Add harness workflow and Material showcase design system

apps/docs/.storybook/preview.ts

@@ -1,12 +1,7 @@
 import "../src/preview.css";
 
 import type { Preview } from "@storybook/react";
-import {
-  defaultSkin,
-  setSkin,
-  skinDetails,
-  skinNames
-} from "@ai-ui/ui";
+import { defaultSkin, setSkin } from "@ai-ui/ui";
 import {
   defaultMotionMode,
   defaultTheme,
@@ -21,7 +16,7 @@ import {
 const preview: Preview = {
   globalTypes: {
     theme: {
-      description: "Preview theme",
+      description: "Preview dynamic seed preset",
       toolbar: {
         icon: "paintbrush",
         dynamicTitle: true,
@@ -32,7 +27,7 @@ const preview: Preview = {
       }
     },
     motionMode: {
-      description: "Preview motion mode",
+      description: "Preview motion baseline",
       toolbar: {
         icon: "contrast",
         dynamicTitle: true,
@@ -41,22 +36,10 @@ const preview: Preview = {
           title: motionModeDetails[modeName].label
         }))
       }
-    },
-    skin: {
-      description: "Preview component skin",
-      toolbar: {
-        icon: "mirror",
-        dynamicTitle: true,
-        items: skinNames.map((skinName) => ({
-          value: skinName,
-          title: skinDetails[skinName].label
-        }))
-      }
     }
   },
   initialGlobals: {
     motionMode: defaultMotionMode,
-    skin: defaultSkin,
     theme: defaultTheme
   },
   parameters: {
@@ -82,11 +65,11 @@ const preview: Preview = {
       if (typeof document !== "undefined") {
         setTheme(context.globals.theme ?? defaultTheme);
         setMotionMode(context.globals.motionMode ?? defaultMotionMode);
-        setSkin(context.globals.skin ?? defaultSkin);
+        setSkin(defaultSkin);
 
         document.body.dataset.theme = context.globals.theme ?? defaultTheme;
         document.body.dataset.motion = context.globals.motionMode ?? defaultMotionMode;
-        document.body.dataset.skin = context.globals.skin ?? defaultSkin;
+        document.body.dataset.skin = defaultSkin;
       }
 
       return Story();