feat: add Playwright E2E and API regression test suite

Production-ready test infrastructure with Page Object Model pattern,
reusable fixtures for auth/DB/test-data, and example tests covering
login flow, dashboard, accounts CRUD API, and visual regression.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

tests/fixtures/auth.fixture.ts

@@ -0,0 +1,108 @@
+/**
+ * Authentication fixture for E2E tests.
+ *
+ * Provides helpers to authenticate via the API and manage JWT tokens.
+ * The auth.setup.ts project uses this to create persistent auth state
+ * that other tests reuse (avoiding login in every test).
+ */
+
+import { type APIRequestContext, type BrowserContext } from '@playwright/test';
+import { TEST_USERS } from './test-data';
+
+const API_BASE = process.env.API_BASE_URL || 'http://localhost/api';
+
+export interface AuthTokens {
+  accessToken: string;
+  user: Record<string, unknown>;
+  organizations: Array<Record<string, unknown>>;
+}
+
+/**
+ * Login via the API and return tokens.
+ * Uses Playwright's request context (no browser needed).
+ */
+export async function apiLogin(
+  request: APIRequestContext,
+  credentials: { email: string; password: string } = TEST_USERS.treasurer,
+): Promise<AuthTokens> {
+  const response = await request.post(`${API_BASE}/auth/login`, {
+    data: {
+      email: credentials.email,
+      password: credentials.password,
+    },
+  });
+
+  if (!response.ok()) {
+    const body = await response.text();
+    throw new Error(`Login failed (${response.status()}): ${body}`);
+  }
+
+  return response.json();
+}
+
+/**
+ * Switch to a specific organization after login.
+ */
+export async function apiSwitchOrg(
+  request: APIRequestContext,
+  accessToken: string,
+  organizationId: string,
+): Promise<AuthTokens> {
+  const response = await request.post(`${API_BASE}/auth/switch-org`, {
+    data: { organizationId },
+    headers: { Authorization: `Bearer ${accessToken}` },
+  });
+
+  if (!response.ok()) {
+    const body = await response.text();
+    throw new Error(`Switch org failed (${response.status()}): ${body}`);
+  }
+
+  return response.json();
+}
+
+/**
+ * Create an authenticated API request context with a Bearer token.
+ * Useful for API-level tests that don't need a browser.
+ */
+export function authHeaders(accessToken: string) {
+  return {
+    Authorization: `Bearer ${accessToken}`,
+    'Content-Type': 'application/json',
+  };
+}
+
+/**
+ * Inject auth state into a browser context's localStorage.
+ * Matches the frontend's Zustand authStore shape.
+ */
+export async function injectAuthState(
+  context: BrowserContext,
+  tokens: AuthTokens,
+  orgId?: string,
+): Promise<void> {
+  const baseURL = process.env.BASE_URL || 'http://localhost';
+
+  // The frontend uses Zustand with persist middleware in localStorage
+  // under key 'auth-storage'. We inject it so the frontend thinks
+  // the user is already logged in.
+  const selectedOrg = orgId
+    ? tokens.organizations.find((o: any) => o.id === orgId)
+    : tokens.organizations[0];
+
+  const authState = {
+    state: {
+      token: tokens.accessToken,
+      user: tokens.user,
+      organizations: tokens.organizations,
+      currentOrg: selectedOrg
+        ? { id: (selectedOrg as any).id, name: (selectedOrg as any).name, role: (selectedOrg as any).role }
+        : null,
+    },
+    version: 0,
+  };
+
+  await context.addInitScript((authData) => {
+    window.localStorage.setItem('auth-storage', JSON.stringify(authData));
+  }, authState);
+}

