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>

outline_tool.py

@@ -2,7 +2,7 @@ import ast
 from pathlib import Path
 
 class CodeOutliner:
- def __init__(self):
+ def __init__(self) -> None:
   pass
 
  def outline(self, code: str) -> str: