fix: change flow viz del dir; method inspection

* chore: update flow viz deletion dir, add typing
* tests: add flow viz tests to ensure lib dir is not deleted

lib/crewai/tests/test_flow.py

@@ -850,6 +850,31 @@ def test_flow_plotting():
     assert isinstance(received_events[0].timestamp, datetime)
 
 
+def test_method_calls_crew_detection():
+    """Test that method_calls_crew() detects .crew(), .kickoff(), and .kickoff_async() calls."""
+    from crewai.flow.visualization_utils import method_calls_crew
+    from crewai import Agent
+
+    # Test with a real Flow that uses agent.kickoff()
+    class FlowWithAgentKickoff(Flow):
+        @start()
+        def run_agent(self):
+            agent = Agent(role="test", goal="test", backstory="test")
+            return agent.kickoff("query")
+
+    flow = FlowWithAgentKickoff()
+    assert method_calls_crew(flow.run_agent) is True
+
+    # Test with a Flow that has no crew/agent calls
+    class FlowWithoutCrewCalls(Flow):
+        @start()
+        def simple_method(self):
+            return "Just a regular method"
+
+    flow2 = FlowWithoutCrewCalls()
+    assert method_calls_crew(flow2.simple_method) is False
+
+
 def test_multiple_routers_from_same_trigger():
     """Test that multiple routers triggered by the same method all activate their listeners."""
     execution_order = []