feat: 实现 Mini Game AI 工具平台

基于 Next.js 15、React 19 和 TypeScript 构建面向小游戏开发者的 AI 赋能工具平台。

主要功能：
- 首页：包含 Hero、功能展示、优势介绍、定价和 CTA 区域
- 三大核心工具：视频转序列帧、图片压缩、音频压缩
- 响应式布局：包含顶部导航、页脚和侧边栏
- 文件上传：支持拖拽上传，使用 react-dropzone
- 进度追踪：实时显示上传和处理进度
- 可配置工具：每个工具都支持自定义参数配置
- 结果预览：支持下载处理后的文件
- 4K 优化：针对大屏幕优化的响应式设计
- API 路由：文件上传和处理的模拟实现

技术栈：
- Next.js 15 (App Router)
- React 19
- TypeScript (严格模式)
- Tailwind CSS（自定义 4K 断点）
- shadcn/ui 组件库
- Framer Motion 动画
- Zustand 状态管理

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

src/components/layout/Sidebar.tsx

@@ -0,0 +1,105 @@
+"use client";
+
+import Link from "next/link";
+import { usePathname } from "next/navigation";
+import { motion } from "framer-motion";
+import {
+  Video,
+  Image,
+  Music,
+  Sparkles,
+  LayoutDashboard,
+  CreditCard,
+  Settings,
+} from "lucide-react";
+import { cn } from "@/lib/utils";
+
+const sidebarNavItems = [
+  {
+    title: "Dashboard",
+    items: [
+      { name: "Overview", href: "/dashboard", icon: LayoutDashboard },
+    ],
+  },
+  {
+    title: "Tools",
+    items: [
+      { name: "Video to Frames", href: "/tools/video-frames", icon: Video },
+      { name: "Image Compression", href: "/tools/image-compress", icon: Image },
+      { name: "Audio Compression", href: "/tools/audio-compress", icon: Music },
+    ],
+  },
+  {
+    title: "AI Tools",
+    items: [
+      { name: "AI Image", href: "/tools/ai-image", icon: Sparkles },
+      { name: "AI Audio", href: "/tools/ai-audio", icon: Sparkles },
+    ],
+  },
+  {
+    title: "Account",
+    items: [
+      { name: "Pricing", href: "/pricing", icon: CreditCard },
+      { name: "Settings", href: "/settings", icon: Settings },
+    ],
+  },
+];
+
+interface SidebarProps {
+  className?: string;
+}
+
+export function Sidebar({ className }: SidebarProps) {
+  const pathname = usePathname();
+
+  return (
+    <aside
+      className={cn(
+        "fixed left-0 top-16 z-40 h-[calc(100vh-4rem)] w-64 border-r border-border/40 bg-background/95 backdrop-blur",
+        className
+      )}
+    >
+      <div className="h-full overflow-y-auto py-6 pr-4">
+        <nav className="space-y-8 px-4">
+          {sidebarNavItems.map((section) => (
+            <div key={section.title}>
+              <h3 className="mb-4 px-2 text-xs font-semibold uppercase tracking-wider text-muted-foreground">
+                {section.title}
+              </h3>
+              <ul className="space-y-1">
+                {section.items.map((item) => {
+                  const Icon = item.icon;
+                  const isActive = pathname === item.href || pathname?.startsWith(item.href + "/");
+
+                  return (
+                    <li key={item.name}>
+                      <Link
+                        href={item.href}
+                        className={cn(
+                          "group flex items-center rounded-lg px-3 py-2 text-sm font-medium transition-all",
+                          isActive
+                            ? "bg-primary/10 text-primary"
+                            : "text-muted-foreground hover:bg-accent hover:text-accent-foreground"
+                        )}
+                      >
+                        <Icon className={cn("mr-3 h-4 w-4", isActive ? "text-primary" : "")} />
+                        <span className="flex-1">{item.name}</span>
+                        {isActive && (
+                          <motion.div
+                            layoutId="activeIndicator"
+                            className="h-4 w-1 rounded-full bg-primary"
+                            transition={{ type: "spring", stiffness: 300, damping: 30 }}
+                          />
+                        )}
+                      </Link>
+                    </li>
+                  );
+                })}
+              </ul>
+            </div>
+          ))}
+        </nav>
+      </div>
+    </aside>
+  );
+}