Slack setup now finishes even before the bot joins a channel

Before, the Slack connection process needed the bot to already be part of a channel to finish setting up. That caused delays if the bot wasn’t in any channels yet.

Now, you can complete the Slack integration right from the start. The app will use a default channel (usually #general) so everything saves properly, and you can invite the bot to channels whenever you want after that. It just makes getting started faster and easier.