chore: import upstream snapshot with attribution

apps/sim/app/(landing)/components/share-button/index.ts

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+export { ShareButton } from './share-button'

apps/sim/app/(landing)/components/share-button/share-button.tsx

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+'use client'
+
+import {
+  Chip,
+  DropdownMenu,
+  DropdownMenuContent,
+  DropdownMenuItem,
+  DropdownMenuTrigger,
+  TRIGGER_BORDER_CLASS,
+  useCopyToClipboard,
+} from '@sim/emcn'
+import { Duplicate } from '@sim/emcn/icons'
+import { Share2 } from 'lucide-react'
+import { LinkedInIcon, xIcon as XIcon } from '@/components/icons'
+
+interface ShareButtonProps {
+  url: string
+  title: string
+}
+
+/** Bordered `Chip` trigger with a copy-link / X / LinkedIn share menu — the one Share control used across blog, library, integration, and model pages. */
+export function ShareButton({ url, title }: ShareButtonProps) {
+  const { copied, copy } = useCopyToClipboard({ resetMs: 1500 })
+
+  const handleShareTwitter = () => {
+    const tweetUrl = `https://twitter.com/intent/tweet?url=${encodeURIComponent(url)}&text=${encodeURIComponent(title)}`
+    window.open(tweetUrl, '_blank', 'noopener,noreferrer')
+  }
+
+  const handleShareLinkedIn = () => {
+    const linkedInUrl = `https://www.linkedin.com/sharing/share-offsite/?url=${encodeURIComponent(url)}`
+    window.open(linkedInUrl, '_blank', 'noopener,noreferrer')
+  }
+
+  return (
+    <DropdownMenu>
+      <DropdownMenuTrigger asChild>
+        <Chip leftIcon={Share2} className={TRIGGER_BORDER_CLASS} aria-label='Share this page'>
+          Share
+        </Chip>
+      </DropdownMenuTrigger>
+      <DropdownMenuContent align='end'>
+        <DropdownMenuItem onSelect={() => copy(url)}>
+          <Duplicate className='size-4' />
+          {copied ? 'Copied!' : 'Copy link'}
+        </DropdownMenuItem>
+        <DropdownMenuItem onSelect={handleShareTwitter}>
+          <XIcon className='size-4' />
+          Share on X
+        </DropdownMenuItem>
+        <DropdownMenuItem onSelect={handleShareLinkedIn}>
+          <LinkedInIcon className='size-4' />
+          Share on LinkedIn
+        </DropdownMenuItem>
+      </DropdownMenuContent>
+    </DropdownMenu>
+  )
+}