test(browser): expand config coverage and shared helpers

Add BrowserTestHelpers and configuration/deploy browser tests for apps,
databases, services, and Livewire toggles. Refactor existing browser
suites onto shared seed/login helpers, soft-skip onboarding, and null
broadcasting so host-side Pest runs avoid docker DNS.

phpunit.xml

@@ -25,6 +25,8 @@
     <env name="QUEUE_CONNECTION" value="sync" force="true"/>
     <env name="SESSION_DRIVER" value="array" force="true"/>
     <env name="NIGHTWATCH_ENABLED" value="false"/>
+    <!-- Host-side Pest browser runs cannot resolve docker DNS (coolify-realtime). -->
+    <env name="BROADCAST_DRIVER" value="null" force="true"/>
     <!-- The v5 bootstrap endpoint refuses to queue without a Flux URL; tests
          that exercise the unconfigured path blank it via Config::set. -->
     <env name="COOLIFY_COOLD_FLUX_URL" value="http://flux.testing:6443" force="true"/>