feat(4.1-05-07): create frontend components for spare-parts search integration - useItemSearch hook, LoadingModal, ErrorModal with tests

frontend/components/SearchLoadingModal.tsx

@@ -0,0 +1,57 @@
+'use client';
+
+import { useEffect, useState } from 'react';
+
+interface SearchLoadingModalProps {
+  isOpen: boolean;
+  onTimeout?: () => void;
+  maxSeconds?: number;
+}
+
+export function SearchLoadingModal({ isOpen, onTimeout, maxSeconds = 30 }: SearchLoadingModalProps) {
+  const [seconds, setSeconds] = useState(maxSeconds);
+
+  useEffect(() => {
+    if (!isOpen) {
+      setSeconds(maxSeconds);
+      return;
+    }
+
+    const interval = setInterval(() => {
+      setSeconds(prev => {
+        if (prev <= 1) {
+          clearInterval(interval);
+          onTimeout?.();
+          return maxSeconds;
+        }
+        return prev - 1;
+      });
+    }, 1000);
+
+    return () => clearInterval(interval);
+  }, [isOpen, maxSeconds, onTimeout]);
+
+  if (!isOpen) return null;
+
+  return (
+    <div className="fixed inset-0 bg-black/50 flex items-center justify-center z-50">
+      <div className="bg-white rounded-lg p-6 max-w-md shadow-xl">
+        <h2 className="text-xl font-normal mb-4">Searching for specs...</h2>
+        <p className="text-sm text-slate-600 mb-4">This may take up to {maxSeconds} seconds</p>
+
+        <div className="mb-4">
+          <div className="relative h-2 bg-slate-200 rounded-full overflow-hidden">
+            <div
+              className="h-full bg-primary transition-all duration-1000"
+              style={{ width: `${(seconds / maxSeconds) * 100}%` }}
+            />
+          </div>
+        </div>
+
+        <p className="text-center text-sm font-normal">
+          <span className="text-primary text-lg">{seconds}</span> seconds remaining
+        </p>
+      </div>
+    </div>
+  );
+}