feat(deck): add 08 verification chapter with cross-layer evidence matrix

- New section 'Verification' between hands-on and sources.
- Three evidence layers (static / behavior / integration), each with its
  own exit-code-printing gate snippet.
- Four anti-pattern cards (pipe, swallow, cache, skip integration).
- 'Run it yourself' block links to /hands-on/starter and /hands-on/rules.
- Topnav gains 08 verify anchor.
- Companion SilverBullet pages (EN + PT) written under Guides/:
  * 'AI For Dummies Verification and Evidence.md'
  * 'AI For Dummies Verificação e Evidência.md'
- Both pages reference all 7 existing deck sections and the two labs.

Verify pass: content, interaction, and standalone for presentation, plus
the three rules-page checks.

responsive.css

@@ -53,7 +53,7 @@ button{font-family:inherit}
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 .builder-loop{display:grid;grid-template-columns:200px 1fr;gap:25px;padding:23px 28px;color:var(--ink);background:var(--gold)}.builder-loop>span{font:700 9px 'DM Mono',monospace;letter-spacing:.09em}.builder-loop>div{font:600 11px 'DM Mono',monospace}.builder-loop i{margin:0 12px;color:var(--accent);font-style:normal}.builder-steps button:focus-visible{position:relative;z-index:2;outline:3px solid var(--gold);outline-offset:-3px}
 
-.skill-catalog{margin-bottom:130px;padding-top:80px;border-top:1px solid var(--line)}
+.skill-catalog{margin-bottom:130px;padding-top:80px;border-top:1px solid var(--line)}.verification{padding-top:80px;border-top:1px solid var(--line);margin-bottom:130px}.verify-intro{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;align-items:end;margin:45px 0}.verify-intro h2{margin-bottom:0}.verify-intro>p{max-width:650px;margin:0;color:var(--muted);font-size:14px;line-height:1.75}.verify-layers{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:1px;background:var(--line);border:1px solid var(--line)}.verify-layers article{background:var(--paper);padding:24px 22px;display:grid;gap:12px;grid-template-rows:auto auto 1fr auto}.verify-layers article>span{font:500 9px 'DM Mono',monospace;letter-spacing:.09em;color:var(--accent)}.verify-layers article h3{margin:0;font-size:18px;letter-spacing:-.02em}.verify-layers article p{margin:0;color:var(--muted);font-size:13px;line-height:1.55}.verify-layers article code{font:10.5px ui-monospace,monospace;color:var(--ink);background:var(--paper);border:1px solid var(--line);padding:10px 12px;white-space:pre-wrap;word-break:break-word;line-height:1.55}.verify-antipatterns{margin-top:55px}.verify-antipatterns>span{font:500 9px 'DM Mono',monospace;letter-spacing:.09em;color:var(--muted)}.ap-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;margin-top:14px;background:var(--line);border:1px solid var(--line)}.ap-grid article{display:grid;grid-template-columns:auto 1fr;gap:8px 18px;align-items:start;background:var(--paper);padding:18px 20px}.ap-grid article b{font:500 22px 'DM Mono',monospace;color:var(--accent);line-height:1;align-self:center}.ap-grid article strong{font-size:15px;letter-spacing:-.01em}.ap-grid article p{margin:6px 0 0;color:var(--muted);font-size:13px;line-height:1.5}.ap-grid article code{font:11px ui-monospace,monospace;color:var(--ink);background:var(--paper);padding:1px 4px;border:1px solid var(--line)}.verify-cta{margin-top:55px;padding:26px 28px;color:var(--paper);background:var(--ink)}.verify-cta>span{font:500 9px 'DM Mono',monospace;letter-spacing:.09em;color:var(--gold)}.verify-cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:1px;margin-top:18px;background:#ffffff1f}.verify-card{display:grid;gap:6px;background:var(--ink);padding:20px 22px;color:var(--paper);text-decoration:none;border-bottom:2px solid var(--gold)}.verify-card strong{font-size:17px;letter-spacing:-.01em}.verify-card p{margin:0;color:#bfccd4;font-size:13px;line-height:1.55}.verify-card p code{font:11px ui-monospace,monospace;color:var(--gold);background:#0f2230;padding:1px 5px;border:1px solid #2a4150}.verify-card small{font:500 10px 'DM Mono',monospace;color:var(--gold);letter-spacing:.09em}@media(max-width:880px){.verify-layers,.verify-cta-grid{grid-template-columns:1fr}.verify-intro{grid-template-columns:1fr}}@media(max-width:560px){.verify-intro{display:block}.verify-intro>p{margin-top:18px}.ap-grid{grid-template-columns:1fr}.verify-cta{padding:22px 20px}}
 .catalog-intro{display:grid;grid-template-columns:.9fr 1.1fr;gap:70px;align-items:end;margin:45px 0}.catalog-intro h2{margin-bottom:0}.catalog-intro>p{max-width:620px;margin:0;color:var(--muted);font-size:14px;line-height:1.75}
 .skill-deck{display:grid;grid-template-columns:minmax(270px,.8fr) minmax(0,1.7fr);min-height:620px;border:1px solid var(--line);background:var(--line)}
 .skill-index{display:grid;grid-template-rows:repeat(7,1fr);gap:1px;background:var(--line)}