refactor(clients): support multiple clients in tab/screen rendering infra #770
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This PR doesn't make any functional changes, but rather prepares the ground to support multiple users.
Main changes:
Render
messages to pass around anOption<Output>
instead of anOption<String>
(theOutput
is a struct that holds aHashMap<ClientId, String>
- right now its values are always identical)Render
instruction sending fromTab
toScreen
(to support clients being on different tabs in the future)connected_clients
attribute to tabs which they use for rendering and figuring out various conditionals.