chore(checkpoint): Phase 4 Codebase-Wide Type Hint Sweep complete. Total fixes: ~400+. Verification status: 230 pass, 16 fail (pre-existing API drift), 29 error (live_gui env).

scripts/scan_all_hints.py

@@ -19,6 +19,7 @@ for root, dirs, files in os.walk('.'):
    continue
   counts: list[int] = [0, 0, 0]  # nr, up, uv
   def scan(scope: ast.AST, prefix: str = '') -> None:
+   # Iterate top-level nodes in this scope
    for node in ast.iter_child_nodes(scope):
     if isinstance(node, (ast.FunctionDef, ast.AsyncFunctionDef)):
      if node.returns is None:
@@ -26,11 +27,11 @@ for root, dirs, files in os.walk('.'):
      for arg in node.args.args:
       if arg.arg not in ('self', 'cls') and arg.annotation is None:
        counts[1] += 1
-    if isinstance(node, ast.Assign):
+    elif isinstance(node, ast.Assign):
      for t in node.targets:
       if isinstance(t, ast.Name):
        counts[2] += 1
-    if isinstance(node, ast.ClassDef):
+    elif isinstance(node, ast.ClassDef):
      scan(node, prefix=f'{node.name}.')
   scan(tree)
   nr, up, uv = counts