vault support - Selective hiding few specific set of folders/ media

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Is your feature request related to a problem? Please describe.
I have huge media, which I do offen share it with my family, but still there are few media which I don't like to share them, for this purpose - I am looking something like valut / hidden in ios photos app.

Describe the solution you'd like
something like valut / hidden in ios photos app.
a corner location where I can access hidden media, where I can set second level of authentication.

Ability to add & remove data (folder, media) from vault / hidden folder

Describe alternatives you've considered
manally marking folder as .nomedia
problem with this when I want to see those files back then I need to remember where all location I have created .nomedia files. (it sucks to be honest)

Additional context
Add any other context or screenshots about the feature request here.

No files, tests, or entry points are named; start by surveying the server's existing file-visibility and authentication components. The issue needs an agreed design covering selective folder/media hiding, vault access, authentication, and add/remove behavior before implementation can be considered done.