chore: storybook (#15285)

Co-authored-by: David Hill <iamdavidhill@gmail.com>

packages/ui/src/components/code.stories.tsx

@@ -0,0 +1,70 @@
+// @ts-nocheck
+import * as mod from "./code"
+import { create } from "../storybook/scaffold"
+import { code } from "../storybook/fixtures"
+
+const docs = `### Overview
+Syntax-highlighted code viewer with selection support and large-file virtualization.
+
+Use alongside \`LineComment\` and \`Diff\` in review workflows.
+
+### API
+- Required: \`file\` with file name + contents.
+- Optional: \`language\`, \`annotations\`, \`selectedLines\`, \`commentedLines\`.
+- Optional callbacks: \`onRendered\`, \`onLineSelectionEnd\`.
+
+### Variants and states
+- Supports large-file virtualization automatically.
+
+### Behavior
+- Re-renders when \`file\` or rendering options change.
+- Optional line selection integrates with selection callbacks.
+
+### Accessibility
+- TODO: confirm keyboard find and selection behavior.
+
+### Theming/tokens
+- Uses \`data-component="code"\` and Pierre CSS variables from \`styleVariables\`.
+
+`
+
+const story = create({
+  title: "UI/Code",
+  mod,
+  args: {
+    file: code,
+    language: "ts",
+  },
+})
+
+export default {
+  title: "UI/Code",
+  id: "components-code",
+  component: story.meta.component,
+  tags: ["autodocs"],
+  parameters: {
+    docs: {
+      description: {
+        component: docs,
+      },
+    },
+  },
+}
+
+export const Basic = story.Basic
+
+export const SelectedLines = {
+  args: {
+    enableLineSelection: true,
+    selectedLines: { start: 2, end: 4 },
+  },
+}
+
+export const CommentedLines = {
+  args: {
+    commentedLines: [
+      { start: 1, end: 1 },
+      { start: 5, end: 6 },
+    ],
+  },
+}