refactor(types): auto -> None sweep across entire codebase

Applied 236 return type annotations to functions with no return values
across 100+ files (core modules, tests, scripts, simulations).
Added Phase 4 to python_style_refactor track for remaining 597 items
(untyped params, vars, and functions with return values).

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

simulation/live_walkthrough.py

@@ -5,7 +5,7 @@ import random
 from api_hook_client import ApiHookClient
 from simulation.workflow_sim import WorkflowSimulator
 
-def main():
+def main() -> None:
  client = ApiHookClient()
  print("=== Manual Slop: Live UX Walkthrough ===")
  print("Connecting to GUI...")