Expand e2e auth coverage, Vitest CI, and shared URL defaults

Wire viewer-frontend Vitest into Gitea Actions, centralize DEV base URLs
in env-defaults.json, expand playkit API catalog specs, and land auth/mail
flows plus verify-email public-host redirect and idle-logout e2e hooks.

e2e/fixtures.ts

@@ -1,31 +1,23 @@
 import { test as base, expect } from '@playwright/test';
 import {
   createPlaykitRuntime,
-  MailtrapClient,
+  createMailInbox,
   type PlaykitFixtures,
+  type MailInbox,
 } from '@levkin/playkit';
+import { playkitEnvFromProcess } from './env-defaults';
 import { LoginPage } from './pages/LoginPage';
 import { AccountMenu } from './pages/AccountMenu';
+import { RegisterPage } from './pages/RegisterPage';
 
-const runtime = createPlaykitRuntime({
-  ...process.env,
-  PLAYKIT_PROJECT: process.env.PLAYKIT_PROJECT || 'punimtag',
-  PLAYKIT_ENV: process.env.PLAYKIT_ENV || 'dev',
-  PLAYKIT_API_BASE_URL:
-    process.env.PLAYKIT_API_BASE_URL ||
-    process.env.API_BASE_URL ||
-    'http://10.0.10.121:8000',
-  PLAYKIT_BASE_URL:
-    process.env.PLAYKIT_BASE_URL ||
-    process.env.BASE_URL ||
-    'https://punimtagdev.levkin.ca',
-});
+const runtime = createPlaykitRuntime(playkitEnvFromProcess());
 
 type PunimtagFixtures = PlaykitFixtures & {
   loginPage: LoginPage;
   accountMenu: AccountMenu;
+  registerPage: RegisterPage;
   e2eCredentials: { email: string; password: string } | null;
-  mailtrap: MailtrapClient | null;
+  mail: MailInbox | null;
 };
 
 export const test = base.extend<PunimtagFixtures>({
@@ -38,6 +30,8 @@ export const test = base.extend<PunimtagFixtures>({
     use(new LoginPage(page, playkitConfig.baseUrl)),
   accountMenu: async ({ page, playkitConfig }, use) =>
     use(new AccountMenu(page, playkitConfig.baseUrl)),
+  registerPage: async ({ page, playkitConfig }, use) =>
+    use(new RegisterPage(page, playkitConfig.baseUrl)),
 
   e2eCredentials: async ({}, use) => {
     const email = process.env.E2E_ADMIN_EMAIL || process.env.E2E_EMAIL || '';
@@ -45,10 +39,8 @@ export const test = base.extend<PunimtagFixtures>({
     await use(email && password ? { email, password } : null);
   },
 
-  mailtrap: async ({ playkitLog }, use) => {
-    await use(
-      MailtrapClient.fromEnv(process.env, playkitLog.child({ component: 'mailtrap' })),
-    );
+  mail: async ({ playkitLog }, use) => {
+    await use(createMailInbox(process.env, playkitLog.child({ component: 'mail' })));
   },
 });