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>

packages/test-utils/src/supabase-clients.ts

@@ -0,0 +1,52 @@
+import { createClient } from '@supabase/supabase-js';
+import { SignJWT } from 'jose';
+import type { Database } from '@colectivo/types';
+
+function requiredEnv(key: string): string {
+	const value = process.env[key];
+	if (!value) throw new Error(`Missing required env var: ${key}`);
+	return value;
+}
+
+/**
+ * Sign a GoTrue-compatible JWT for a seed user using the shared SUPABASE_JWT_SECRET.
+ * This lets integration tests act as any seed user without going through Keycloak.
+ */
+async function signToken(userId: string): Promise<string> {
+	const secret = new TextEncoder().encode(requiredEnv('SUPABASE_JWT_SECRET'));
+	return new SignJWT({ role: 'authenticated' })
+		.setProtectedHeader({ alg: 'HS256' })
+		.setSubject(userId)
+		.setAudience('authenticated')
+		.setIssuedAt()
+		.setExpirationTime('1h')
+		.sign(secret);
+}
+
+/**
+ * Create a Supabase client that authenticates as the given seed user.
+ * RLS policies see auth.uid() = userId.
+ */
+export async function createClientAs(userId: string) {
+	const token = await signToken(userId);
+	return createClient<Database>(
+		requiredEnv('PUBLIC_SUPABASE_URL'),
+		requiredEnv('PUBLIC_SUPABASE_ANON_KEY'),
+		{
+			global: { headers: { Authorization: `Bearer ${token}` } },
+			auth: { persistSession: false, autoRefreshToken: false }
+		}
+	);
+}
+
+/**
+ * Create a service-role client that bypasses RLS entirely.
+ * Use only for test setup and cleanup — never in assertions.
+ */
+export function createAdminClient() {
+	return createClient<Database>(
+		requiredEnv('PUBLIC_SUPABASE_URL'),
+		requiredEnv('SUPABASE_SERVICE_ROLE_KEY'),
+		{ auth: { persistSession: false, autoRefreshToken: false } }
+	);
+}