+      body: JSON.stringify(radarrSofarr)
     });
     if (!res.ok) throw new Error('Test failed');
     await fetchWebhookStatus();