- Add create_job_edit_form() method to programmatically create edit form
- Form uses 'job_edit' key and matches submission form fields exactly
- Configure Update Post action to update existing job_offer posts
- Add validate_job_ownership() method with frm_validate_entry hook
- Security: Validates job_id parameter, post_type, and post_author match
- Prevents URL parameter tampering by malicious providers
- Add get_job_edit_form_id() helper method
- Form pre-populates from post ID via URL parameter
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>