Add designlang public-shell pack; tighten auth capture checks

Ran authenticated extract against coulomb.social; session metadata
matched anonymous Bubble defaults, so treat docs/design-extract as a
public shell baseline (PROVENANCE.md). Capture script now refuses to
overwrite storage-state.json with thin anonymous sessions.

docs/design-extract/tokens/theme.js

@@ -0,0 +1,147 @@
+// React Theme — extracted from https://coulomb.social
+// Compatible with: Chakra UI, Stitches, Vanilla Extract, or any CSS-in-JS
+
+/**
+ * TypeScript type definition for this theme:
+ *
+ * interface Theme {
+ *   colors: {
+    primary: string;
+    background: string;
+    foreground: string;
+    neutral50: string;
+    neutral100: string;
+    neutral200: string;
+    neutral300: string;
+    neutral400: string;
+ *   };
+ *   fonts: {
+    body: string;
+ *   };
+ *   fontSizes: {
+    '8': string;
+    '12': string;
+    '14': string;
+    '16': string;
+    '18': string;
+    '32': string;
+    '48': string;
+    '13.3333': string;
+ *   };
+ *   space: {
+    '2': string;
+    '32': string;
+    '68': string;
+ *   };
+ *   radii: {
+    sm: string;
+    md: string;
+ *   };
+ *   shadows: {
+    md: string;
+ *   };
+ *   states: {
+ *     hover: { opacity: number };
+ *     focus: { opacity: number };
+ *     active: { opacity: number };
+ *     disabled: { opacity: number };
+ *   };
+ * }
+ */
+
+export const theme = {
+  "colors": {
+    "primary": "#d08728",
+    "background": "#ffffff",
+    "foreground": "#000000",
+    "neutral50": "#000000",
+    "neutral100": "#171717",
+    "neutral200": "#ffffff",
+    "neutral300": "#616161",
+    "neutral400": "#e5e5e5"
+  },
+  "fonts": {
+    "body": "'Arial', sans-serif"
+  },
+  "fontSizes": {
+    "8": "8px",
+    "12": "12px",
+    "14": "14px",
+    "16": "16px",
+    "18": "18px",
+    "32": "32px",
+    "48": "48px",
+    "13.3333": "13.3333px"
+  },
+  "space": {
+    "2": "2px",
+    "32": "32px",
+    "68": "68px"
+  },
+  "radii": {
+    "sm": "4px",
+    "md": "8px"
+  },
+  "shadows": {
+    "md": "rgb(97, 97, 97) 2px 2px 8px 0px"
+  },
+  "states": {
+    "hover": {
+      "opacity": 0.08
+    },
+    "focus": {
+      "opacity": 0.12
+    },
+    "active": {
+      "opacity": 0.16
+    },
+    "disabled": {
+      "opacity": 0.38
+    }
+  }
+};
+
+// MUI v5 theme
+export const muiTheme = {
+  "palette": {
+    "primary": {
+      "main": "#d08728",
+      "light": "hsl(34, 68%, 64%)",
+      "dark": "hsl(34, 68%, 34%)"
+    },
+    "background": {
+      "default": "#ffffff",
+      "paper": "#616161"
+    },
+    "text": {
+      "primary": "#000000",
+      "secondary": "#ffffff"
+    }
+  },
+  "typography": {
+    "fontFamily": "'Times New Roman', sans-serif",
+    "h1": {
+      "fontSize": "32px",
+      "fontWeight": "600",
+      "lineHeight": "44.8px"
+    },
+    "body1": {
+      "fontSize": "16px",
+      "fontWeight": "400",
+      "lineHeight": "normal"
+    },
+    "body2": {
+      "fontSize": "13.3333px",
+      "fontWeight": "400",
+      "lineHeight": "normal"
+    }
+  },
+  "shape": {
+    "borderRadius": 8
+  },
+  "shadows": [
+    "rgb(97, 97, 97) 2px 2px 8px 0px"
+  ]
+};
+
+export default theme;