fix(ui): reverse collapsed sidebar footer and polish server filter

Use flex-col-reverse when the sidebar is collapsed, apply the shared
input focus class on the server filter field, and mark the selected
server with a check-circle icon. Update navbar layout tests.

tests/Feature/ResourceHeadingUnifiedNavbarTest.php

@@ -75,7 +75,8 @@ it('places the account menu beside the desktop sidebar toggle while retaining it
 
     expect($navbar)
         ->toContain('<x-top-user-menu sidebar />')
-        ->toContain('Toggle sidebar');
+        ->toContain('Toggle sidebar')
+        ->toContain("collapsed ? 'flex-col-reverse justify-center'");
 
     expect($accountMenu)
         ->toContain("'sidebar' => false")