U10 — Dual-wiki + Fis contract

Plan

Split FI-STUDIO-001 into operator/system handbook pair describing how Studio should work after remediation.

Do

1. Add docs/handbook/operator/intelligence-studio.md (who, workflows, limits).
2. Add docs/handbook/system/intelligence-studio.md (APIs, modules, verification).
3. Update feature-index.md, traceability matrix, docs/index.md; stub-redirect docs/intelligence-studio.md.
4. Rewrite Fis contract + oracle to match remediated UI.

Check

scripts/fi-studio-ux-pdca/check-phase-gate.sh U10

Act

Align dual-wiki pages and feature-index until U10 gate is green; then proceed to U11.