[CI] Playwright improvements (#9395)

* Allow port 4173 (vite preview)

* Change 'base' attr based on vite command

* Allow api_host to be specified separately

* Harden API host functionality

* Adjust server selections

* Cleanup vite.config.ts

* Adjust playwright configuration

- Allow to run in "production" mode
- Builds the code first
- Runs only the backend web server
- Not suitable for coverage

* Tweak github actions

* Tweak QC file

* Reduce number of steps

* Tweak CI file

* Fix typo

* Ensure translation before build

* Fix hard-coded test

* Test tweaks

* uncomment

* Revert some changes

* Run with gunicorn, single worker

* Reduce log output in DEBUG mode

* Update deps

* Add global-setup func

* Fix for .gitignore file

* Cached auth state

* Tweak login func

* Updated tests

* Enable parallel workers again

* Simplify config

* Try with a single worker again

* Single retry mode

* Run auth setup first

- Prevent issues with parallel test doing login

* Improve test setup process

* Tweaks

* Bump to 3 workers

* Tweak playwright settings

* Revert change

* Revert change

src/frontend/tests/pages/pui_dashboard.spec.ts

@@ -1,9 +1,9 @@
 import { test } from '../baseFixtures.js';
-import { doQuickLogin } from '../login.js';
+import { doCachedLogin } from '../login.js';
 import { setPluginState } from '../settings.js';
 
-test('Dashboard - Basic', async ({ page }) => {
-  await doQuickLogin(page);
+test('Dashboard - Basic', async ({ browser }) => {
+  const page = await doCachedLogin(browser);
 
   await page.getByText('Use the menu to add widgets').waitFor();
 
@@ -35,7 +35,7 @@ test('Dashboard - Basic', async ({ page }) => {
   await page.getByLabel('dashboard-accept-layout').click();
 });
 
-test('Dashboard - Plugins', async ({ page, request }) => {
+test('Dashboard - Plugins', async ({ browser, request }) => {
   // Ensure that the "SampleUI" plugin is enabled
   await setPluginState({
     request,
@@ -43,7 +43,7 @@ test('Dashboard - Plugins', async ({ page, request }) => {
     state: true
   });
 
-  await doQuickLogin(page);
+  const page = await doCachedLogin(browser);
 
   // Add a dashboard widget from the SampleUI plugin
   await page.getByLabel('dashboard-menu').click();