feat(web): port mosaic-stack design system — ms-* tokens, ThemeProvider, MosaicLogo, sidebar

apps/web/src/components/ui/mosaic-logo.tsx

@@ -0,0 +1,89 @@
+'use client';
+
+import type { CSSProperties } from 'react';
+
+export interface MosaicLogoProps {
+  size?: number;
+  spinning?: boolean;
+  spinDuration?: number;
+  className?: string;
+}
+
+export function MosaicLogo({
+  size = 36,
+  spinning = false,
+  spinDuration = 20,
+  className = '',
+}: MosaicLogoProps): React.JSX.Element {
+  const scale = size / 36;
+  const squareSize = Math.round(14 * scale);
+  const circleSize = Math.round(11 * scale);
+  const borderRadius = Math.round(3 * scale);
+
+  const animationValue = spinning
+    ? `mosaicLogoSpin ${String(spinDuration)}s linear infinite`
+    : undefined;
+
+  const containerStyle: CSSProperties = {
+    width: size,
+    height: size,
+    position: 'relative',
+    flexShrink: 0,
+    animation: animationValue,
+    transformOrigin: 'center',
+  };
+
+  const baseSquareStyle: CSSProperties = {
+    position: 'absolute',
+    width: squareSize,
+    height: squareSize,
+    borderRadius,
+  };
+
+  const circleStyle: CSSProperties = {
+    position: 'absolute',
+    top: '50%',
+    left: '50%',
+    transform: 'translate(-50%, -50%)',
+    width: circleSize,
+    height: circleSize,
+    borderRadius: '50%',
+    background: 'var(--ms-pink-500)',
+  };
+
+  return (
+    <>
+      {spinning ? (
+        <style>{`
+          @keyframes mosaicLogoSpin {
+            from { transform: rotate(0deg); }
+            to { transform: rotate(360deg); }
+          }
+        `}</style>
+      ) : null}
+      <div style={containerStyle} className={className} role="img" aria-label="Mosaic logo">
+        <div style={{ ...baseSquareStyle, top: 0, left: 0, background: 'var(--ms-blue-500)' }} />
+        <div style={{ ...baseSquareStyle, top: 0, right: 0, background: 'var(--ms-purple-500)' }} />
+        <div
+          style={{
+            ...baseSquareStyle,
+            bottom: 0,
+            right: 0,
+            background: 'var(--ms-teal-500)',
+          }}
+        />
+        <div
+          style={{
+            ...baseSquareStyle,
+            bottom: 0,
+            left: 0,
+            background: 'var(--ms-amber-500)',
+          }}
+        />
+        <div style={circleStyle} />
+      </div>
+    </>
+  );
+}
+
+export default MosaicLogo;