MainsKeeper 0.2.2 Battery Assurance correction release

Archives:
- mainskeeper-app-checkpoint-0.2.2.zip
- mainskeeper-app-0.2.2.zip

Verification performed:
- Syntax checks on changed modules: pass
- state-checks.js: 277 passed · 0 failed (group 11 covers 0.2.2 regressions)
- ZIP integrity: OK
- Prior 0.2.0 / 0.2.1 archives preserved

Browser verification and screenshots skipped by user request. Visual and browser-interaction acceptance remain unverified.
