fix(core): ui questionmark

tests/test_import_flow.py

@@ -160,7 +160,7 @@ def test_audio_tags_written_on_import(client):
     }]})
     assert resp.json()["results"][0]["ok"]
 
-    dest = root / "Ulf Blanck" / "Die drei ？？？ Kids Folge 085"  # "?" becomes fullwidth
+    dest = root / "Ulf Blanck" / "Die drei ??? Kids Folge 085"
     files = sorted(dest.iterdir())
     tags = ID3(files[0])
     assert str(tags["TALB"]) == "Die drei ??? Kids Folge 085"

tests/test_naming.py

@@ -9,9 +9,9 @@ def req(**kw):
     return SimpleNamespace(**base)
 
 
-def test_sanitize_replaces_forbidden_chars():
-    assert sanitize("Die drei ???") == "Die drei ？？？"
-    assert sanitize("a/b") == "a⧸b"
+def test_sanitize_keeps_special_chars_but_strips_separators():
+    assert sanitize("Die drei ???") == "Die drei ???"
+    assert sanitize("a/b\\c") == "abc"
     assert "\x01" not in sanitize("a\x01b")