fix(admin): simulations view-only + docs path in Docker (#109 #110)

- simulate/page.tsx: remove launch form — simulations are triggered via
  Airflow DAG, not the admin UI. Page now shows run history + links to
  Airflow and MLflow only (#109)
- docs.ts: use DOCS_ROOT env var (fallback: ../../docs for local dev) so
  the path works in Docker standalone where CWD is /app (#110)
- Dockerfile.admin: copy docs/ into the runner image at /app/docs and set
  DOCS_ROOT=/app/docs so listAllDocs() finds the files at runtime (#110)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

apps/admin/src/lib/docs.ts

@@ -13,8 +13,11 @@ import { readdir, readFile } from 'fs/promises';
 import path from 'path';
 import { marked } from 'marked';
 
-// apps/admin sits two levels below the monorepo root.
-const DOCS_ROOT = path.resolve(process.cwd(), '../../docs');
+// In development: process.cwd() = apps/admin/, so ../../docs = monorepo root docs/.
+// In Docker standalone: CWD = /app, so ../../docs is wrong. Set DOCS_ROOT in the
+// container to the absolute path where docs/ is copied (e.g. /app/docs).
+const DOCS_ROOT =
+  process.env.DOCS_ROOT ?? path.resolve(process.cwd(), '../../docs');
 
 export type DocCategory = 'adr' | 'architecture';