fix(a11oy app): null-safe DOM writes (eliminate innerHTML race when navigating during async fetch)

fix(a11oy app): real endpoint contracts (replay {action}, lambda {axes}, puriq formulas) — no guessed payloads

feat(a11oy): full left-nav application at /console (10 live views + cross-flag switcher, unified house style)

feat(a11oy): real /console + /wires pages backed by live endpoints (no SPA soft-404, no stub)