Add review step template for one page checkout module

- Introduced a new template file 'review copy.tpl' for the order summary step in the one page checkout process.
- The template includes a loading indicator and a header for the order summary section.
- Conditional rendering based on customer registration status is implemented.

.serena/memories/suggested_commands.md

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+# Suggested Commands
+
+## System Commands (Windows with Git Bash)
+- `git` - Version control
+- `ls` / `dir` - List files
+- `cd` - Change directory
+- `grep` / `findstr` - Search in files
+- `find` (Git Bash) - Find files
+- `cat` - View file contents
+
+## PrestaShop CLI
+- `php bin/console` - Symfony console (PrestaShop 1.7+)
+- `php bin/console cache:clear` - Clear Symfony cache
+- `php bin/console debug:router` - List routes
+
+## Cache Management
+- Clear PrestaShop cache: Delete contents of `var/cache/` (prod & dev)
+- In admin panel: Advanced Parameters > Performance > Clear cache
+
+## Development
+- No composer.json in repo root (PrestaShop modules may have their own)
+- No automated tests configured in this project
+- No linter/formatter configured
+- FTP sync configured via `.vscode/ftp-kr.json` (deploy via FTP)
+
+## Deployment
+- Code is deployed via FTP (VS Code ftp-kr extension)
+- No CI/CD pipeline configured
+
+## Custom Scripts
+- `php import-products.php?add=true` - Import new products from Sollux XML
+- `php import-products.php?update=true` - Update existing products
+- `php export.php` - Export products
+- `php custom-cron.php` - Run custom cron tasks