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/users.ts

@@ -0,0 +1,42 @@
+// Seed user constants for E2E tests.
+// Matches supabase/seed.sql and keycloak/realm-export.json.
+
+export const USERS = {
+	ana: {
+		id: '11111111-1111-1111-1111-111111111111',
+		email: 'ana@dev.local',
+		password: 'test1234',
+		displayName: 'Ana García',
+		role: 'admin' as const,
+		storageState: 'tests/.auth/ana.json'
+	},
+	borja: {
+		id: '22222222-2222-2222-2222-222222222222',
+		email: 'borja@dev.local',
+		password: 'test1234',
+		displayName: 'Borja López',
+		role: 'member' as const,
+		storageState: 'tests/.auth/borja.json'
+	},
+	david: {
+		id: '44444444-4444-4444-4444-444444444444',
+		email: 'david@dev.local',
+		password: 'test1234',
+		displayName: 'David Fernández',
+		role: 'guest' as const,
+		storageState: 'tests/.auth/david.json'
+	},
+	eva: {
+		id: '55555555-5555-5555-5555-555555555555',
+		email: 'eva@dev.local',
+		password: 'test1234',
+		displayName: 'Eva Ruiz',
+		role: 'none' as const, // no collective
+		storageState: 'tests/.auth/eva.json'
+	}
+} as const;
+
+export type UserKey = keyof typeof USERS;
+export const COLLECTIVE_NAME = 'Casa García-López';
+export const KEYCLOAK_URL = process.env.PUBLIC_KEYCLOAK_URL ?? 'http://localhost:8080';
+export const KEYCLOAK_REALM = process.env.PUBLIC_KEYCLOAK_REALM ?? 'colectivo';