Feature Request: support for wildcard search to enable searching by file names and file extensions.

[zscontributor]

Is your feature request related to a problem? Please describe. When I search for file names using Japanese, Korean, or Vietnamese, the file search function does not work correctly. In groups and direct messages, it seems that searching by file name is not functioning at all.

Describe the solution you'd like Please add support for wildcard search to enable searching by file names and file extensions. In particular, the search should support Unicode languages such as Japanese, Korean, and Vietnamese.