Fix JavaScript syntax error in dashboard server

Remove extra closing parenthesis that was causing SyntaxError:
- Change `});` to `}` to properly close getDashboardHTML() function
- This was causing the dashboard API to crash on startup

Fixes: "SyntaxError: Unexpected token ')'" at line 62

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: dawid

dashboard/api/server.js

@@ -59,7 +59,7 @@ function getDashboardHTML() {
       </body>
     </html>
   `;
-});
+}
 
 // Configuration
 const PORT = process.env.DASHBOARD_PORT || 3001;  // Dashboard on 3001, MCP on 3000