fix: clean up tsconfig.json and remove Playwright references

- Remove @playwright/test from types array since Playwright was removed
- Update test documentation to use Jest-based tools instead
- Verify TypeScript compilation still works correctly
- Maintains working Jest types for existing tests

tests/FINAL_IMPROVEMENT_SUMMARY.md

@@ -244,8 +244,8 @@ test('medication card handles user interactions', () => {
 1. **Visual Regression Testing**
 
    ```bash
-   npm install --save-dev @playwright/test
-   # Add screenshot comparison tests
+   npm install --save-dev jest-image-snapshot
+   # Add screenshot comparison tests with Jest
    ```
 
 2. **Performance Testing**