feat: add Flux image generation function for Open WebUI

- Add flux_image_gen.py manifold function for Flux.1 Schnell
- Auto-mount functions via Docker volume (./functions:/app/backend/data/functions:ro)
- Add comprehensive setup guide in FLUX_SETUP.md
- Update CLAUDE.md with Flux integration documentation
- Infrastructure as code approach - no manual import needed

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

CLAUDE.md

@@ -476,11 +476,28 @@ AI infrastructure with Open WebUI, Crawl4AI, and dedicated PostgreSQL with pgvec
 4. Use web search feature for current information
 5. Integrate with n8n workflows for automation
 
+**Flux Image Generation** (`functions/flux_image_gen.py`):
+Open WebUI function for generating images via Flux.1 Schnell on RunPod GPU:
+- Manifold function adds "Flux.1 Schnell (4-5s)" model to Open WebUI
+- Routes requests through LiteLLM → Orchestrator → RunPod Flux
+- Generates 1024x1024 images in 4-5 seconds
+- Returns images as base64-encoded markdown
+- Configuration via Valves (API base, timeout, default size)
+- **Automatically loaded via Docker volume mount** (`./functions:/app/backend/data/functions:ro`)
+
+**Deployment**:
+- Function file tracked in `ai/functions/` directory
+- Automatically available after `pnpm arty up -d ai_webui`
+- No manual import required - infrastructure as code
+
+See `ai/FLUX_SETUP.md` for detailed setup instructions and troubleshooting.
+
 **Integration Points**:
 - **n8n**: Workflow automation with AI tasks (scraping, RAG ingestion, webhooks)
 - **Mattermost**: Can send AI-generated notifications via webhooks
 - **Crawl4AI**: Internal API for advanced web scraping
 - **Claude API**: Primary LLM provider via Anthropic
+- **Flux via RunPod**: Image generation through orchestrator (GPU server)
 
 **Future Enhancements**:
 - GPU server integration (IONOS A10 planned)