Console redesign lands across the whole app

- New console shell for signed-in pages: fixed left sidebar, command palette, and shared design tokens.
- Dashboard, threat log, docs, and all five product workbenches (Vaults, RAG, Shield, Honeypot, Audit) rebuilt on the console visual language.
- Settings, billing, referral, and onboarding moved to the same language; new public verify and status pages.
- Mobile: console nav drawer, responsive instruments strip, and the sign-in / sign-up form is now visible above the fold.
- Post-redesign audit fixes for trust and correctness bugs, including a threat-log verify link that broke the build.