docs(design): add final validation evidence

README.md

@@ -4,6 +4,12 @@
 
 MobilityOps is a working proof of concept for a fictitious mobility company. It combines vehicle and booking operations, a controlled vehicle-return workflow, data-quality review, RAGcore-backed internal knowledge, n8n orchestration and read-only tools published through ITWorx MCP Hub.
 
+The web application uses the premium responsive **Control Rail** interface: a compact
+operations-first workspace with persisted readiness metrics, evidence-led exceptions,
+review-before-commit return handling and mobile navigation designed down to 390 px. See
+`docs/design/design-directions.md` and `docs/design/implementation-validation.md` for the
+design decision and visual evidence.
+
 All people, companies, vehicles, bookings and documents are synthetic. The workflows, validation, integrations, audit logging and access boundaries are intended to be real.
 
 ## Scope
@@ -53,6 +59,7 @@ commands.
 - `backend/` — FastAPI/SQLAlchemy/Alembic API.
 - `frontend/` — React/TypeScript/Vite web app, including the Playwright end-to-end suite (`frontend/e2e/`).
 - `artifacts/evidence/` — final acceptance evidence (screenshots, architecture, `final-summary.md`).
+- `artifacts/design-validation/` — baseline audit, Stitch direction references and implemented responsive captures.
 
 ## Quickstart
 
@@ -78,7 +85,7 @@ All defaults are configurable via `.env` (see `.env.example`).
 ```bash
 make test    # backend: pytest (66 tests)
 make lint    # backend: ruff + mypy (strict, zero errors)
-make e2e     # frontend: Playwright end-to-end (12 tests, live stack required)
+make e2e     # frontend: Playwright end-to-end (18 tests, live stack required)
 ```
 
 Frontend build/typecheck: `cd frontend && npm run build` (`tsc -b && vite build`).