2350cca32c
- Add case-insensitive search across all fields (inhalt, titel, geltungsbereich) - Include Vorgabe.titel field in search scope for better coverage - Implement comprehensive input validation against SQL injection and XSS - Add German error messages for validation failures - Escape search terms in templates to prevent XSS attacks - Add input length limits and character validation - Preserve user input on validation errors for better UX - Add comprehensive test suite with 27 tests covering all functionality - Test security features: XSS prevention, SQL injection protection, input validation - Test edge cases: expired content, multiple documents, German umlauts - Ensure all search fields work correctly with case-insensitive matching