Feature request: Detect duplicated files

[girlpunk]

Would be nice if this was flagged somewhere. Can probably just use the checksum to start with (which should be relatively easy given they're already being collected), but some kind of similarity algorithm would be nice long-term (for if stuff has been reencoded, etc)

[haku]

yea i already had a vague TODO item in my disorganised notes for something like this, both to show dupes on the item page and to provide some sort of way to list all files that have a dump
that was only going to be based on checksums, though something more advanced would be lovely, though not something i currently know how to implement

[haku]

adding the first part of this, the actual searching, turned out to be quite simple and proves the concept.
next part is to update the item page to list out the duplicate file paths, but might not get to doing that today.

[haku]

ok actually i did add the UI part cos i realised how quick it was.