findExistingTrack split the filename at the first ' - ' assuming 'Artist - Title',
so a title with internal dashes ('Kingdom Hearts 2 - Dearly Beloved - Main Theme')
or a garbage/absent artist prefix ('01-01 - …') was mis-parsed → the duplicate went
undetected and got re-downloaded (3-4x). Now match the query title against BOTH the
full stem AND the part after the first ' - ', so titles with dashes and prefix-only
filenames are recognized. Normal 'Artist - Title' files still match; no false
positives; remix-vs-base distinction preserved. Unit-tested on the exact KH case.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
