chore: import upstream snapshot with attribution

tests/settings/test_parse_multiselect.py

@@ -0,0 +1,46 @@
+"""
+Tests for _parse_multiselect() in settings/manager.py.
+
+Covers list passthrough, JSON array parsing, comma-separated splitting,
+and edge cases (empty, malformed, non-string/list types).
+"""
+
+from local_deep_research.settings.manager import _parse_multiselect
+
+
+class TestParseMultiselect:
+    """Tests for _parse_multiselect()."""
+
+    def test_list_passthrough(self):
+        assert _parse_multiselect(["a", "b"]) == ["a", "b"]
+
+    def test_empty_list_passthrough(self):
+        assert _parse_multiselect([]) == []
+
+    def test_json_array_string(self):
+        assert _parse_multiselect('["markdown","latex"]') == [
+            "markdown",
+            "latex",
+        ]
+
+    def test_json_array_with_spaces(self):
+        assert _parse_multiselect('  ["a", "b"]  ') == ["a", "b"]
+
+    def test_comma_separated_string(self):
+        assert _parse_multiselect("markdown,latex") == ["markdown", "latex"]
+
+    def test_comma_separated_with_spaces(self):
+        assert _parse_multiselect(" a , b , c ") == ["a", "b", "c"]
+
+    def test_single_value_no_comma(self):
+        assert _parse_multiselect("markdown") == ["markdown"]
+
+    def test_empty_string(self):
+        assert _parse_multiselect("") == []
+
+    def test_malformed_json_falls_back_to_comma(self):
+        result = _parse_multiselect('["broken')
+        assert result == ['["broken']
+
+    def test_non_string_non_list_passthrough(self):
+        assert _parse_multiselect(42) == 42