"Use, by you or one client, in a single end product which end users are not charged for."
would I need to purchase the $350 license for a commercial product like a SaaS?
That's a ton of work you did on this. Well worth the price.
is the chat app functional, and if so what backend/api does it use? The documentation doesn't mention the apps so I assume they are just front-end html/css?
Who is the target audience here, and what would they be doing that they might be able to put this dashboard to good use?