feat(setup): detect filesystem properties during initial scan

SetupService.run() now checks each anime folder for tvshow.nfo,
logo.png, and poster/fanart images instead of using hardcoded
defaults. Provider key resolution via search is unchanged.

tests/unit/test_setup_service.py

@@ -390,3 +390,155 @@ class TestSetupServiceRun:
 
         assert result == 1
         mock_create.assert_called_once()
+
+
+class TestCheckNfoFile:
+    """Test _check_nfo_file method."""
+
+    def test_returns_true_when_tvshow_nfo_exists(self, tmp_path):
+        """tvshow.nfo exists → returns (True, path, created, updated)."""
+        folder = tmp_path / "Series"
+        folder.mkdir()
+        nfo_file = folder / "tvshow.nfo"
+        nfo_file.touch()
+
+        has_nfo, nfo_path, created, updated = SetupService._check_nfo_file(folder)
+
+        assert has_nfo is True
+        assert nfo_path == str(nfo_file)
+        assert created is not None
+        assert updated is not None
+
+    def test_returns_false_when_no_nfo(self, tmp_path):
+        """No tvshow.nfo → returns (False, None, None, None)."""
+        folder = tmp_path / "Series"
+        folder.mkdir()
+
+        has_nfo, nfo_path, created, updated = SetupService._check_nfo_file(folder)
+
+        assert has_nfo is False
+        assert nfo_path is None
+        assert created is None
+        assert updated is None
+
+    def test_returns_false_when_nfo_is_directory(self, tmp_path):
+        """tvshow.nfo exists but is a directory → returns False."""
+        folder = tmp_path / "Series"
+        folder.mkdir()
+        (folder / "tvshow.nfo").mkdir()
+
+        has_nfo, nfo_path, created, updated = SetupService._check_nfo_file(folder)
+
+        assert has_nfo is False
+
+
+class TestCheckLogoFile:
+    """Test _check_logo_file method."""
+
+    def test_returns_true_when_logo_png_exists(self, tmp_path):
+        """logo.png exists → returns True."""
+        folder = tmp_path / "Series"
+        folder.mkdir()
+        (folder / "logo.png").touch()
+
+        assert SetupService._check_logo_file(folder) is True
+
+    def test_returns_false_when_no_logo(self, tmp_path):
+        """No logo.png → returns False."""
+        folder = tmp_path / "Series"
+        folder.mkdir()
+
+        assert SetupService._check_logo_file(folder) is False
+
+    def test_returns_false_for_other_files(self, tmp_path):
+        """Files like logo.jpg or logo.gif → returns False."""
+        folder = tmp_path / "Series"
+        folder.mkdir()
+        (folder / "logo.jpg").touch()
+        (folder / "logo.gif").touch()
+
+        assert SetupService._check_logo_file(folder) is False
+
+
+class TestCheckImageFiles:
+    """Test _check_image_files method."""
+
+    def test_returns_true_for_poster_jpg(self, tmp_path):
+        """poster.jpg exists → returns True."""
+        folder = tmp_path / "Series"
+        folder.mkdir()
+        (folder / "poster.jpg").touch()
+
+        assert SetupService._check_image_files(folder) is True
+
+    def test_returns_true_for_poster_jpeg(self, tmp_path):
+        """poster.jpeg exists → returns True."""
+        folder = tmp_path / "Series"
+        folder.mkdir()
+        (folder / "poster.jpeg").touch()
+
+        assert SetupService._check_image_files(folder) is True
+
+    def test_returns_true_for_poster_png(self, tmp_path):
+        """poster.png exists → returns True."""
+        folder = tmp_path / "Series"
+        folder.mkdir()
+        (folder / "poster.png").touch()
+
+        assert SetupService._check_image_files(folder) is True
+
+    def test_returns_true_for_fanart_jpg(self, tmp_path):
+        """fanart.jpg exists → returns True."""
+        folder = tmp_path / "Series"
+        folder.mkdir()
+        (folder / "fanart.jpg").touch()
+
+        assert SetupService._check_image_files(folder) is True
+
+    def test_returns_false_when_no_images(self, tmp_path):
+        """No poster or fanart images → returns False."""
+        folder = tmp_path / "Series"
+        folder.mkdir()
+        (folder / "episode_01.mp4").touch()
+
+        assert SetupService._check_image_files(folder) is False
+
+    def test_returns_false_for_unrelated_files(self, tmp_path):
+        """Files not matching poster/fanart pattern → returns False."""
+        folder = tmp_path / "Series"
+        folder.mkdir()
+        (folder / "banner.png").touch()
+        (folder / "thumbnail.jpg").touch()
+
+        assert SetupService._check_image_files(folder) is False
+
+
+class TestGetSeriesProperties:
+    """Test _get_series_properties method."""
+
+    def test_returns_all_properties_from_filesystem(self, tmp_path):
+        """Folder with tvshow.nfo, logo.png, poster.jpg → returns correct props."""
+        folder = tmp_path / "Series"
+        folder.mkdir()
+        (folder / "tvshow.nfo").touch()
+        (folder / "logo.png").touch()
+        (folder / "poster.jpg").touch()
+
+        props = SetupService._get_series_properties(folder)
+
+        assert props.has_nfo is True
+        assert props.nfo_path is not None
+        assert props.logo_loaded is True
+        assert props.images_loaded is True
+
+    def test_returns_defaults_when_no_files(self, tmp_path):
+        """Empty folder → returns all False/None."""
+        folder = tmp_path / "Series"
+        folder.mkdir()
+
+        props = SetupService._get_series_properties(folder)
+
+        assert props.has_nfo is False
+        assert props.nfo_path is None
+        assert props.logo_loaded is False
+        assert props.images_loaded is False