fix(decorators): patch container-responsive styles to fix stale container queries and add customElement wrapper that sets .is and warns on class/tag mismatch

ts/decorators.customelement.ts

@@ -0,0 +1,25 @@
+import { customElement as litCustomElement } from 'lit/decorators/custom-element.js';
+
+const camelToKebab = (name: string) =>
+  name.replace(/([a-z])([A-Z])/g, '$1-$2').toLowerCase();
+
+export function customElement(tagName: string) {
+  return (classOrTarget: any, context?: any) => {
+    // Set .is so that other decorators and utilities can read the tag name
+    classOrTarget.is = tagName;
+
+    // Warn if class name convention doesn't match the tag
+    if (classOrTarget.name) {
+      const derived = camelToKebab(classOrTarget.name);
+      if (derived !== tagName) {
+        console.warn(
+          `[dees-element] Class "${classOrTarget.name}" kebab-cases to "${derived}" but tag is "${tagName}". ` +
+          `Container queries use .is ("${tagName}").`
+        );
+      }
+    }
+
+    // Delegate to Lit's original decorator
+    return litCustomElement(tagName)(classOrTarget, context);
+  };
+}