refactor(components): convert const to reactive where appropriate

- Inline class assignments to avoid script-level clutter
- Ignore a11y-missing-attribute instead of redundant href

src/components/ComposedModal/ModalBody.svelte

@@ -6,14 +6,12 @@
   export let style = undefined;
 
   import { cx } from '../../lib';
-
-  const _class = cx('--modal-content', hasForm && '--modal-content--with-form', className);
 </script>
 
 <div
   tabindex={hasScrollingContent ? '0' : undefined}
   role={hasScrollingContent ? 'region' : undefined}
-  class={_class}
+  class={cx('--modal-content', hasForm && '--modal-content--with-form', className)}
   {style}>
   <slot />
 </div>