Perfection audit: fix 262 findings across all subsystems
Full-app audit (15 finders + adversarial verification) and fix pass:
data-safety (backup/restore/cloud baseline), rules correctness for both
systems (rests, crits, slots, proficiency), combat engine (HP floor,
massive-damage overflow, idempotent condition ticks), no-auto-roll
enforcement everywhere, realtime protocol hardening (seat deny/takeover,
room end, image budgets), PWA update flow, PF2e sheet parity (Class DC,
armor picker, agile/striking), and 143 new unit/e2e tests.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>