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/types/index.ts

@@ -0,0 +1,142 @@
+/**
+ * File types
+ */
+
+export interface UploadedFile {
+  id: string;
+  file: File;
+  name: string;
+  size: number;
+  type: string;
+  url?: string;
+  uploadedAt: Date;
+}
+
+export interface ProcessedFile {
+  id: string;
+  originalFile: UploadedFile;
+  processedUrl: string;
+  metadata: ProcessMetadata;
+  createdAt: Date;
+}
+
+/**
+ * Processing types
+ */
+
+export type ProcessStatus = "idle" | "uploading" | "processing" | "completed" | "failed";
+
+export interface ProcessMetadata {
+  format?: string;
+  quality?: number;
+  bitrate?: number;
+  fps?: number;
+  resolution?: string;
+  duration?: number;
+  frames?: number;
+  compressionRatio?: number;
+}
+
+export interface ProcessingResult {
+  success: boolean;
+  fileUrl?: string;
+  filename?: string;
+  metadata?: ProcessMetadata;
+  error?: string;
+}
+
+export interface ProcessingProgress {
+  status: ProcessStatus;
+  progress: number; // 0-100
+  message: string;
+  error?: string;
+}
+
+/**
+ * Tool types
+ */
+
+export type ToolType = "video-frames" | "image-compress" | "audio-compress" | "ai-image" | "ai-audio";
+
+export interface ToolConfig {
+  type: ToolType;
+  name: string;
+  description: string;
+  icon: string;
+  supportedFormats: string[];
+  maxSize: number;
+  features: string[];
+  isPremium?: boolean;
+}
+
+/**
+ * User types (Phase 6)
+ */
+
+export interface User {
+  id: string;
+  email: string;
+  name: string;
+  avatar?: string;
+  plan: "free" | "pro" | "enterprise";
+  quota: UserQuota;
+  createdAt: Date;
+}
+
+export interface UserQuota {
+  used: number;
+  limit: number;
+  resetDate: Date;
+}
+
+/**
+ * API types
+ */
+
+export interface ApiResponse<T> {
+  success: boolean;
+  data?: T;
+  error?: string;
+  message?: string;
+}
+
+export interface UploadResponse {
+  fileId: string;
+  fileUrl: string;
+  metadata: {
+    size: number;
+    type: string;
+    name: string;
+  };
+}
+
+/**
+ * Tool configuration types
+ */
+
+export interface VideoFramesConfig {
+  fps: number;
+  format: "png" | "jpeg" | "webp";
+  quality: number;
+  startTime?: number;
+  endTime?: number;
+  width?: number;
+  height?: number;
+}
+
+export interface ImageCompressConfig {
+  quality: number;
+  format: "original" | "jpeg" | "png" | "webp";
+  resize?: {
+    width?: number;
+    height?: number;
+    fit: "contain" | "cover" | "fill";
+  };
+}
+
+export interface AudioCompressConfig {
+  bitrate: number;
+  format: "mp3" | "aac" | "ogg" | "flac";
+  sampleRate: number;
+  channels: number;
+}