Files plugin v34: space-separated query no longer finds underscore-separated filenames

[Pranske]

Environment:

• Linux Mint 22 Cinnamon / Ubuntu 24.04 base
• Albert v34.0.10 Qt6
• Built-in Files plugin

Regression:
In older Albert versions, searching "deimos ultra" matched files named like:
BFT_Deimos_Ultra_BT_B_EN.pdf

In v34.0.10, the same query returns no result. Searching with the underscore form works, but space-separated multi-token search no longer matches underscore-separated filenames.

Reproducer:

1. Create/index a file named:
   BFT_Deimos_Ultra_BT_B_EN.pdf
2. Search:
   deimos ultra
3. Expected:
   File is found.
4. Actual:
   No result.

Probable cause:
v34 changed tokenization to Unicode word boundaries. Under this model, underscores are treated as word/connector characters, not as separators. For file search, this is undesirable because underscores, hyphens, and dots often function as human word separators in filenames.

Requested fix:
Please allow the Files plugin to index normalized lookup aliases, e.g.:

• "_" → " "
• "-" → " "
• "." → " "

or expose a plugin setting such as:
File name separators: "_-. "