spec parser: GPU duration back to 120s (within ZeroGPU cap)

Fix spec-parser cold-start hang: pre-cache weights at boot

Audit remediation: XSS fix, pinned loaders, engine bug fixes, honest claims, head_dim KV, hackathon tags

Vision/diffusion compute-roofline speed (FPS + s/image); fine-tune VRAM validation+sweep; flag-gated eager model load

Fix spec-parser GPU window; clearer chart colours, unclipped label

Paste box goes live: fine-tuned spec parser fills the form from messy text