sync: docs, training page fixes, OpenEnv SFT demo notebook

sync: docs, training page fixes, OpenEnv SFT demo notebook

Relocate training notebooks, add BLOG and Google Colab links (SFT + GRPO HF Job), dashboard updates, and eval artifacts

Add GRPO HF job reward/loss curves, dashboard wiring, plot script, and fix grpo_train log_history unwrap

feat: added images, new sft notebook, jobs to do grpo

feat: training results page + SFT Colab notebook

fix: trainer notebook improvements

fix: gemini retry backoff + tom belief diagnostic logging

fix: resolve WebSocket HTTP 403 on OpenEnv env server

feat: streamline parlay for demo mode and add spectator negotiation mechanics

fix: fixed UI bugs, keyless testing initiated

refactor(agent): migrate Gemini client from google-generativeai to google-genai

feat: project setup