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)

lib/renderer.js

@@ -0,0 +1,35 @@
+import { execFile } from 'child_process';
+import { promisify } from 'util';
+import path from 'path';
+import fs from 'fs';
+
+const execFileAsync = promisify(execFile);
+
+export async function renderVideo(compDir, outputFile, config, onProgress) {
+  const { format = '9:16', duration = 75 } = config;
+  const [w, h] = format === '9:16' ? [1080, 1920] : format === '1:1' ? [1080, 1080] : [1920, 1080];
+  onProgress?.(0);
+
+  const meta = { duration, width: w, height: h, fps: 30 };
+  fs.writeFileSync(path.join(compDir, 'meta.json'), JSON.stringify(meta, null, 2));
+
+  return new Promise((resolve, reject) => {
+    const proc = execFile('npx', [
+      'hyperframes', 'render',
+      '--output', outputFile,
+      '--width', String(w),
+      '--height', String(h),
+      '--fps', '30',
+    ], { cwd: compDir, maxBuffer: 500 * 1024 * 1024 });
+
+    proc.stdout?.on('data', (d) => {
+      const m = d.toString().match(/frame\s+(\d+)\/(\d+)/i);
+      if (m) onProgress?.(parseInt(m[1]) / parseInt(m[2]));
+    });
+    proc.stderr?.on('data', (d) => process.stderr.write(d));
+    proc.on('close', (code) => {
+      if (code === 0) { onProgress?.(1); resolve(outputFile); }
+      else reject(new Error(`HyperFrames exited with code ${code}`));
+    });
+  });
+}