feat(shorts): cinematic v2 visual design + synced karaoke captions

- Fix critical bug: scenes were stacked without <Sequence> — every segment
  rendered simultaneously, last scene covering the whole video (root cause
  of 'too simple/ugly' visual)
- Scene variety: kinetic word-by-word title (hook), karaoke caption card,
  big-number stat scene (auto-detected: $12B, 65%, 3.2M), CTA center
- Karaoke captions synced to TTS: edge-tts SentenceBoundary timing via new
  scripts/tts-words.py (mp3 + sentences.json per segment); active sentence
  bright, others dimmed
- Rich background per scene: 4 color palettes (indigo/pink, cyan/teal,
  purple/pink, orange/red), drifting orbs, dot grid, ken-burns motion
- Real fonts: @fontsource Inter 700 + Montserrat 800 (display/captions)
- Glass card captions, progress bar per-scene, safe zone 900x1400
- Word-boundary truncation for stat labels (no mid-word cuts)
- Perf kept: no blur/SVG-noise (software renderer); ~2 min per 32s short

package.json

@@ -15,6 +15,8 @@
   },
   "dependencies": {
     "@auth/prisma-adapter": "^1.6.0",
+    "@fontsource/inter": "^5.3.0",
+    "@fontsource/montserrat": "^5.3.0",
     "@prisma/client": "^6.19.2",
     "@remotion/cli": "^4.0.527",
     "@remotion/google-fonts": "^4.0.527",