使用 qwen 进行语音识别，加入 tag

Co-authored-by: Copilot <copilot@github.com>

app/components/SearchBox.tsx

@@ -1,10 +1,10 @@
 "use client";
 
-import { useState } from "react";
-import { useRouter } from "next/navigation";
 import { Search } from "lucide-react";
+import { useRouter } from "next/navigation";
+import { useState } from "react";
 
-export default function SearchBox() {
+export default function SearchBox({ tag }: { tag?: string | null }) {
   const [query, setQuery] = useState("");
   const router = useRouter();
 
@@ -12,7 +12,9 @@ export default function SearchBox() {
     e.preventDefault();
     const trimmed = query.trim();
     if (!trimmed) return;
-    router.push(`/search?q=${encodeURIComponent(trimmed)}`);
+    const params = new URLSearchParams({ q: trimmed });
+    if (tag) params.set("tag", tag);
+    router.push(`/search?${params.toString()}`);
   };
 
   return (