Add long_horizon/personalized tasks + GitHub-hosted training curves

Implement all audit fixes: base class, curves, README, code quality

Remove show_download_button — unsupported in this Gradio version

Fix training curves: switch gr.Plot → gr.Image with PNG bytes

Fix /web 404: guard matplotlib import and harden Gradio mount

Update training curves with real Colab data

Add Training Results tab with GRPO reward curves for all 3 agents

Overhaul UI + README for submission

Fix pipeline UI: total regex case-insensitive, deduplicate invoice IDs

Wire trained LoRA agents into pipeline demo UI

Add Multi-Agent Pipeline tab — live 5-agent episode trace

Add 3 novelty upgrades: predictive Regulator, compound fraud, confidence calibration

Add multi-agent architecture: Regulator, biased Generator, Auditor rewards

Add Gradio web UI mounted at /web for interactive agent testing