Backend:
- Add batch_id column to Post model (UUID, groups posts from same generation)
- Set batch_id in /generate endpoint for all posts in same request
Frontend:
- ContentArchive: group posts by batch_id into single cards with platform tabs
- Character name at top, platform tabs below, status badge, text preview
- Click platform tab to switch between variants of same content
- ConfirmModal: render via React portal to document.body for true fullscreen overlay
- Add box-shadow and higher z-index for better visual separation
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Add 'brief' field to GenerateContentRequest schema
- Pass brief from router to generate_post_text service
- Inject brief as mandatory instructions in LLM prompt with highest priority
- Return structured error when LLM provider/API key not configured
- Show dedicated warning banner with link to Settings when API key missing
Fixes: content ignoring editorial brief, unhelpful API key error messages
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
