feat(web): ui/menu Base UI dropdown wrapper + story (#54)

web/src/components/ui/menu.stories.tsx

@@ -0,0 +1,32 @@
+import type { Meta, StoryObj } from '@storybook/react-vite'
+import { expect, within } from 'storybook/test'
+
+import { Menu, MenuContent, MenuItem, MenuSeparator, MenuTrigger } from './menu'
+import { Button } from './button'
+
+const meta = {
+  component: Menu,
+  tags: ['ai-generated'],
+} satisfies Meta<typeof Menu>
+
+export default meta
+type Story = StoryObj<typeof meta>
+
+export const Default: Story = {
+  render: () => (
+    <Menu>
+      <MenuTrigger render={<Button variant="ghost">Open</Button>} />
+      <MenuContent>
+        <MenuItem>First</MenuItem>
+        <MenuSeparator />
+        <MenuItem>Second</MenuItem>
+      </MenuContent>
+    </Menu>
+  ),
+  play: async ({ canvas, userEvent }) => {
+    await userEvent.click(canvas.getByRole('button', { name: 'Open' }))
+    await expect(
+      await within(document.body).findByText('First'),
+    ).toBeInTheDocument()
+  },
+}

web/src/components/ui/menu.tsx

@@ -0,0 +1,67 @@
+import { Menu as MenuPrimitive } from "@base-ui/react/menu"
+
+import { cn } from "@/lib/utils"
+
+function Menu({ ...props }: MenuPrimitive.Root.Props) {
+  return <MenuPrimitive.Root data-slot="menu" {...props} />
+}
+
+function MenuTrigger({ ...props }: MenuPrimitive.Trigger.Props) {
+  return <MenuPrimitive.Trigger data-slot="menu-trigger" {...props} />
+}
+
+function MenuContent({
+  className,
+  sideOffset = 6,
+  align = "end",
+  ...props
+}: MenuPrimitive.Popup.Props & {
+  sideOffset?: MenuPrimitive.Positioner.Props["sideOffset"]
+  align?: MenuPrimitive.Positioner.Props["align"]
+}) {
+  return (
+    <MenuPrimitive.Portal>
+      <MenuPrimitive.Positioner
+        sideOffset={sideOffset}
+        align={align}
+        className="z-50"
+      >
+        <MenuPrimitive.Popup
+          data-slot="menu-content"
+          className={cn(
+            "min-w-44 rounded-md border bg-popover p-1 text-popover-foreground shadow-md outline-none",
+            "data-open:animate-in data-open:fade-in-0 data-closed:animate-out data-closed:fade-out-0",
+            className
+          )}
+          {...props}
+        />
+      </MenuPrimitive.Positioner>
+    </MenuPrimitive.Portal>
+  )
+}
+
+function MenuItem({ className, ...props }: MenuPrimitive.Item.Props) {
+  return (
+    <MenuPrimitive.Item
+      data-slot="menu-item"
+      className={cn(
+        "flex cursor-default items-center gap-2 rounded-sm px-2 py-1.5 text-sm outline-none select-none",
+        "data-[highlighted]:bg-accent data-[highlighted]:text-accent-foreground",
+        className
+      )}
+      {...props}
+    />
+  )
+}
+
+function MenuSeparator({ className, ...props }: MenuPrimitive.Separator.Props) {
+  return (
+    <MenuPrimitive.Separator
+      data-slot="menu-separator"
+      className={cn("-mx-1 my-1 h-px bg-border", className)}
+      {...props}
+    />
+  )
+}
+
+export { Menu, MenuTrigger, MenuContent, MenuItem, MenuSeparator }