Manual Search for tags

### 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:

Hi Dev,

I have multiple number of tags in my kdbx. Is it possible to search for tags manually? like we do in KeepassXC eg. *tag:bank

Multiple number tags makes it difficult for me to scroll horizontally through tags slowly and select manually. In my case I think it would be fast, if I can search tags.

### Describe the solution you'd like:

In search, when I select tags, then I can select tags or I can type them manually to show desired entries.

### Describe alternatives you've considered:

_No response_

### Additional context:

_No response_

The request concerns the search UI's tag-selection flow; start by locating the screen or entry point that handles selecting tags and review the existing search behavior. Done means users can type a tag while searching, alongside selecting tags, and matching entries are shown; run any relevant search tests if present.

Written by the indexing model from the issue text.