Added qwen to serve as an repair agent.

.setup-templates/templates/hooks/use-media.ts

@@ -0,0 +1,18 @@
+// ── useMedia Hook ─────────────────────────────────────────────────────
+// Auto-generated by self-healing setup. Edit to customize.
+
+import { useState, useEffect } from "react";
+
+export function useMedia(query: string): boolean {
+  const [matches, setMatches] = useState(false);
+
+  useEffect(() => {
+    const mql = window.matchMedia(query);
+    setMatches(mql.matches);
+    const handler = (e: MediaQueryListEvent) => setMatches(e.matches);
+    mql.addEventListener("change", handler);
+    return () => mql.removeEventListener("change", handler);
+  }, [query]);
+
+  return matches;
+}