Search UI should not search if the Search Index is broken/corrupted

### Your use case

#### What would you like to do?

Notice faster that the search I am currently attempting will not work because the index is broken.

#### Why would you like to do it?

To not waste time searching for something, finding no result, thinking there is no result in the current room and then search some more in another room before thinking of checking the status of the index.

#### How would you like to achieve it?

The search UI should not let the user enter search terms when a search can't be conducted, and should show an error that the search can't be conducted instead. The user can then check the settings for more info.

### Have you considered any alternatives?

_No response_

### Additional context

_No response_