fix(ui): gate copy button on clipboard API support

Only show the copy control when isSecureContext and clipboard.writeText
are available, and style the empty internal hostname state as a readonly
input to match adjacent fields.

tests/Feature/ResourceDetailsVisibilityTest.php

@@ -38,7 +38,9 @@ it('renders copy fields as visible readonly controls with an accessible copy act
     expect($html)
         ->toContain('label class="flex gap-1 items-center mb-1 text-sm font-medium text-black dark:text-white"')
         ->toContain('readonly')
-        ->toContain('input-with-copy-button')
+        ->toContain("canCopy: window.isSecureContext && typeof navigator.clipboard?.writeText === 'function'")
+        ->toContain("x-bind:class=\"{ 'input-with-copy-button': canCopy }\"")
+        ->toContain('x-show="canCopy"')
         ->toContain('copy-button')
         ->toContain('aria-label="Copy to clipboard"')
         ->toContain('title="Copy to clipboard"')