fix: correct typosquatted org name in website install command (#259)

## Summary

- Fix transposed org name `stmg-ai` → `smtg-ai` in the shell install
command on the landing page (`web/src/app/page.tsx:68,70`)
- Both the visible `<code>` element and the `CopyButton` `textToCopy`
prop point to the wrong URL

  ## Context

The curl install command on the website references `stmg-ai` (letters
transposed) instead of the correct `smtg-ai`. The `stmg-ai` GitHub org
does not currently exist, meaning anyone could register it, create a
`claude-squad` repo with a
malicious `install.sh`, and users copying the command from the site
would pipe an attacker-controlled script into bash.

Every other reference in the repository (README.md, install.sh, go.mod,
layout.tsx, etc.) correctly uses `smtg-ai`.

Author: whoamipl

web/src/app/page.tsx

@@ -65,9 +65,9 @@ export default function Home() {
           <h3>Via Shell Script</h3>
           <div className={styles.codeBlockWrapper}>
             <pre className={styles.codeBlock}>
-              <code>curl -fsSL https://raw.githubusercontent.com/stmg-ai/claude-squad/main/install.sh | bash</code>
+              <code>curl -fsSL https://raw.githubusercontent.com/smtg-ai/claude-squad/main/install.sh | bash</code>
             </pre>
-            <CopyButton textToCopy="curl -fsSL https://raw.githubusercontent.com/stmg-ai/claude-squad/main/install.sh | bash" />
+            <CopyButton textToCopy="curl -fsSL https://raw.githubusercontent.com/smtg-ai/claude-squad/main/install.sh | bash" />
           </div>
           <p className={styles.prerequisites}>
             Prerequisites: tmux, gh (GitHub CLI)
@@ -90,4 +90,4 @@ export default function Home() {
       </footer>
     </div>
   );
-}
+}