feat: add more integration pages

app/integrations/squarespace/page.tsx

@@ -0,0 +1,52 @@
+'use client'
+
+import { IntegrationGuide } from '@/components/IntegrationGuide'
+import { CodeBlock } from '@/components/CodeBlock'
+import { getIntegration } from '@/lib/integrations'
+import { notFound } from 'next/navigation'
+
+export default function SquarespaceIntegrationPage() {
+  const integration = getIntegration('squarespace')
+  if (!integration) return notFound()
+
+  return (
+    <IntegrationGuide integration={integration}>
+      <p className="lead text-xl text-neutral-600 dark:text-neutral-400">
+        Add Pulse to your Squarespace site using the built-in Code Injection feature &mdash; no plugins needed.
+      </p>
+
+      <hr className="my-8 border-neutral-200 dark:border-neutral-800" />
+
+      <h3>Code Injection (Recommended)</h3>
+      <ol>
+        <li>In your Squarespace dashboard, go to <strong>Settings &gt; Developer Tools &gt; Code Injection</strong>.</li>
+        <li>In the <strong>Header</strong> field, paste the following snippet:</li>
+      </ol>
+
+      <CodeBlock filename="Settings → Code Injection → Header">
+{`<script
+  defer
+  data-domain="your-site.com"
+  src="https://pulse.ciphera.net/script.js"
+></script>`}
+      </CodeBlock>
+
+      <ol start={3}>
+        <li>Click <strong>Save</strong>.</li>
+      </ol>
+
+      <h3>Important Notes</h3>
+      <ul>
+        <li>
+          Code Injection is available on <strong>Squarespace Business</strong> and <strong>Commerce</strong> plans.
+        </li>
+        <li>
+          <strong>data-domain</strong>: Use your custom domain (e.g., <code>example.com</code>) rather than the <code>.squarespace.com</code> subdomain.
+        </li>
+        <li>
+          Pulse is cookie-free, so you do not need to update your Squarespace cookie banner settings.
+        </li>
+      </ul>
+    </IntegrationGuide>
+  )
+}