fix(download): 统一下载路由并更新全站相关链接

创建旧 /download 路径的重定向页面以兼容老链接
更新全站所有指向旧下载页的导航和内部链接
修复首页跑马灯的文字错别字（创绘基金→创汇基金）
调整启动器页面按钮布局与样式，添加下载图标

app/download/page.tsx

@@ -0,0 +1,6 @@
+import { redirect } from "next/navigation";
+
+/** /download old path compat: redirect to /launcher/download */
+export default function OldDownloadRedirect() {
+  redirect("/launcher/download");
+}

app/launcher/page.tsx

@@ -1,7 +1,7 @@
 import { FlickeringGrid } from "@/components/ui/flickering-grid";
 import { Button } from "@/components/ui/button";
 import { Badge } from "@/components/ui/badge";
-import { HammerIcon, ArrowUpRight, Rocket, Layers, Palette, Users, Cpu, Shield } from "lucide-react";
+import { HammerIcon, ArrowUpRight, Download, Rocket, Layers, Palette, Users, Cpu, Shield } from "lucide-react";
 import Link from "next/link";
 
 const features = [
@@ -71,14 +71,20 @@ export default function LauncherPage() {
             Koring Launcher 是一款面向国际版 Minecraft 的现代化启动器，
             提供流畅的版本管理、多账户支持与丰富的个性化选项。
           </p>
-          <div className="flex items-center gap-3 pt-2">
+          <div className="flex flex-wrap items-center justify-center gap-3 pt-2">
             <Button size="lg" asChild>
+              <Link href="/launcher/download">
+                <Download className="size-4" />
+                立即下载
+              </Link>
+            </Button>
+            <Button variant="outline" size="lg" asChild>
               <Link href="https://github.com/lingke-net" target="_blank">
                 前往 GitHub
                 <ArrowUpRight className="size-4" />
               </Link>
             </Button>
-            <Button variant="outline" size="lg" asChild>
+            <Button variant="ghost" size="lg" asChild>
               <Link href="/launcher/join-beta">
                 获取测试版
               </Link>

app/page.tsx

@@ -71,7 +71,7 @@ export default function HomePage() {
               <MarqueeItem className="w-32">Play服务</MarqueeItem>
               <MarqueeItem className="w-32">木柴.空间</MarqueeItem>
               <MarqueeItem className="w-32">SkinEditer</MarqueeItem>
-              <MarqueeItem className="w-32">创绘基金</MarqueeItem>
+              <MarqueeItem className="w-32">创汇基金</MarqueeItem>
             </MarqueeContent>
           </Marquee>
         </div>

app/thanks/thanks-view.tsx

@@ -165,7 +165,7 @@ export function ThanksView() {
                 重新下载
               </Button>
               <Button variant="outline" size="lg" asChild>
-                <Link href="/download">
+                <Link href="/launcher/download">
                   返回下载中心
                   <ArrowRight className="size-4" />
                 </Link>
@@ -185,7 +185,7 @@ export function ThanksView() {
             </p>
             <div className="mt-7">
               <Button variant="outline" size="lg" asChild>
-                <Link href="/download">
+                <Link href="/launcher/download">
                   返回下载中心
                   <ArrowRight className="size-4" />
                 </Link>

layout/header.tsx

@@ -13,7 +13,7 @@ const navItems = [
     textColor: "#fff",
     links: [
       { label: "Koring Launcher", href: "/launcher", ariaLabel: "Koring Launcher" },
-      { label: "下载中心", href: "/download", ariaLabel: "下载中心" },
+      { label: "下载中心", href: "/launcher/download", ariaLabel: "下载中心" },
       { label: "Sanshe Play", href: "https://docs.play.lenjing.work", ariaLabel: "Sanshe Play" },
     ],
   },