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/task_completion_checklist.md

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+# Task Completion Checklist
+
+When a task is completed, follow these steps:
+
+## 1. Code Quality
+- [ ] Code follows PrestaShop conventions (camelCase, Module class structure)
+- [ ] No hardcoded values where configuration should be used
+- [ ] SQL queries use PrestaShop's `Db` class with proper escaping (`pSQL()`, `(int)`)
+- [ ] Comments in Polish or English (match surrounding code)
+
+## 2. Cache
+- [ ] If overrides were added/changed: remind user to clear PrestaShop cache
+- [ ] If Smarty templates changed: cache clear may be needed
+
+## 3. Deployment
+- [ ] Files ready to be synced via FTP (ftp-kr)
+- [ ] No sensitive data (passwords, API keys) committed
+
+## 4. Git
+- [ ] Changes committed with descriptive message
+- [ ] No unnecessary files staged (.vscode cache files excluded)
+
+## 5. Testing
+- [ ] No automated tests in this project - manual testing required
+- [ ] Remind user to test in browser after FTP sync
+
+## Notes
+- Admin panel folder: `admin658c34/` (obfuscated name)
+- empikmarketplace module can override product list view in BO (see NOTATKI.md)