Bug Fix
- Drive Sync: encrypted file repeatedly appearing in pull candidates — On case-insensitive filesystems (Windows NTFS, macOS), a file whose path differed only in letter case between Drive and local vault (e.g., Github.md.encrypted vs github.md.encrypted) would endlessly reappear in the "Pull to local" list even after pulling. Added case-insensitive fallback path matching across the sync system to resolve this.