chore: apply ruff auto-fixes and remove dead AST scripts

simulation/sim_context.py

@@ -1,4 +1,3 @@
-import sys
 import os
 import time
 from simulation.sim_base import BaseSimulation, run_sim
@@ -31,7 +30,7 @@ class ContextSimulation(BaseSimulation):
   self.client.click("btn_md_only")
   time.sleep(5)
   # Verify status
-  proj_updated = self.client.get_project()
+  self.client.get_project()
   status = self.client.get_value("ai_status")
   print(f"[Sim] Status: {status}")
   assert "md written" in status, f"Expected 'md written' in status, got {status}"