CLI: -s/--save FILE writes selected generation options to a JSON config
and exits; -c/--config FILE loads them as defaults (command-line args
still override, via a two-phase parse).

Web UI: "Save config" button writes the current form options to a file
on the server (relative paths land in the output dir, absolute paths as-is)
via a new /save-config endpoint. Web- and CLI-saved configs are
interchangeable (shared CONFIG_FIELDS / canonical mapping).
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

- Character profiles: extract from images/video or generate from text prompt;
  up to 6 profiles per image/video generation via IP-Adapter conditioning
- Environment profiles: same multi-slot system for scene/background conditioning
- Multi-character dialog for video: per-character TTS synthesis with voice profile
  support, sequential or manual timing, ffmpeg amix, Wav2Lip/SadTalker lip sync
- 2D↔3D conversion: image/video to stereo/anaglyph/depth/mesh and back;
  text/image to 3D model (GLB); turntable video rendering
- Generation archive: auto-save all outputs with configurable retention and
  hourly cleanup; browse/delete from web UI and API
- Voice profile enhancements: extract from video, PATCH update, GET by name;
  TTS endpoint now accepts voice_profile for F5-TTS cloning
- Image generation progress tracking via GET /v1/images/progress
- Web Studio: Profiles tab (Characters, Environments, Voices) with full managers;
  multi-slot character/environment selectors in all panels; character dialog
  section in all video panels; archive settings in Settings page
- Fix: Profiles tab sub-tab switching now correctly updates the content panel
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>