feat: drive the host screen with the arrow keys - #13
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With auto-advance off the host walks the game forward by hand, usually from the back of the room with a clicker. Right advances the game; left steps back through the screens the room has already seen, held on the projector only. The game never rewinds: players' phones and the scores are untouched, and the game controls are hidden while the host looks back so a click cannot advance a game that is not on screen.
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Problem
With auto-advance off the host has to walk back to the laptop and click a button for every beat of the game, and there is no way to put a screen the room already saw back on the projector.
Solution
Arrow keys drive the host screen (only while auto-advance is off):
While looking back, a banner says so and the game controls are hidden, so a click cannot advance a game that is not on screen. Any live event, or a resync, drops the host back to the live screen.
Tested end to end on quizzly.localhost with a host and a player: forward through both questions to the podium, back through every remembered screen, return to live, and the bounds at both ends.