0.9.0

release: SceneForge Studio 0.9.0 — friendlier editing

Fixes from the 0.8.0 Windows test:
- Beats menu text no longer clipped; track names stay on one line ("Music & SFX" for A3)
- the editor can no longer scroll sideways (left edge was cut off)
- waveforms on A2 clip sound and A3-A8 timeline clips

Usability:
- Typewriter in its own box (switch, speed, timing, sound, volume, preview)
  with GET /api/scenes/{id}/typewriter-preview
- Effects tab (Split toning -> Look presets) sorted into collapsible groups

Roadmap items:
- auto-ducking for A3-A8 clips (audio_clips[].duck, sidechain on scene audio)
- restore points (automatic + named; restore opens a copy)
- "Try a sample project" (generated media, POST /api/sample-project)
- caption translation to English / bilingual with Local Whisper
- title templates (lower third, intro, outro, chapter, quote)

CI: actions v6 (Node 24), checks pinned to ubuntu-24.04, new test_090_features.py.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01NxBsZAuJAXTo16eK2ZjqRz