feat(cms): recover drafts and failed imports with verified UI workflows

e2e/ui/README.md

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+# Isolated UI regression checks
+
+Run `pnpm test:ui` after `pnpm install --frozen-lockfile` and `pnpm exec playwright install chromium`.
+The fixture server bundles real CMS components with local HTTP/server-action fixtures. It does not use the database or production credentials. Production smoke tests remain in the separate `pnpm test:e2e` command.
+
+The suite covers accessible settings switches, news editor/preview, support-table filters, import history, attachment recovery and news/event recovery. Axe checks WCAG A/AA rules. The sandboxed preview cannot execute Axe; its accessible name and keyboard exit are checked separately. Automated checks do not replace a full accessibility audit.
+
+Visual references are committed under `__screenshots__/<platform>/<viewport>`. Normal runs compare references and must not update them. For an intentional UI change, use `pnpm test:ui:update`, inspect every changed PNG and commit only accepted references. Keep the Playwright browser version aligned with the lockfile. Linux references must be captured on the Linux runner; Windows references are not interchangeable.
+
+Fixtures contain synthetic data only. Do not add production requests, environment secrets, ignored local documents or database access to tests. CI retains test reports and failures as the `ui-results` artifact.