Strip em-dashes; fix trap-library facts (4 held-out, 7 categories); explicit hardware-optimisation framing; cleaner 1x2 results grid

Sync chunk: docs (diagrams + plots)

Add training metrics grid; fix hardware-target claims (no RISC-V/Cortex-A78); add HF Jobs link

Push diagrams + updated README (blog assets, env explainer)

Sync latest submission updates (GRPO-only + blog markdown + bugfixes)