Cite canonical source in Guide anti-gaming bullets

[PunchTheDev]

Summary

Each of the 7 anti-gaming bullets in QuickstartGuide.tsx gets cursor-help + a tooltip naming the specific attack vector it prevents and citing the canonical source file in forge. Bullet 2 is fixed from a false claim.

Motivation

The bullets were terse one-liners with no link to the canonical threat-model doc. A first-timer reading "Determinism check" or "Similarity check" learned nothing about what attack the check stops or where in the harness it lives.

Separately, bullet 2 claimed "Full coverage — final scoring runs all 45 problems, no sampling variance". That contradicts scripts/run_eval_pool.py L37–49 and .github/workflows/eval.yml L150, which both run only 3 specs per PR (one random spec per round). The claim is replaced with the accurate "Three-round sampling — each PR scores 3 of 45 problems, one random spec per round" plus a tooltip explaining the CI-time tradeoff.

Changes

• src/components/QuickstartGuide.tsx L838–878: 7-item bullet list converted from string array to { label, tip } objects; each label rendered with cursor-help border-b border-dotted so the hover affordance is visible. Tooltips cite scripts/run_eval_pool.py, scripts/check_source_similarity.py, forge/sdk/llm.py (FORGE_MODEL_WHITELIST), benchmark/sandbox.py, specs/generator.py, benchmark/fea.py.
• Bullet 2 reframed from false "Full coverage — all 45 problems" to accurate "Three-round sampling — 3 of 45, one random per round".
• BACKLOG.md L115: Anti-gaming guarantees flipped ○ ○ ○ → ● ● ● with rationale.

Verification

Puppeteer at 1440×900 on /guide#anti-gaming:

• 7 bullets present
• Each has cursor-help + border-dotted + non-empty title attr (lengths 127, 223, 127, 157, 170, 159, 192 chars)
• Bullet 2 text matches new Three-round sampling framing
• 0 new console errors