[Entry list and search results] Show specific fields

### Checks

- [x] I have read the Wiki, searched the open issues, and still think this is a new feature.

### Explain the problem clearly and succinctly:

I want to scan for a particular field/attribute, without tapping open every list item.

### Describe the solution you'd like:

Decide which fields to show in entry list and search results. For example, currently it shows Title and Username. I want to also show certain other field(s).

### Describe alternatives you've considered:

_No response_

### Additional context:

_No response_

The issue names entry lists and search results as the relevant entry points. Start by inspecting how Title and Username are currently selected and displayed, then clarify which additional fields should be supported. Done means the requested fields are shown consistently in both contexts and the behavior is verified.

Written by the indexing model from the issue text.