feat: squircle corners#2
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Add CSS corner-shape: squircle (continuous-curvature corners) on top of the existing border-radius for demodeck's finite-radius surfaces: control panel, ghlink, option group + buttons, select, live console, code snippet box, copy button, header edit button, popover card, hex input, and text input. Driven by a single inherited --corner token so corner-shape stays consistent and disappears cleanly where it shouldn't apply. Pills (badge, toggle, range track) and circles (color dots, toggle knob, scrollbar) are left untouched. Progressive enhancement only: corner-shape is Chromium-only as of mid-2026; Safari/WebKit and Firefox ignore it and keep the plain border-radius arc, so there is zero visual regression. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
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What
Adds continuous-curvature (squircle) corners to demodeck's dark control-panel surfaces via CSS
corner-shape: squircle, layered on top of the existingborder-radiusvalues.A single inherited custom property drives it:
Applied to the finite-radius surfaces:
.control-panel,.dd-ghlink,.option-group,.option-btn,.dd-select,.live-console,.code-snippet-box,.copy-btn,.header-edit-btn,.popover-card,.hex-text-input,.text-input.Left untouched (intentionally round): pills (
.dd-badge,.toggle-container, range track,.slider-toggle) and circles (.color-btn,.color-picker-label, toggle knob, terminal dots, scrollbar thumb).Caveat — zero visual regression
corner-shapeis Chromium-only as of mid-2026. Safari/WebKit and Firefox ignore it and keep the plainborder-radiusarc, andcorner-shaperequires a non-zeroborder-radiusto take effect, soborder-radiusstill both sizes the corner and serves as the graceful fallback. This is pure progressive enhancement.Mirrors the squircle standard already shipped in CVERInc/cver.net and liquidframe.