Fix Duplicate Detector ignoring 'allow duplicate tracks across albums'

The Duplicate Detector repair job had its own ignore_cross_album setting
that was independent of the global allow_duplicate_tracks setting. When
a user enabled 'Allow duplicate tracks across albums', the detector
still flagged same-titled tracks on different albums as duplicates.
Now respects the global setting — if duplicates are allowed, cross-album
matches are always skipped.

core/repair_jobs/duplicate_detector.py

@@ -47,6 +47,11 @@ class DuplicateDetectorJob(RepairJob):
         artist_threshold = float(settings.get('artist_similarity', 0.80))
         ignore_cross_album = settings.get('ignore_cross_album', True)
 
+        # Respect the global "allow duplicate tracks across albums" setting —
+        # if the user explicitly allows duplicates across albums, never flag them
+        if context.config_manager and context.config_manager.get('library.allow_duplicate_tracks', False):
+            ignore_cross_album = True
+
         # Fetch all tracks with artist/album names via JOIN
         tracks = []
         conn = None