File Tagging Breaks: Case-Sensitive File Matching Regression

Question

**Bug Description**
The file tagging with @ is not working properly. Before, it was case-insensitive and worked flawlessly. Now it won't find the file unless you type the filename exactly as it is.

**Environment Info**
- Platform: darwin
- Terminal: WarpTerminal
- Version: 1.0.69
- Feedback ID: 8cfe92eb-8750-45b6-b33c-5085ce1f5dc2

**Errors**
```json
[]
```