feat(ui): unify resource headings with responsive action menus

Add responsive overflow handling and dedicated action menus for application,
service, database, and server headings, while improving upgrade and email
settings flows and returning 404s for missing deployment environments.

tests/Feature/ServiceDatabaseVerticalNavigationTest.php

@@ -30,10 +30,9 @@ it('matches application action bar behavior for services and databases', functio
 
     foreach ([$service, $database] as $heading) {
         expect($heading)
-            ->toContain('xl:fixed xl:top-14 xl:right-4')
+            ->toContain('@teleport(\'#resource-action-hud-slot\')')
             ->toContain('xl:w-auto')
-            ->toContain('Actions')
-            ->toContain('listbox-panel top-full! right-0! left-auto!')
+            ->toContain('<x-resource-heading-overflow')
             ->not->toContain('hidden lg:block lg:h-12');
     }