Fix Crash Issue while using "Dump Media Library"

This MR fixes a crash on repeated media library exports.

The app would crash when using the "Dump Media Library" feature if a dump file from a previous export already existed. This was caused by an incorrect attempt to create a directory at the destination file's path.

This fix corrects the logic by:

• Ensuring the parent Logs directory exists.
• Removing the old dump file before copying the new one.

This makes the export operation robust and prevents the crash.