✨ feat: add admin smoke tests and enhance testing documentation with new strategies and configurations

tests/AGENTS.md

@@ -9,11 +9,13 @@ For the full current workflow, prefer the `playwright-testing` skill.
 - All tests: `yarn test`
 - E2E: `yarn test:e2e`
 - API: `yarn test:api`
+- Admin smoke: `npx playwright test tests/e2e-admin/smoke.spec.ts --project=admin`
 - Visual regression: `yarn test:visual`
 - Single file: `npx playwright test tests/e2e/filename.spec.ts`
 - Single test: `npx playwright test -g "test name"`
 - After code changes, run only affected spec files — not the full suite.
 - Prefer the configured `CODING_URL` from `.env` whenever it serves both `/` and `/api/...`.
+- Admin browser tests use `CODING_TIBIADMIN_URL` from `.env` and default to `admin/admin` unless overridden via env vars.
 - The current test baseline is deterministic and seed-driven, not demo-content-driven.
 
 ## BrowserSync workaround
@@ -32,16 +34,23 @@ BrowserSync keeps a WebSocket open permanently, preventing `networkidle` and `lo
 - `tests/global-teardown.ts` removes seeded content again and disposes shared API contexts.
 - Seed data lives in `tests/api/helpers/seed-data.ts`.
 - Seeded route constants live in `tests/fixtures/test-constants.ts`.
+- Prefer a hidden `_testdata` boolean field as the last field per collection as the primary marker for seeded test data.
+- Cleanup belongs both in `globalSetup` and `globalTeardown`.
+- Seed creation/cleanup must stay run-scoped so the suite works with many workers; do not create or delete shared seeded data in per-test hooks.
 - If tests write to a collection through `ADMIN_TOKEN`, that collection must define explicit permissions like `"token:${ADMIN_TOKEN}":`.
 
 ## Fixtures & helpers
 
 - `e2e/fixtures.ts` — Shared desktop helpers (`waitForSpaReady`, `navigateToRoute`, `clickSpaLink`) with BrowserSync-safe navigation defaults.
+- `e2e-admin/fixtures.ts` — Shared admin helpers (`loginToAdmin`, `openNovaProjectDashboard`) for committed admin smoke coverage.
+- `e2e-admin/content-config.spec.ts` — Checks that collection config is actually reflected in Nova: sensible list columns/previews, usable widgets, and working pagebuilder preview.
 - `e2e-visual/fixtures.ts` — Visual test helpers (`waitForVisualReady`, `hideDynamicContent`, `prepareForScreenshot`, `expectScreenshot`, `getDynamicMasks`).
 - `e2e-mobile/fixtures.ts` — Mobile helpers (`openHamburgerMenu`, `isMobileViewport`, `isTabletViewport`, `isBelowLg`).
 - `api/fixtures.ts` — API fixtures (`api`, `adminApi`).
 - `api/helpers/` — API test utilities (`admin-api.ts`, `seed-data.ts`, `maildev.ts`).
 - `fixtures/test-constants.ts` — Central constants (`ADMIN_TOKEN`, `API_BASE`, `TEST_BASE_URL`, `SEEDED_TEST_CONTENT`).
+- Use committed admin smoke tests for stable admin contracts. Use one-shot MCP/browser checks only as exploratory supplements, not as the sole regression guard for important admin paths.
+- Use admin tests specifically to catch broken collection configuration: empty/bad list previews, missing widgets, broken dependsOn behavior, or non-rendering pagebuilder previews.
 - `api/helpers/test-user.ts` is legacy starter scaffolding and should only be reused if the project really needs JWT-user coverage again.
 
 ## Visual regression