test: full test suite (Vitest + pgTAP + Playwright) + TDD plan restructure

Add a 4-layer test stack covering RLS, triggers, and UI flows for Fases 0–2a,
then restructure every plan file so future fases start with tests and end with
a verification gate.

Test suite
- packages/test-utils: Vitest integration tests signing HS256 JWTs via jose so
  each test acts as a specific seed user (createClientAs + createAdminClient)
- supabase/tests: pgTAP for accept_invitation(), item_frequency trigger, and
  promote-on-admin-leave; each file self-installs pgtap extension
- apps/web/tests: Playwright E2E with live Keycloak login per test (storageState
  caching doesn't rehydrate Supabase's session state reliably)
- just test-all chains the three suites; test-db forwards POSTGRES_PASSWORD
  as PGPASSWORD with ON_ERROR_STOP=1 so failures abort the chain

Supabase auth gotcha
- PostgREST queries inside onAuthStateChange deadlock on GoTrue's navigator.locks
  auth lock (getAccessToken → getSession → initializePromise waits on the same
  lock that's held during event dispatch). Fix is two defenses: a pass-through
  lock in $lib/supabase, and a setTimeout(0) defer in root +layout.svelte to
  push loadUserCollectives out of the callback's microtask chain. Either alone
  is insufficient; both together unblock the Playwright suite.

Env key rotation
- apps/web/.env.development had a stale demo anon key signed with a different
  secret than root .env; Vite inlined that into the browser bundle so Kong (which
  uses the root .env value) rejected every request with 401. Aligned the two
  files and added a memory entry to flag this for the next rotation.

Plan restructure (TDD)
- Every fase now opens with X.0 Tests primero and closes with X.Z Verificación
  final. Completed fases (0, 1, 2a) show the pattern retroactively with the
  tests that currently cover them; pending fases (2b, 3, 4) list the tests to
  write before implementation.

Docs
- CLAUDE.md status line reports 54 + 12 + 15 = 81 green tests, adds gotchas
  #11 (auth-lock deadlock) and #12 (no storageState caching)
- README.md adds a TDD methodology section and the test-all command
- .gitignore excludes Playwright's generated reports and auth state

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

apps/web/tests/fixtures/login.ts

@@ -0,0 +1,37 @@
+/**
+ * Live login helper — runs the real Keycloak OAuth flow in the current context.
+ *
+ * We use this instead of `storageState` because Supabase JS v2's async
+ * `_recoverAndRefresh` doesn't reliably re-fire `onAuthStateChange`/INITIAL_SESSION
+ * when the browser context is built from a saved localStorage snapshot. Doing the
+ * full login for each test adds ~2–3 seconds but produces deterministic state.
+ */
+import type { Page } from '@playwright/test';
+import type { USERS } from './users.js';
+
+export async function loginAs(page: Page, user: (typeof USERS)[keyof typeof USERS]): Promise<void> {
+	await page.goto('/');
+	await page.waitForURL(/\/realms\/colectivo\/protocol\/openid-connect\/auth/, {
+		timeout: 15_000
+	});
+	await page.fill('#username', user.email);
+	await page.fill('#password', user.password);
+	await page.click('#kc-login');
+
+	// Wait until we're redirected OFF the callback page. The root layout's
+	// post-login routing sends the user to /lists (or /onboarding) only after
+	// the deferred loadUserCollectives call resolves, so we can't call the
+	// login done until we've left /auth/callback.
+	await page.waitForURL(
+		(url) => url.origin === 'http://localhost:5173' && !url.pathname.startsWith('/auth/callback'),
+		{ timeout: 20_000 }
+	);
+	await page.waitForFunction(
+		() =>
+			Object.keys(window.localStorage).some(
+				(k) => k.startsWith('sb-') && k.endsWith('-auth-token')
+			),
+		null,
+		{ timeout: 15_000 }
+	);
+}