Fix fuzzy search for Users and Products using dropdown selection #620
Description
The current fuzzy search for Users and Products is unreliable and makes it difficult to select the correct item. We should replace or improve it by using dropdown-based selection with proper search/filter behavior.
- Product selection should use searchable dropdowns
- Results should be accurate and deterministic
- Keyboard navigation should work correctly
- User search reliable and only on the end show new user option
- No duplicated or irrelevant results