Eunchurn Park 93226c9fbb
Fix file browser navigation for non-ASCII folder names (#178)
## Summary

* **What is the goal of this PR?**

Fix file browser failing to navigate into subdirectories with non-ASCII
(Korean/Unicode) folder names.

* **What changes are included?**

- Enable UTF-8 long file names in SdFat (`USE_UTF8_LONG_NAMES=1`)
- Add directory validation before iterating files
- Add `rewindDirectory()` call for stability

## Additional Context
2025-12-31 09:08:31 +11:00
..
2025-12-30 22:06:57 +11:00
2025-12-30 16:09:30 +11:00