tests/fixtures/base.fixture.ts

@@ -0,0 +1,87 @@
+/**
+ * Base Playwright fixture that combines auth + DB helpers.
+ *
+ * Extends the default `test` object so every test file can
+ * import from here and get typed access to fixtures.
+ *
+ * Usage:
+ *   import { test, expect } from '../fixtures/base.fixture';
+ *   test('my test', async ({ authedPage, apiContext }) => { ... });
+ */
+
+import { test as base, type Page, type APIRequestContext } from '@playwright/test';
+import { apiLogin, apiSwitchOrg, authHeaders, type AuthTokens } from './auth.fixture';
+import { testDb } from './db.fixture';
+import { TEST_USERS } from './test-data';
+
+const API_BASE = process.env.API_BASE_URL || 'http://localhost/api';
+
+type TestFixtures = {
+  /** Pre-authenticated API request context with Bearer token */
+  authedRequest: APIRequestContext & { _tokens: AuthTokens };
+  /** Access token string for manual header construction */
+  accessToken: string;
+};
+
+type WorkerFixtures = {
+  /** Shared database connection (one per worker) */
+  db: typeof testDb;
+};
+
+export const test = base.extend<TestFixtures, WorkerFixtures>({
+  /**
+   * Worker-scoped database connection.
+   * Connects once per worker, disconnects when the worker exits.
+   */
+  db: [
+    async ({}, use) => {
+      await testDb.connect();
+      await use(testDb);
+      await testDb.disconnect();
+    },
+    { scope: 'worker' },
+  ],
+
+  /**
+   * Per-test authenticated API request context.
+   * Logs in as the default test user and attaches the Bearer token.
+   */
+  authedRequest: async ({ playwright }, use) => {
+    const requestContext = await playwright.request.newContext({
+      baseURL: API_BASE,
+    });
+
+    const tokens = await apiLogin(requestContext, TEST_USERS.treasurer);
+
+    // If user belongs to orgs, switch to the first one
+    let finalTokens = tokens;
+    if (tokens.organizations?.length > 0) {
+      const orgId = (tokens.organizations[0] as any).id;
+      try {
+        finalTokens = await apiSwitchOrg(requestContext, tokens.accessToken, orgId);
+      } catch {
+        // switch-org may not be needed if token already scoped
+        finalTokens = tokens;
+      }
+    }
+
+    // Create a new context with the auth header baked in
+    const authedContext = await playwright.request.newContext({
+      baseURL: API_BASE,
+      extraHTTPHeaders: authHeaders(finalTokens.accessToken),
+    });
+
+    // Attach tokens for tests that need them
+    (authedContext as any)._tokens = finalTokens;
+
+    await use(authedContext as any);
+    await authedContext.dispose();
+    await requestContext.dispose();
+  },
+
+  accessToken: async ({ authedRequest }, use) => {
+    await use((authedRequest as any)._tokens.accessToken);
+  },
+});
+
+export { expect } from '@playwright/test';

