libchev 1.1.3

Keep each debug console and its child controls in one native stacking group, so overlapping addon windows do not interleave their contents. Category menus stay inside the owning console instead of using a global tooltip layer. All changes apply only to addon-owned frames.

Validation: 89 library checks pass in both orders under Lua 5.1/5.2; 24 Python vendor checks pass; parsing, formatting, whitespace, and GitHub PR checks pass. Live multi-window interaction remains a separate client check.