Fix
Tablet and mobile prototype previews render again
Single-document prototypes — especially on tablet and mobile — were showing an empty screen with only the nav. They now render their screens correctly, and the New Prototype / New Proposal config panels load fully styled on first open.
If you opened a prototype on tablet or mobile, the preview could come up blank — just the top nav or bottom tab bar, with nothing inside the screen. The prototype itself was fine; the preview frame just wasn't allowed to run the small bit of script that reveals each screen, so everything stayed hidden.
Now prototype previews render their screens on every device, switch correctly when you pick a screen or click through, and the preview comes up showing the entry screen even before anything loads — no more empty frames.
We also fixed a styling glitch where opening New Prototype or New Proposal straight from a refresh or a direct link showed an unstyled "Configure / Preview" panel until you visited another page first. The panels now load fully styled on the first paint, wherever you land.