fix: redeem item status display 上架中/未上架 with indicators

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

frontend/src/app/admin-redeem/page.tsx

@@ -294,7 +294,7 @@ export default function AdminRedeemPage() {
               checked={form.is_active}
               onChange={(e) => setForm((prev) => ({ ...prev, is_active: e.target.checked }))}
             />
-            {tx("启用", "Enabled")}
+            {tx("上架", "Listed")}
           </label>
           <label className="flex items-center gap-2 text-sm">
             <input
@@ -363,7 +363,7 @@ export default function AdminRedeemPage() {
               </p>
               <p className="text-xs text-zinc-600">
                 {tx("状态：", "Status: ")}
-                {item.is_active ? tx("启用", "Enabled") : tx("下架", "Disabled")}
+                {item.is_active ? `🟢 ${tx("上架中", "Listed")}` : `🔴 ${tx("未上架", "Unlisted")}`}
                 {" · "}
                 {tx("范围：", "Scope: ")}
                 {item.is_global ? tx("全局", "Global") : tx("非全局", "Non-global")}