feat: webowa wersja Video & Sound Downloader Pro (NestJS + React)

Odwzorowanie desktopowego v6.5.6: tryby MP3/MP4/PLAYLISTA/FACEBOOK,
jakość/format, napisy, log na żywo (SSE), STOP. Docker + Gitea CI/CD,
deploy na videodownloader.naurecki.pl.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

apps/api/src/jobs/dto.ts

@@ -0,0 +1,31 @@
+import { IsBoolean, IsIn, IsOptional, IsString, MaxLength } from 'class-validator';
+
+export type JobMode = 'mp3' | 'mp4' | 'playlist' | 'facebook';
+
+export class ProbeDto {
+  @IsString()
+  @MaxLength(2048)
+  url!: string;
+}
+
+export class CreateJobDto {
+  @IsString()
+  @MaxLength(2048)
+  url!: string;
+
+  @IsIn(['mp3', 'mp4', 'playlist', 'facebook'])
+  mode!: JobMode;
+
+  // Token formatu zależny od trybu:
+  //  mp3      -> '320' | '256' | '192' | '128'   (kbps)
+  //  mp4/fb   -> '2160' | '1440' | '1080' | '720' | '480' | 'best'
+  //  playlist -> 'video-1080' | 'video-720' | 'audio-320'
+  @IsOptional()
+  @IsString()
+  @MaxLength(32)
+  format?: string;
+
+  @IsOptional()
+  @IsBoolean()
+  subtitles?: boolean;
+}