Set Default Export File Name as Database Name

[yoleichen]

Currently, when exporting data, the default file name is set to "newFile". It would be more user-friendly if the default file name was set to the database name. For example, if the database name is "yoleichen-test-03182025", the default file name should be "yoleichen-test-03182025.".

Benefits:
This change will improve the user experience by providing a more meaningful default file name, allowing users to quickly identify the file they are looking for, and saving them time as they will not have to manually change the file name to a unique name.

cc. @croblesm

[aasimkhan30]

Fixed in main