fix(ui): use listbox for domain redirects and key terminal canvases

Replace the service domain www-redirect native select with the shared
listbox (htmlId for stable trigger IDs) and allow dropdown overflow.
Key terminal target/session canvases for Livewire DOM branches, and
enable terminal browser debug via ?terminal-debug= plus theme logs.

tests/v4/Browser/ServiceConfigurationTest.php

@@ -111,8 +111,9 @@ it('renders an automatically added redirect counterpart without reloading', func
     $page = visit("{$base}/domains")
         ->assertSee('https://web.example.com');
 
-    $selector = '#service-domain-redirect-'.$this->serviceApplication->id;
-    $page->select($selector, 'www')
+    $selector = '#service-domain-redirect-'.$this->serviceApplication->id.'-trigger';
+    $page->click($selector)
+        ->click('Redirect to www')
         ->wait(3);
 
     $this->serviceApplication->refresh();