feat(notes): _strip_type_nouns helper for search query sanitization

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

tests/test_tool_use_fixes.py

@@ -28,3 +28,29 @@ async def test_search_projects_tool_returns_success_true():
     assert result["success"] is True
     assert result["type"] == "projects_list"
     assert len(result["data"]["projects"]) == 1
+
+
+def test_strip_type_nouns_removes_task_word():
+    from fabledassistant.services.notes import _strip_type_nouns
+    assert _strip_type_nouns("sebring secondary task") == ["sebring", "secondary"]
+
+
+def test_strip_type_nouns_removes_all_variants():
+    from fabledassistant.services.notes import _strip_type_nouns
+    assert _strip_type_nouns("project notes task") == []
+
+
+def test_strip_type_nouns_case_insensitive():
+    from fabledassistant.services.notes import _strip_type_nouns
+    assert _strip_type_nouns("Sebring Task NOTES") == ["Sebring"]
+
+
+def test_strip_type_nouns_preserves_real_content_words():
+    from fabledassistant.services.notes import _strip_type_nouns
+    assert _strip_type_nouns("circuit configuration") == ["circuit", "configuration"]
+
+
+def test_strip_type_nouns_handles_empty_string():
+    from fabledassistant.services.notes import _strip_type_nouns
+    assert _strip_type_nouns("") == []
+    assert _strip_type_nouns("   ") == []