Fix syntax error in main-installer.sh

Fixed a syntax error in the update script setup section of main-installer.sh:
- Fixed incorrect brace closure (using '}' instead of 'fi')
- Fixed indentation for better code readability
- Ensured proper nesting of if conditions
- This should resolve the error during installation when copying module files

💡 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>

main-installer.sh

@@ -499,7 +499,7 @@ EOL
     chmod +x "${SCRIPT_DIR}/scripts/update.sh"
     log "INFO" "Created update script: ${SCRIPT_DIR}/scripts/update.sh"
   fi
-}
+fi
 
 # Step 8: Final setup and permissions
 log "INFO" "Finalizing setup..."