Add animation keyframes for grid and shimmer effects, implement mouse position tracking for dynamic background, and create direct download API for video/audio files. Update types for download requests and responses.

lib/types.ts

@@ -9,10 +9,34 @@ export interface DownloadRequest {
   formatType: FormatType;
 }
 
+export interface DirectDownloadRequest {
+  id: string;
+  format: VideoFormat | AudioFormat;
+  formatType: FormatType;
+}
+
+export interface DownloadResponse {
+
+  success: boolean;
+  downloadUrl?: string;
+  filename?: string;
+  filePath?: string;
+  error?: string;
+  videoInfo?: VideoInfo;
+}
+
+
+export interface DirectDownloadRequest {
+  videoId: string;
+  format: VideoFormat | AudioFormat;
+  formatType: FormatType;
+}
+
 export interface DownloadResponse {
   success: boolean;
   downloadUrl?: string;
   filename?: string;
+  filePath?: string;
   error?: string;
   videoInfo?: VideoInfo;
 }

lib/utils.ts

@@ -28,3 +28,8 @@ export function extractYouTubeId(url: string): string | null {
   
   return null;
 }
+
+// Validate a bare YouTube video ID (11 chars, URL-safe)
+export function isValidYouTubeId(id: string): boolean {
+  return /^[A-Za-z0-9_-]{11}$/.test(id);
+}

lib/youtube.ts

@@ -1,6 +1,6 @@
 import { exec } from 'child_process';
 import { promisify } from 'util';
-import { writeFile, readFile, unlink, mkdir, copyFile } from 'fs/promises';
+import { readFile, unlink, mkdir, copyFile } from 'fs/promises';
 import { existsSync } from 'fs';
 import path from 'path';
 import type { VideoInfo, FormatOption, DownloadRequest, DownloadResponse } from './types';