fixup! Enh: Improve smart replies prompt

Signed-off-by: Hamza Mahjoubi <[email protected]>

lib/Service/AiIntegrations/AiIntegrationsService.php

@@ -222,7 +222,7 @@ public function getSmartReply(Account $account, Mailbox $mailbox, Message $messa
 				$this->cache->addValue('smartReplies_'.$message->getId(), $replies);
 				return $decoded;
 			} catch (JsonException $e) {
-				return null;
+				throw new ServiceException('Failed to decode smart replies JSON output', $e);
 			}
 		} else {
 			throw new ServiceException('No language model available for smart replies');