Release v1.81

Changes in this release

• Bump version to 1.81 (125644c)
• Update CLAUDE.md: remove stale file references, document new script/workflow (8d08e96)
• Wire check_skin_consistency.py into CI (099f5ea)
• Add dev-time skin consistency checker (7cf302b)
• Fix start_proxy.sh/py hardcoded path for lib64 installs (9eacfa9)
• Fix satellite priority matching, consolidate country lookups, harden cache (bb874d0)
• Update translations via workflow (ae94fae)
• Apply auto PEP8 aggressive fixes (26a5dc0)
• Update update_translations.py (16dd83e)
• Update translations via workflow (cc2eb90)