tests/fixtures/db.fixture.ts

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+/**
+ * Database fixture for E2E tests.
+ *
+ * Provides helpers to seed and clean up test data in Postgres.
+ * Uses the `pg` driver directly (same driver the backend uses)
+ * to avoid coupling tests to the backend's TypeORM setup.
+ *
+ * Usage in tests:
+ *   import { testDb } from '../fixtures/db.fixture';
+ *   test.beforeAll(async () => { await testDb.connect(); });
+ *   test.afterAll(async () => { await testDb.cleanup(); await testDb.disconnect(); });
+ */
+
+import { Pool, type PoolClient } from 'pg';
+import { TEST_PREFIX } from './test-data';
+
+const TEST_DB_URL =
+  process.env.TEST_DB_URL ||
+  'postgresql://hoafinance:change_me@localhost:5432/hoafinance';
+
+class TestDatabase {
+  private pool: Pool | null = null;
+
+  /** Connect to the test database */
+  async connect(): Promise<void> {
+    this.pool = new Pool({ connectionString: TEST_DB_URL, max: 5 });
+    // Verify connectivity
+    const client = await this.pool.connect();
+    try {
+      await client.query('SELECT 1');
+    } finally {
+      client.release();
+    }
+  }
+
+  /** Get a client from the pool */
+  async getClient(): Promise<PoolClient> {
+    if (!this.pool) throw new Error('TestDatabase not connected');
+    return this.pool.connect();
+  }
+
+  /** Execute a query */
+  async query(sql: string, params?: unknown[]) {
+    if (!this.pool) throw new Error('TestDatabase not connected');
+    return this.pool.query(sql, params);
+  }
+
+  /**
+   * Clean up all test-created data.
+   * Removes rows that match the TEST_PREFIX in name/description/memo fields.
+   * This runs within a transaction so it's atomic.
+   */
+  async cleanup(): Promise<void> {
+    if (!this.pool) return;
+    const client = await this.pool.connect();
+    try {
+      await client.query('BEGIN');
+
+      // Clean up test data from tenant schemas.
+      // We look for the e2e test org schema if it exists.
+      const schemas = await client.query(
+        `SELECT schema_name FROM shared.organizations
+         WHERE name LIKE '${TEST_PREFIX}%' OR schema_name = 'e2e_test_hoa'`,
+      );
+
+      for (const row of schemas.rows) {
+        const schema = row.schema_name;
+        // Delete test journal entries, accounts, etc. in tenant schema
+        await client.query(
+          `DELETE FROM "${schema}".journal_entries WHERE memo LIKE $1`,
+          [`${TEST_PREFIX}%`],
+        ).catch(() => {}); // Table may not exist
+        await client.query(
+          `DELETE FROM "${schema}".accounts WHERE name LIKE $1`,
+          [`${TEST_PREFIX}%`],
+        ).catch(() => {});
+      }
+
+      // Clean up test users from shared schema
+      await client.query(
+        `DELETE FROM shared.users WHERE email LIKE 'e2e-%@test.hoaledgeriq.com'`,
+      ).catch(() => {});
+
+      await client.query('COMMIT');
+    } catch (err) {
+      await client.query('ROLLBACK');
+      console.error('Test cleanup failed:', err);
+    } finally {
+      client.release();
+    }
+  }
+
+  /**
+   * Seed the minimum data needed for authenticated test flows:
+   * - A test organization (if not exists)
+   * - A test user with known credentials (if not exists)
+   * - Associates user to org with the given role
+   *
+   * This is idempotent — safe to call multiple times.
+   */
+  async seedTestUser(user: {
+    email: string;
+    password: string;
+    fullName: string;
+    role: string;
+  }): Promise<void> {
+    if (!this.pool) throw new Error('TestDatabase not connected');
+
+    // This is done via API calls in auth.setup.ts instead of direct SQL,
+    // because the backend handles password hashing, schema creation, etc.
+    // This method is available for advanced scenarios that need direct DB access.
+    console.log(`[TestDB] Seed user ${user.email} — use API-based seeding in auth.setup.ts`);
+  }
+
+  /** Disconnect from the database */
+  async disconnect(): Promise<void> {
+    if (this.pool) {
+      await this.pool.end();
+      this.pool = null;
+    }
+  }
+}
+
+export const testDb = new TestDatabase();

tests/fixtures/test-data.ts

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+/**
+ * Shared test data constants for E2E and API tests.
+ *
+ * Credentials match what the DB seed fixture creates.
+ * Money values are in cents (matching the backend convention).
+ */
+
+export const TEST_USERS = {
+  treasurer: {
+    email: process.env.TEST_USER_EMAIL || 'e2e-treasurer@test.hoaledgeriq.com',
+    password: process.env.TEST_USER_PASSWORD || 'TestPass123!',
+    role: 'treasurer',
+    fullName: 'E2E Test Treasurer',
+  },
+  viewer: {
+    email: 'e2e-viewer@test.hoaledgeriq.com',
+    password: 'TestPass123!',
+    role: 'viewer',
+    fullName: 'E2E Test Viewer',
+  },
+} as const;
+
+export const TEST_ORG = {
+  name: 'E2E Test HOA',
+  schemaName: 'e2e_test_hoa',
+} as const;
+
+/** Sample account used for CRUD tests */
+export const SAMPLE_ACCOUNT = {
+  name: 'E2E Operating Checking',
+  accountType: 'asset',
+  fundType: 'operating',
+  number: '1010',
+  description: 'E2E test operating account',
+} as const;
+
+/** Sample journal entry for write-path tests */
+export const SAMPLE_JOURNAL_ENTRY = {
+  date: new Date().toISOString().split('T')[0],
+  memo: 'E2E test journal entry',
+  lines: [
+    { accountId: '', debit: 100_00, credit: 0 },
+    { accountId: '', credit: 100_00, debit: 0 },
+  ],
+} as const;
+
+/** Unique prefix for test-created data — makes cleanup queries simple */
+export const TEST_PREFIX = 'E2E_' as const;