[SandObserver]

Summary

• Scale the glass widget frame in the phone demo from its own card's client width instead of the neighbouring borderless card, so the 1px border no longer pushes the frame past the padding box.
• Set a dedicated --nps scale on the demo screen and fall back to --ws when it is absent.

Testing
npm run build and npm run check both pass. Verified in Chrome at 393px: the frame's right and bottom edges now sit inside the card, and the card reports no scroll overflow.

Checklist

• npm run build and npm run check both pass.
• Product UI is shown by running or capturing it, never recreated in CSS.
• Any new preview or screenshot carries no private hostnames or real data.
• Visual changes verified in both colour schemes and both docs themes.
• Links to the app repo still resolve.

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