copy link buttons for item detail and forum post

frontend/src/pages/ItemDetail.tsx

@@ -130,6 +130,16 @@ const ItemDetail: React.FC = () => {
     navigate(`/items/${id}/rent?${params.toString()}`);
   };
 
+  const handleCopyLink = async () => {
+    const shareUrl = `${window.location.origin}/items/${item?.id}`;
+
+    try {
+      await navigator.clipboard.writeText(shareUrl);
+    } catch (err) {
+      console.error("Copy to clipboard failed:", err);
+    }
+  };
+
   const handleDateTimeChange = (field: string, value: string) => {
     setRentalDates((prev) => ({
       ...prev,
@@ -458,7 +468,17 @@ const ItemDetail: React.FC = () => {
                 </div>
               )}
               {/* Item Name */}
-              <h1 className="mb-3">{item.name}</h1>
+              <div className="d-flex align-items-center justify-content-between mb-3">
+                <h1 className="mb-0">{item.name}</h1>
+                <button
+                  className="btn btn-outline-secondary btn-sm"
+                  onClick={handleCopyLink}
+                  aria-label="Copy link to this item"
+                >
+                  <i className="bi bi-link-45deg me-2"></i>
+                  Copy Link
+                </button>
+              </div>
 
               {/* Owner Info */}
               {item.owner && (