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>

scripts/claude_tool_bridge.py

@@ -15,7 +15,7 @@ except ImportError:
     sys.exit(1)
 
 
-def main():
+def main() -> None:
     logging.basicConfig(level=logging.DEBUG, format='%(asctime)s - %(levelname)s - %(message)s', stream=sys.stderr)
     logging.debug("Claude Tool Bridge script started.")
     try: