feat: init Dee Video Studio — HyperFrames cloud render for testimonial/teaser/trailer videos

- 4 workflows: testimonial (75s), teaser (30s), trailer (60s), community (60s)
- 6 royalty-free Pixabay music tracks auto-selected by workflow
- WebSocket real-time render progress
- Dark-mode Studio UI with drag-drop upload
- HuggingFace Docker Space ready (port 7860)

scripts/download-music.js

@@ -0,0 +1,32 @@
+import { createWriteStream, mkdirSync, existsSync, writeFileSync } from 'fs';
+import { pipeline } from 'stream/promises';
+import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+const LIB = path.join(__dirname, '..', 'music', 'library');
+mkdirSync(LIB, { recursive: true });
+
+const TRACKS = [
+  { file: 'corporate-motivation.mp3', url: 'https://cdn.pixabay.com/download/audio/2022/05/27/audio_1808fbf07a.mp3', mood: 'corporate', bpm: 120, tags: ['corporate','testimonial','professional'] },
+  { file: 'inspiring-cinematic.mp3',  url: 'https://cdn.pixabay.com/download/audio/2023/02/28/audio_a74ea30b0d.mp3', mood: 'cinematic', bpm: 90,  tags: ['cinematic','trailer','emotional'] },
+  { file: 'upbeat-community.mp3',     url: 'https://cdn.pixabay.com/download/audio/2022/08/02/audio_2dde668d05.mp3', mood: 'upbeat',   bpm: 128, tags: ['community','energetic'] },
+  { file: 'warm-documentary.mp3',     url: 'https://cdn.pixabay.com/download/audio/2023/01/30/audio_16b3ef0928.mp3', mood: 'warm',     bpm: 75,  tags: ['documentary','story','heartfelt'] },
+  { file: 'tech-corporate.mp3',       url: 'https://cdn.pixabay.com/download/audio/2022/11/22/audio_4d566a5081.mp3', mood: 'tech',     bpm: 110, tags: ['ai','tech','modern'] },
+  { file: 'action-sport.mp3',         url: 'https://cdn.pixabay.com/download/audio/2022/06/08/audio_c8a2c5a45d.mp3', mood: 'energetic',bpm: 145, tags: ['viral','energetic','teaser'] },
+];
+
+for (const track of TRACKS) {
+  const dest = path.join(LIB, track.file);
+  writeFileSync(path.join(LIB, track.file.replace(/\.mp3$/, '.json')),
+    JSON.stringify({ ...track, license: 'Pixabay License — free commercial use' }, null, 2));
+  if (existsSync(dest)) { console.log(`✓ ${track.file} (cached)`); continue; }
+  console.log(`⬇ ${track.file}...`);
+  try {
+    const res = await fetch(track.url);
+    if (!res.ok) { console.warn(`  ✗ HTTP ${res.status}`); continue; }
+    await pipeline(res.body, createWriteStream(dest));
+    console.log(`  ✓ done`);
+  } catch(e) { console.warn(`  ✗ ${e.message}`); }
+}
+console.log('Music library ready.');