Homestyx hydra

R1:85f51c54303f

Fix PHP 8.1 "str_replace(null)" exception in DivinerAtomRef

Summary:
Passing null instead of a string or array to `str_replace()` deprecated since PHP 8.1.

Thus do not create a title array with a `null` entry in `DivinerFindController` when there is no `$query_text`, later to be read via `$this->titles` in `DivinerAtomRef`.

```
ERROR 8192: str_replace(): Passing null to parameter #3 ($subject) of type array|string is deprecated at [/var/www/html/phorge/phorge/src/applications/diviner/atom/DivinerAtomRef.
Repository: R1 hydra
Commit Date: Sep 17 2024