Expired Cleaner: rename the safety toggle to dry_run (default ON), matching Re-tag

The destructive job's findings-vs-auto toggle was 'auto_delete: False'. Renamed
to 'dry_run: True' to match the Re-tag job's convention and make the safe
default unmistakable: dry run ON (default) = findings only, deletes nothing;
dry run OFF = hands-off auto-delete. Behaviour-identical to the previous
default — just clearer + consistent. Help text + tests updated.

core/repair_jobs/expired_download_cleaner.py

@@ -69,12 +69,13 @@ class ExpiredDownloadCleanerJob(RepairJob):
         'fewer than the keep-threshold (default: played more than once is kept). '
         'It only touches downloads recorded from the Download Origins feature '
         'forward — never your pre-existing or manually-added library.\n\n'
-        'By default it creates findings for you to review and delete. Set '
-        'Auto-delete to true for hands-off cleanup.\n\n'
+        'Dry run is ON by default: it only creates findings for you to review '
+        'and delete — nothing is deleted automatically. Turn Dry run OFF for '
+        'hands-off auto-cleanup.\n\n'
         'Settings:\n'
         '- Watchlist retention / Playlist retention: off, or a window\n'
         '- Keep if played at least: play count that protects a track (default 2)\n'
-        '- Auto-delete: delete automatically instead of creating findings'
+        '- Dry run: ON = findings only (default); OFF = delete automatically'
     )
     icon = 'repair-icon-cleanup'
     default_enabled = False
@@ -83,12 +84,12 @@ class ExpiredDownloadCleanerJob(RepairJob):
         'watchlist_retention': 'off',
         'playlist_retention': 'off',
         'keep_if_played_at_least': 2,
-        'auto_delete': False,
+        'dry_run': True,
     }
     setting_options = {
         'watchlist_retention': RETENTION_OPTIONS,
         'playlist_retention': RETENTION_OPTIONS,
-        'auto_delete': [False, True],
+        'dry_run': [True, False],
     }
     auto_fix = False
 
@@ -110,7 +111,7 @@ class ExpiredDownloadCleanerJob(RepairJob):
             min_plays = int(settings.get('keep_if_played_at_least', 2))
         except (TypeError, ValueError):
             min_plays = 2
-        auto_delete = bool(settings.get('auto_delete', False))
+        dry_run = bool(settings.get('dry_run', True))
 
         candidates = context.db.get_origin_cleanup_candidates()
         if not candidates:
@@ -150,7 +151,7 @@ class ExpiredDownloadCleanerJob(RepairJob):
         for i, entry in enumerate(expired):
             if context.check_stop():
                 return result
-            if auto_delete:
+            if not dry_run:
                 try:
                     res = delete_origin_download(context.db, entry, context.config_manager)
                     if res.get('removed') or res.get('file_deleted'):
@@ -191,7 +192,7 @@ class ExpiredDownloadCleanerJob(RepairJob):
 
         logger.info("[Expired Cleaner] %d candidates, %d expired (%s)",
                     len(candidates), len(expired),
-                    "auto-deleted" if auto_delete else "findings created")
+                    "findings created (dry run)" if dry_run else "auto-deleted")
         return result
 
     def estimate_scope(self, context: JobContext) -> int:

tests/test_expired_download_cleaner.py

@@ -104,11 +104,19 @@ def test_scan_protects_watched_artist():
     assert findings == []   # still watched → protected
 
 
-def test_scan_auto_delete_mode():
+def test_scan_dry_run_default_is_findings_only():
+    # No dry_run in settings → defaults to True → findings, never deletes.
+    db = _DB([_cand(1, created=OLD, path="/music/x.flac")])
+    findings = []
+    res = ExpiredDownloadCleanerJob().scan(_ctx(db, {'playlist_retention': '2mo'}, findings))
+    assert res.findings_created == 1 and db.deleted_history == []   # nothing deleted
+
+
+def test_scan_auto_delete_when_dry_run_off():
     db = _DB([_cand(1, created=OLD, path="/music/x.flac")])
     findings = []
     res = ExpiredDownloadCleanerJob().scan(_ctx(
-        db, {'playlist_retention': '2mo', 'auto_delete': True}, findings))
+        db, {'playlist_retention': '2mo', 'dry_run': False}, findings))
     assert findings == []                       # no findings in auto mode
     assert res.auto_fixed == 1
     assert 1 in db.deleted_history             # history row removed